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.

Shop Fasteners & Mounting Stainless Screws Mounting Brackets

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.

Quick Shop Fitment Hardware Types Install Notes Inspection FAQ Deck Hardware Tools

Popular Fastener & Mounting Searches

Stainless ScrewsWood, sheet metal, and self-tapping screws Bolts & Machine ScrewsHex, carriage, socket, and machine hardware Nuts & WashersFlat, lock, fender, and nylon-insert options Mounting BracketsElectronics, antennas, lights, and accessories Backing PlatesLoad spreading for cleats and deck hardware Rivets & Blind FastenersOne-sided fastening and repair work SealantsWatertight bedding and deck penetrations Thread LockersVibration resistance for threaded hardware Anti-SeizePrevent galling on stainless threads

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.

316 Stainless 304 Stainless Threaded Rod

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.

Stainless Fasteners

Screws, bolts, nuts, washers, threaded rod, lock nuts, and specialty head styles for marine repair and upgrades.

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.

Washers Nuts Adhesives

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.

Shop Fasteners & Mounting Backing Plates Sealants

Sort by

View as

Seachoice 18-8 Stainless Steel Acorn Cap Nuts, 1/4-20 Size, Pack of 100

$92.89 - $92.89

$92.89

$92.89 - $92.89

$92.89

Item locally warehoused

Seachoice 18-8 Stainless Steel Acorn Cap Nuts are a marine-ready choice for finishing 1/4-20 threaded fasteners. The closed, rounded cap style help...

View full details

$92.89 - $92.89

$92.89

$92.89 - $92.89

$92.89

Phillips Machine Screw - Pan Head. 1/4"-20 x 5"

$62.19 - $62.19

$62.19

$62.19 - $62.19

$62.19

Item locally warehoused

Use this Phillips pan head machine screw to help secure components where a 1/4"-20 thread and 5" length are required. Built from 18-8 stainless ste...

View full details

$62.19 - $62.19

$62.19

$62.19 - $62.19

$62.19

Phillips Machine Screw - Oval Head, 1/4"-20 x 1"

$99.69 - $99.69

$99.69

$99.69 - $99.69

$99.69

Item locally warehoused

A Phillips oval head machine screw sized 1/4"-20 x 1" for fastening applications where a finished, domed oval head helps distribute load under the ...

View full details

$99.69 - $99.69

$99.69

$99.69 - $99.69

$99.69

Phillips Machine Screw - Pan Head. 8-32 x 2"

$39.89 - $39.89

$39.89

$39.89 - $39.89

$39.89

Item locally warehoused

Phillips pan head machine screw (8-32 x 2") made from 18-8 stainless steel—ideal for marine hardware mounting where corrosion resistance matters. K...

View full details

$39.89 - $39.89

$39.89

$39.89 - $39.89

$39.89

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

$45.19 - $45.19

$45.19

$45.19 - $45.19

$45.19

Item locally warehoused

Phillips tapping screws with an oval head in #14 x 3/4" size, made from 18-8 stainless steel for dependable corrosion resistance in marine and othe...

View full details

$45.19 - $45.19

$45.19

$45.19 - $45.19

$45.19

Seachoice 18-8 Stainless Steel Acorn Cap Nuts, 10-24 Size, Pack of 100

$67.89 - $67.89

$67.89

$67.89 - $67.89

$67.89

Item locally warehoused

Finish and protect exposed bolt threads with these Seachoice 18-8 stainless steel acorn cap nuts. The closed-end, rounded head helps deliver an att...

View full details

$67.89 - $67.89

$67.89

$67.89 - $67.89

$67.89

Phillips Machine Screw - Pan Head. 1/4"-20 x 3-1/2"

$87.69 - $87.69

$87.69

$87.69 - $87.69

$87.69

Item locally warehoused

Secure and finish threaded assemblies with this Phillips pan head machine screw sized 1/4"-20 x 3-1/2". Made from 18-8 stainless steel for strong c...

View full details

$87.69 - $87.69

$87.69

$87.69 - $87.69

$87.69

Phillips Machine Screw - Pan Head. 1/4"-20 x 3"

$68.79 - $68.79

$68.79

$68.79 - $68.79

$68.79

Item locally warehoused

Phillips machine screw with a pan head design in 18-8 stainless steel—built for reliable, corrosion-resistant fastening where a machine screw is th...

View full details

$68.79 - $68.79

$68.79

$68.79 - $68.79

$68.79

Phillips Machine Screw - Pan Head. 8-32 x 1-1/4"

$65.79 - $65.79

$65.79

$65.79 - $65.79

$65.79

Item locally warehoused

Keep fasteners uniform across your project with this Phillips pan head machine screw in 8-32 x 1-1/4" size, made from 18-8 stainless steel for corr...

View full details

$65.79 - $65.79

$65.79

$65.79 - $65.79

$65.79

Phillips Machine Screw - Pan Head. 1/4"-20 x 1-3/4"

$68.69 - $68.69

$68.69

$68.69 - $68.69

$68.69

Item locally warehoused

Replacement Phillips pan head machine screw in 18-8 stainless steel, sized 1/4"-20 x 1-3/4". Supplied as a bulk quantity (SKU: 50-00513). Key Featu...

View full details

$68.69 - $68.69

$68.69

$68.69 - $68.69

$68.69

Seachoice 18-8 Stainless Steel Phillips Barrel Nuts w/ Truss Head, 1/4-20 X 5/8 In., Pack of 25

$191.79 - $191.79

$191.79

$191.79 - $191.79

$191.79

Item locally warehoused

Seachoice Phillips Barrel Nuts With Truss Head are made from 18-8 stainless steel to resist the corrosive effects of marine environments. They prov...

View full details

$191.79 - $191.79

$191.79

$191.79 - $191.79

$191.79

Phillips Machine Screw - Pan Head. 1/4"-20 x 1-1/4"

$64.69 - $64.69

$64.69

$64.69 - $64.69

$64.69

Item locally warehoused

Durable Phillips-drive machine screw designed for secure fastening in marine and general hardware applications. Key Features Phillips pan head for...

View full details

$64.69 - $64.69

$64.69

$64.69 - $64.69

$64.69

Seachoice 18-8 Stainless Steel Phillips Barrel Nuts w/ Truss Head, 3/8-16 X 3/4 In., Pack of 25

$87.99 - $87.99

$87.99

$87.99 - $87.99

$87.99

Item locally warehoused

Seachoice 18-8 stainless steel Phillips barrel nuts with truss head (3/8-16 x 3/4 in.) are built for dependable, corrosion-resistant fastening in m...

View full details

$87.99 - $87.99

$87.99

$87.99 - $87.99

$87.99

Phillips Machine Screw - Pan Head. 8-32 x 1-1/2"

$61.09 - $61.09

$61.09

$61.09 - $61.09

$61.09

Item locally warehoused

Phillips pan head machine screw in 8-32 x 1-1/2" size, made from 18-8 stainless steel for corrosion resistance. Key Features Phillips pan head des...

View full details

$61.09 - $61.09

$61.09

$61.09 - $61.09

$61.09

Phillips Machine Screw - Pan Head. 1/4"-20 x 1"

$88.59 - $88.59

$88.59

$88.59 - $88.59

$88.59

Item locally warehoused

Replace or stock up on Phillips pan head machine screws sized 1/4"-20 x 1"—built in 18-8 stainless steel for reliable performance in marine and oth...

View full details

$88.59 - $88.59

$88.59

$88.59 - $88.59

$88.59

Phillips Machine Screw - Pan Head. 1/4"-20 x 2"

$82.29 - $82.29

$82.29

$82.29 - $82.29

$82.29

Item locally warehoused

Phillips machine screw with a pan head, size 1/4"-20 x 2". Made from 18-8 stainless steel for corrosion resistance in marine and outdoor applicatio...

View full details

$82.29 - $82.29

$82.29

$82.29 - $82.29

$82.29

Phillips Machine Screw - Pan Head. 1/4"-20 x 1-1/2"

$59.49 - $59.49

$59.49

$59.49 - $59.49

$59.49

Item locally warehoused

Phillips pan head machine screw in 1/4"-20 x 1-1/2" size, made from 18-8 stainless steel for corrosion resistance in marine and general-purpose fas...

View full details

$59.49 - $59.49

$59.49

$59.49 - $59.49

$59.49

Seachoice 18-8 Stainless Steel Phillips Barrel Nuts w/ Truss Head, 8-32 X 3/8 In., Pack of 25

$96.69 - $96.69

$96.69

$96.69 - $96.69

$96.69

Item locally warehoused

Seachoice 18-8 Stainless Steel Phillips Barrel Nuts with Truss Head are engineered for secure, corrosion-resistant fastening in marine and deck har...

View full details

$96.69 - $96.69

$96.69

$96.69 - $96.69

$96.69

Phillips Machine Screw - Pan Head. 8-32 x 1/2"

$31.31 - $31.31

$31.31

$31.31 - $31.31

$31.31

Item locally warehoused

A Phillips pan head machine screw sized for clean, low-profile mounting. This fastener is 8-32 x 1/2" and made from 18-8 stainless steel for corros...

View full details

$31.31 - $31.31

$31.31

$31.31 - $31.31

$31.31

Phillips Machine Screw - Pan Head. 8-32 x 1"

$41.99 - $41.99

$41.99

$41.99 - $41.99

$41.99

Item locally warehoused

A Phillips pan head machine screw made from 18-8 stainless steel, sized 8-32 x 1" for general-purpose fastening. Key Features Phillips drive for s...

View full details

$41.99 - $41.99

$41.99

$41.99 - $41.99

$41.99

Phillips Machine Screw - Flat Head, 3/8"-16 x 4"

$91.79 - $91.79

$91.79

$91.79 - $91.79

$91.79

Item locally warehoused

Phillips machine screw with a flat head in 18-8 stainless steel—3/8"-16 thread size and 4" length for fastening applications where corrosion resist...

View full details

$91.79 - $91.79

$91.79

$91.79 - $91.79

$91.79

Phillips Machine Screw - Pan Head. 8-32 x 3/8"

$56.99 - $56.99

$56.99

$56.99 - $56.99

$56.99

Out of stock

Phillips Machine Screw in 18-8 stainless steel for corrosion resistance and general-purpose assembly. Size: 8-32 x 3/8\" Head: Pan Drive: Phillips ...

View full details

$56.99 - $56.99

$56.99

$56.99 - $56.99

$56.99

Sold out

Phillips Machine Screw - Pan Head. 8-32 x 3/4"

$43.49 - $43.49

$43.49

$43.49 - $43.49

$43.49

Item locally warehoused

Replace or stock up on this Seachoice Phillips pan head machine screw in 8-32 x 3/4" size for marine and general hardware mounting needs. Made from...

View full details

$43.49 - $43.49

$43.49

$43.49 - $43.49

$43.49

Phillips Machine Screw - Truss Head 1/4-20 x 1-1/2"

$102.89 - $102.89

$102.89

$102.89 - $102.89

$102.89

Out of stock

18-8 stainless steel Phillips machine screw with a truss head. Size 1/4-20 x 1-1/2\".Compatible Applications General fastener for assemblies needin...

View full details

$102.89 - $102.89

$102.89

$102.89 - $102.89

$102.89

Sold out

$63.39 - $63.39

$63.39

$63.39 - $63.39

$63.39

Out of stock

This machine screw features 18-8 stainless steel for corrosion resistance, with an oval head and Phillips drive. Size: 10-24 threads per inch, leng...

View full details

$63.39 - $63.39

$63.39

$63.39 - $63.39

$63.39

Sold out

Fasteners & Mounting

Marine Fasteners, Mounting Hardware & Installation Supplies

Choose the Right Metal, Size, and Support

Saltwater Hardware Needs Material Discipline

Stainless Fasteners

Mounting Hardware

Bedding & Bonding

Seal Holes and Spread Loads

Replace Corroded, Loose, or Mismatched Hardware

Good Hardware Makes Upgrades Last

Marine Fastener Questions

Shop Marine Fasteners, Brackets, Backing Plates & Sealants

Filters