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Fasteners & Mounting

Marine Hardware & Installation

Marine Fasteners, Mounting Hardware & Installation Supplies

Shop marine-grade screws, bolts, nuts, washers, brackets, backing plates, rivets, mounting pads, sealants, thread lockers, and anti-seize for secure hardware installations in saltwater environments.

Install Check

Match metal grade, fastener size, thread type, backing support, bedding compound, and load direction before drilling into the boat.

Shop Backing Plates

Use marine-grade hardware and proper sealing practices. Confirm load ratings, material compatibility, corrosion risk, deck core protection, and manufacturer instructions before installation.

Fitment

Choose the Right Metal, Size, and Support

Marine fasteners need to match the job. Consider stainless grade, length, diameter, head style, thread type, washer size, backing plate needs, and whether the hardware is loaded in pull, shear, or vibration.

Corrosion

Saltwater Hardware Needs Material Discipline

316 stainless is commonly preferred for saltwater exposure, while 304 stainless may suit freshwater or less demanding areas. Isolate dissimilar metals where needed and use anti-seize on stainless threads to reduce galling.

If a fastener is structural or safety-critical, confirm the correct grade, torque, backing, and installation method.

MNT

Mounting Hardware

Brackets, bases, pads, backing plates, antenna mounts, rod holder mounts, and accessory supports.

BED

Bedding & Bonding

Sealants, adhesives, thread lockers, anti-seize, and bedding compounds help hardware stay secure and watertight.

Install Notes

Seal Holes and Spread Loads

Fastener selection is only part of the job. Hardware installed through decks, cabins, rails, transoms, or cored panels needs the right pilot hole, sealant, backing, washer, and torque.

Pilot holesUse the correct drill size for the fastener, substrate, and thread engagement.
Bedding compoundSeal penetrations to keep water out of cores, cabins, lockers, and electronics areas.
Backing platesSpread loads for cleats, davits, ladders, rails, seats, and high-load deck hardware.
Thread careUse thread locker or anti-seize where appropriate, especially on stainless-to-stainless threads.

Inspection

Replace Corroded, Loose, or Mismatched Hardware

Check for rust streaks, loose brackets, elongated holes, cracked sealant, missing washers, galvanic corrosion, stripped threads, and water intrusion around mounted hardware.

Projects

Good Hardware Makes Upgrades Last

Electronics, antennas, cleats, rod holders, seats, speakers, lights, ladders, hatches, and deck fittings all rely on correctly chosen mounting hardware.

For heavy or safety-related gear, do a dry fit, mark hole locations carefully, and confirm access to the backside before drilling.

FAQ

Marine Fastener Questions

Should I use 304 or 316 stainless fasteners on a boat?

316 stainless is usually preferred for saltwater and exposed marine use because it has stronger corrosion resistance. 304 stainless can be suitable for freshwater or less exposed applications.

Why do stainless fasteners seize or gall?

Stainless threads can gall when tightened under friction, especially stainless-on-stainless. Anti-seize, correct thread engagement, and careful tightening can help reduce the risk.

When do I need a backing plate?

Use backing plates when hardware carries significant load, such as cleats, rails, ladders, davits, seats, and deck fittings. Backing plates spread load and help prevent crushing or pull-through.

Should deck fasteners be sealed?

Yes. Holes through decks, cabins, and cored panels should be sealed with the correct marine bedding compound to help prevent leaks and core damage.

Ready for a Stronger Install?

Shop Marine Fasteners, Brackets, Backing Plates & Sealants

Search by fastener type, material, size, head style, mounting application, sealant need, bracket type, or installation project.

Filters

Nylon Insert Locknut - Stainless 12-24

Original price $143.79 - Original price $143.79
Original price
$143.79
$143.79 - $143.79
Current price $143.79
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A stainless nylon insert locknut designed to help resist loosening from vibration while providing a corrosion-resistant fastening option. Key Featu...

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Original price $143.79 - Original price $143.79
Original price
$143.79
$143.79 - $143.79
Current price $143.79

Phillips Tapping Screws - Flat Head, #14 x 3/4"

Original price $82.99 - Original price $82.99
Original price
$82.99
$82.99 - $82.99
Current price $82.99
Item locally warehoused

Reliable Phillips tapping screws for marine and general mounting jobs—made from 18-8 stainless steel for corrosion resistance. Key Features Philli...

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Original price $82.99 - Original price $82.99
Original price
$82.99
$82.99 - $82.99
Current price $82.99

Phillips Tapping Screws - Oval Head, #10 x 1-1/4"

Original price $50.39 - Original price $50.39
Original price
$50.39
$50.39 - $50.39
Current price $50.39
Item locally warehoused

Phillips tapping screws with an oval head design and #10 size for fast, reliable fastening in marine and hardware applications. Key Features Phill...

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Original price $50.39 - Original price $50.39
Original price
$50.39
$50.39 - $50.39
Current price $50.39

Nylon Insert Locknut - Stainless 1/4-20

Original price $40.19 - Original price $40.19
Original price
$40.19
$40.19 - $40.19
Current price $40.19
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Keep fasteners secure in vibration-prone marine and outdoor applications with this 1/4-20 stainless nylon insert locknut. The nylon insert helps in...

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Original price $40.19 - Original price $40.19
Original price
$40.19
$40.19 - $40.19
Current price $40.19

Phillips Tapping Screws - Flat Head, #14 x 1-1/4"

Original price $48.59 - Original price $48.59
Original price
$48.59
$48.59 - $48.59
Current price $48.59
Item locally warehoused

Phillips tapping screws with a flat head in #14 x 1-1/4" size, made from 18-8 stainless steel for reliable corrosion resistance in marine and outdo...

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Original price $48.59 - Original price $48.59
Original price
$48.59
$48.59 - $48.59
Current price $48.59

Phillips Tapping Screw - Pan Head, #8 x 5/8"

Original price $33.89 - Original price $33.89
Original price
$33.89
$33.89 - $33.89
Current price $33.89
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Phillips tapping screw with a pan head design in 18-8 stainless steel for corrosion-resistant fastening in marine and general hardware applications...

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Original price $33.89 - Original price $33.89
Original price
$33.89
$33.89 - $33.89
Current price $33.89

Phillips Tapping Screws - Oval Head, #10 x 3/4"

Original price $28.09 - Original price $28.09
Original price
$28.09
$28.09 - $28.09
Current price $28.09
Item locally warehoused

Phillips tapping screws with an oval head in #10 x 3/4" size, made from 18-8 stainless steel for corrosion resistance in marine and outdoor applica...

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Original price $28.09 - Original price $28.09
Original price
$28.09
$28.09 - $28.09
Current price $28.09

Phillips Tapping Screws - Flat Head, #14 x 1"

Original price $86.49 - Original price $86.49
Original price
$86.49
$86.49 - $86.49
Current price $86.49
Item locally warehoused

Phillips tapping screws with a flat head design for secure, self-starting fastening in marine and general hardware applications. Key Features Phil...

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Original price $86.49 - Original price $86.49
Original price
$86.49
$86.49 - $86.49
Current price $86.49

Phillips Tapping Screws - Oval Head, #10 x 1"

Original price $49.89 - Original price $49.89
Original price
$49.89
$49.89 - $49.89
Current price $49.89
Item locally warehoused

Phillips tapping screws with an oval head in 18-8 stainless steel, sized #10 x 1" for secure, corrosion-resistant fastening in marine and general m...

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Original price $49.89 - Original price $49.89
Original price
$49.89
$49.89 - $49.89
Current price $49.89

Nylon Insert Locknut - Stainless 10-32

Original price $47.99 - Original price $47.99
Original price
$47.99
$47.99 - $47.99
Current price $47.99
Item locally warehoused

Secure fastenings with this stainless nylon insert locknut. The nylon insert helps resist loosening from vibration—ideal for marine hardware assemb...

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Original price $47.99 - Original price $47.99
Original price
$47.99
$47.99 - $47.99
Current price $47.99

Phillips Tapping Screw - Pan Head, #8 x 1/2"

Original price $26.29 - Original price $26.29
Original price
$26.29
$26.29 - $26.29
Current price $26.29
Item locally warehoused

Phillips tapping screw with a pan head and #8 size for fastening jobs that require a corrosion-resistant screw. Available in 1/2" length and made f...

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Original price $26.29 - Original price $26.29
Original price
$26.29
$26.29 - $26.29
Current price $26.29

Phillips Tapping Screws - Flat Head, #12 x 2-1/2"

Original price $78.69 - Original price $78.69
Original price
$78.69
$78.69 - $78.69
Current price $78.69
Item locally warehoused

Replace worn or missing Phillips tapping screws with a corrosion-resistant 18-8 stainless steel fastener sized for dependable fastening in marine a...

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Original price $78.69 - Original price $78.69
Original price
$78.69
$78.69 - $78.69
Current price $78.69

Phillips Tapping Screws - Flat Head, #4 x 3/4"

Original price $25.99 - Original price $25.99
Original price
$25.99
$25.99 - $25.99
Current price $25.99
Item locally warehoused

Seachoice Phillips tapping screws with a flat head and #4 x 3/4" size, made from 18-8 stainless steel for corrosion-resistant fastening on marine a...

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Original price $25.99 - Original price $25.99
Original price
$25.99
$25.99 - $25.99
Current price $25.99

Phillips Tapping Screws - Flat Head, #4 x 1"

Original price $21.69 - Original price $21.69
Original price
$21.69
$21.69 - $21.69
Current price $21.69
Item locally warehoused

Phillips tapping screws with a flat head profile, sized #4 x 1" and made from 18-8 stainless steel for durable, corrosion-resistant fastening. Key ...

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Original price $21.69 - Original price $21.69
Original price
$21.69
$21.69 - $21.69
Current price $21.69

Nylon Insert Locknut - Stainless 10-24

Original price $47.19 - Original price $47.19
Original price
$47.19
$47.19 - $47.19
Current price $47.19
Item locally warehoused

Secure fastening made for marine hardware work. This Nylon Insert Locknut features 18-8 stainless steel construction with a nylon insert for added ...

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Original price $47.19 - Original price $47.19
Original price
$47.19
$47.19 - $47.19
Current price $47.19

Phillips Tapping Screws - Flat Head, #6 x 3/8"

Original price $18.59 - Original price $18.59
Original price
$18.59
$18.59 - $18.59
Current price $18.59
Item locally warehoused

Phillips tapping screws with a flat head design in 18-8 stainless steel—built for corrosion resistance in marine-style fastening applications. Key ...

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Original price $18.59 - Original price $18.59
Original price
$18.59
$18.59 - $18.59
Current price $18.59

Phillips Tapping Screws - Flat Head, #4 x 1/2"

Original price $19.59 - Original price $19.59
Original price
$19.59
$19.59 - $19.59
Current price $19.59
Item locally warehoused

SeaChoice Phillips tapping screws with a flat head design, sized #4 x 1/2" and made from 18-8 stainless steel for corrosion-resistant fastening in ...

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Original price $19.59 - Original price $19.59
Original price
$19.59
$19.59 - $19.59
Current price $19.59

Phillips Tapping Screws - Flat Head, #12 x 3"

Original price $69.29 - Original price $69.29
Original price
$69.29
$69.29 - $69.29
Current price $69.29
Item locally warehoused

Phillips tapping screws with a flat head in #12 x 3" size, made from 18-8 stainless steel for corrosion-resistant marine hardware applications. Key...

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Original price $69.29 - Original price $69.29
Original price
$69.29
$69.29 - $69.29
Current price $69.29

Nylon Insert Locknut - Stainless 8-32

Original price $34.99 - Original price $34.99
Original price
$34.99
$34.99 - $34.99
Current price $34.99
Item locally warehoused

Nylon Insert Locknut - Stainless 8-32 provides a vibration-resistant locking effect for 8-32 threaded applications. Designed in 18-8 stainless stee...

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Original price $34.99 - Original price $34.99
Original price
$34.99
$34.99 - $34.99
Current price $34.99

Phillips Tapping Screws - Flat Head, #12 x 1-3/4"

Original price $66.39 - Original price $66.39
Original price
$66.39
$66.39 - $66.39
Current price $66.39
Item locally warehoused

Phillips tapping screws with a flat head and corrosion-resistant 18-8 stainless steel construction—ideal for secure, self-starting fastening in mar...

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Original price $66.39 - Original price $66.39
Original price
$66.39
$66.39 - $66.39
Current price $66.39

Phillips Tapping Screw - Pan Head, #8 x 3/8"

Original price $20.69 - Original price $20.69
Original price
$20.69
$20.69 - $20.69
Current price $20.69
Item locally warehoused

Phillips tapping screw with a pan head in #8 x 3/8" size, made from 18-8 stainless steel for reliable, corrosion-resistant fastening in marine and ...

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Original price $20.69 - Original price $20.69
Original price
$20.69
$20.69 - $20.69
Current price $20.69

Phillips Tapping Screws - Oval Head, #10 x 5/8"

Original price $53.99 - Original price $53.99
Original price
$53.99
$53.99 - $53.99
Current price $53.99
Item locally warehoused

18-8 Stainless Steel.

Original price $53.99 - Original price $53.99
Original price
$53.99
$53.99 - $53.99
Current price $53.99

Nylon Insert Locknut - Stainless 4-40

Original price $40.59 - Original price $40.59
Original price
$40.59
$40.59 - $40.59
Current price $40.59
Item locally warehoused

18-8 Stainless Steel.

Original price $40.59 - Original price $40.59
Original price
$40.59
$40.59 - $40.59
Current price $40.59

Phillips Tapping Screws - Oval Head, #8 x 2-1/2"

Original price $43.19 - Original price $43.19
Original price
$43.19
$43.19 - $43.19
Current price $43.19
Item locally warehoused

Phillips tapping screws with an oval head for fastening applications where you want a classic Phillips drive and corrosion-resistant performance. K...

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Original price $43.19 - Original price $43.19
Original price
$43.19
$43.19 - $43.19
Current price $43.19

Phillips Tapping Screws - Flat Head, #12 x 1"

Original price $72.69 - Original price $72.69
Original price
$72.69
$72.69 - $72.69
Current price $72.69
Item locally warehoused

Phillips tapping screws with a flat head—ideal for fastening into metal or other substrates where a corrosion-resistant stainless screw is needed. ...

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Original price $72.69 - Original price $72.69
Original price
$72.69
$72.69 - $72.69
Current price $72.69

Phillips Tapping Screws - Flat Head, #12 x 2"

Original price $62.69 - Original price $62.69
Original price
$62.69
$62.69 - $62.69
Current price $62.69
Item locally warehoused

These Phillips tapping screws feature a flat head and come in size #12 x 2". Built from 18-8 stainless steel for corrosion resistance. Key Features...

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Original price $62.69 - Original price $62.69
Original price
$62.69
$62.69 - $62.69
Current price $62.69

Phillips Tapping Screws - Oval Head, #10 x 1/2"

Original price $46.49 - Original price $46.49
Original price
$46.49
$46.49 - $46.49
Current price $46.49
Item locally warehoused

Phillips tapping screws with an oval head, sized #10 x 1/2", made from 18-8 stainless steel. Ideal for marine hardware and general fastener applica...

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Original price $46.49 - Original price $46.49
Original price
$46.49
$46.49 - $46.49
Current price $46.49

Phillips Tapping Screws - Flat Head, #12 x 1-1/4"

Original price $36.69 - Original price $36.69
Original price
$36.69
$36.69 - $36.69
Current price $36.69
Item locally warehoused

Phillips tapping screws with a flat head profile—ideal for marine hardware and other fastening applications where a clean, countersunk look is help...

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Original price $36.69 - Original price $36.69
Original price
$36.69
$36.69 - $36.69
Current price $36.69

Phillips Tapping Screw - Pan Head, #6 x 1"

Original price $26.79 - Original price $26.79
Original price
$26.79
$26.79 - $26.79
Current price $26.79
Item locally warehoused

Keep marine hardware secure with this Phillips pan head tapping screw made from 18-8 stainless steel. Sized for everyday fastening jobs: #6 x 1". K...

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Original price $26.79 - Original price $26.79
Original price
$26.79
$26.79 - $26.79
Current price $26.79

Phillips Tapping Screw - Pan Head, #6 x 1-1/4"

Original price $36.19 - Original price $36.19
Original price
$36.19
$36.19 - $36.19
Current price $36.19
Item locally warehoused

Phillips tapping screw designed for sheet-metal-style applications—featuring a pan head and a Phillips drive for straightforward installation. Key ...

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Original price $36.19 - Original price $36.19
Original price
$36.19
$36.19 - $36.19
Current price $36.19

Hex Nut 5/8-11

Original price $32.79 - Original price $32.79
Original price
$32.79
$32.79 - $32.79
Current price $32.79
Item locally warehoused

18-8 Stainless Steel.

Original price $32.79 - Original price $32.79
Original price
$32.79
$32.79 - $32.79
Current price $32.79

Phillips Tapping Screw - Pan Head, #6 x 5/8"

Original price $21.89 - Original price $21.89
Original price
$21.89
$21.89 - $21.89
Current price $21.89
Item locally warehoused

A SeaChoice Phillips tapping screw with a pan head for fastening tasks where you need a #6 size and 5/8" length. Key Features Phillips head for co...

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Original price $21.89 - Original price $21.89
Original price
$21.89
$21.89 - $21.89
Current price $21.89

Nylon Insert Locknut - Stainless 6-32

Original price $41.19 - Original price $41.19
Original price
$41.19
$41.19 - $41.19
Current price $41.19
Item locally warehoused

Secure fastener connections with this Nylon Insert Locknut in stainless steel, sized for 6-32 threads. The nylon insert helps resist loosening from...

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Original price $41.19 - Original price $41.19
Original price
$41.19
$41.19 - $41.19
Current price $41.19

Phillips Tapping Screws - Flat Head, #12 x 1-1/2"

Original price $23.69 - Original price $23.69
Original price
$23.69
$23.69 - $23.69
Current price $23.69
Item locally warehoused

Phillips tapping screws with a flat head profile in #12 x 1-1/2" size, made from 18-8 stainless steel for strong corrosion resistance in marine and...

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Original price $23.69 - Original price $23.69
Original price
$23.69
$23.69 - $23.69
Current price $23.69

Phillips Tapping Screws - Oval Head, #8 x 2"

Original price $34.69 - Original price $34.69
Original price
$34.69
$34.69 - $34.69
Current price $34.69
Item locally warehoused

Phillips tapping screws with an oval head in #8 x 2" size for marine and general fastening applications. Supplied as 18-8 stainless steel hardware....

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Original price $34.69 - Original price $34.69
Original price
$34.69
$34.69 - $34.69
Current price $34.69

Phillips Tapping Screw - Pan Head, #6 x 3/4"

Original price $18.59 - Original price $18.59
Original price
$18.59
$18.59 - $18.59
Current price $18.59
Item locally warehoused

A Phillips drive tapping screw with a pan head design in #6 x 3/4" length—made from 18-8 stainless steel for dependable corrosion resistance. Key F...

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Original price $18.59 - Original price $18.59
Original price
$18.59
$18.59 - $18.59
Current price $18.59

Phillips Tapping Screws - Oval Head, #8 x 1-1/4"

Original price $41.19 - Original price $41.19
Original price
$41.19
$41.19 - $41.19
Current price $41.19
Item locally warehoused

Phillips tapping screws with an oval head, made in 18-8 stainless steel for dependable fastening in marine and other corrosion-prone applications. ...

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Original price $41.19 - Original price $41.19
Original price
$41.19
$41.19 - $41.19
Current price $41.19

Phillips Tapping Screw - Pan Head, #6 x 1/2"

Original price $17.99 - Original price $17.99
Original price
$17.99
$17.99 - $17.99
Current price $17.99
Item locally warehoused

A Phillips pan head tapping screw sized #6 x 1/2" for fastening applications that benefit from corrosion-resistant 18-8 stainless steel. Key Featur...

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Original price $17.99 - Original price $17.99
Original price
$17.99
$17.99 - $17.99
Current price $17.99

Phillips Tapping Screws - Oval Head, #8 x 1-3/4"

Original price $29.49 - Original price $29.49
Original price
$29.49
$29.49 - $29.49
Current price $29.49
Item locally warehoused

Phillips tapping screws with an oval head and a #8 x 1-3/4" size, made from 18-8 stainless steel for corrosion-resistant marine fastening. Key Feat...

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Original price $29.49 - Original price $29.49
Original price
$29.49
$29.49 - $29.49
Current price $29.49

Seachoice 00669 1/4"-20 x 3' Threaded Rod - Stainless

Original price $20.89 - Original price $20.89
Original price
$20.89
$20.89 - $20.89
Current price $20.89
Item locally warehoused

Seachoice 00669 1/4"-20 x 3' Threaded Rod - Stainless is an 18-8 stainless steel threaded rod for marine and hardware applications where a corrosio...

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Original price $20.89 - Original price $20.89
Original price
$20.89
$20.89 - $20.89
Current price $20.89

Hex Nut 1/2-13

Original price $57.19 - Original price $57.19
Original price
$57.19
$57.19 - $57.19
Current price $57.19
Item locally warehoused

Secure hardware connections with this 1/2-13 hex nut made from 18-8 stainless steel—ideal for marine and other corrosion-resistant fastening needs....

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Original price $57.19 - Original price $57.19
Original price
$57.19
$57.19 - $57.19
Current price $57.19

Hex Nut 3/8-16

Original price $57.19 - Original price $57.19
Original price
$57.19
$57.19 - $57.19
Current price $57.19
Item locally warehoused

3/8-16 hex nut made from 18-8 stainless steel—ideal for marine and general hardware applications where corrosion resistance matters. Key Features ...

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Original price $57.19 - Original price $57.19
Original price
$57.19
$57.19 - $57.19
Current price $57.19

Phillips Tapping Screws - Flat Head, #12 x 3/4"

Original price $52.99 - Original price $52.99
Original price
$52.99
$52.99 - $52.99
Current price $52.99
Item locally warehoused

18-8 Stainless Steel.

Original price $52.99 - Original price $52.99
Original price
$52.99
$52.99 - $52.99
Current price $52.99

Phillips Tapping Screw - Pan Head, #6 x 3/8"

Original price $14.39 - Original price $14.39
Original price
$14.39
$14.39 - $14.39
Current price $14.39
Item locally warehoused

18-8 Stainless Steel.

Original price $14.39 - Original price $14.39
Original price
$14.39
$14.39 - $14.39
Current price $14.39

Phillips Tapping Screws - Oval Head, #8 x 3/4"

Original price $37.49 - Original price $37.49
Original price
$37.49
$37.49 - $37.49
Current price $37.49
Item locally warehoused

Phillips tapping screws with an oval head for fastening and forming threads in one step—made from 18-8 stainless steel for corrosion resistance. Ke...

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Original price $37.49 - Original price $37.49
Original price
$37.49
$37.49 - $37.49
Current price $37.49

Blind Rivet, 3/16" x 3/4"

Original price $17.99 - Original price $17.99
Original price
$17.99
$17.99 - $17.99
Current price $17.99
Item locally warehoused

Use this SeaChoice blind rivet for clean, secure fastening when you need to join materials from one side. The aluminum rivet size is 3/16" diameter...

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Original price $17.99 - Original price $17.99
Original price
$17.99
$17.99 - $17.99
Current price $17.99

Hex Nut 5/16-18

Original price $49.99 - Original price $49.99
Original price
$49.99
$49.99 - $49.99
Current price $49.99
Item locally warehoused

A general-purpose hex nut sized for 5/16-18 threaded hardware, made from 18-8 stainless steel for corrosion resistance in demanding environments. K...

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Original price $49.99 - Original price $49.99
Original price
$49.99
$49.99 - $49.99
Current price $49.99

Phillips Tapping Screws - Oval Head, #8 x 1-1/2"

Original price $47.29 - Original price $47.29
Original price
$47.29
$47.29 - $47.29
Current price $47.29
Item locally warehoused

Phillips oval head tapping screws in 18-8 stainless steel for secure, one-motion fastening in sheet metal and similar applications. Key Features P...

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Original price $47.29 - Original price $47.29
Original price
$47.29
$47.29 - $47.29
Current price $47.29