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.
Match metal grade, fastener size, thread type, backing support, bedding compound, and load direction before drilling into the boat.
Use marine-grade hardware and proper sealing practices. Confirm load ratings, material compatibility, corrosion risk, deck core protection, and manufacturer instructions before installation.
Popular Fastener & Mounting Searches
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.
Stainless Fasteners
Screws, bolts, nuts, washers, threaded rod, lock nuts, and specialty head styles for marine repair and upgrades.
Mounting Hardware
Brackets, bases, pads, backing plates, antenna mounts, rod holder mounts, and accessory supports.
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.
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
A stainless nylon insert locknut designed to help resist loosening from vibration while providing a corrosion-resistant fastening option. Key Featu...
View full detailsPhillips Tapping Screws - Flat Head, #14 x 3/4"
Reliable Phillips tapping screws for marine and general mounting jobs—made from 18-8 stainless steel for corrosion resistance. Key Features Philli...
View full detailsPhillips Tapping Screws - Oval Head, #10 x 1-1/4"
Phillips tapping screws with an oval head design and #10 size for fast, reliable fastening in marine and hardware applications. Key Features Phill...
View full detailsNylon Insert Locknut - Stainless 1/4-20
Keep fasteners secure in vibration-prone marine and outdoor applications with this 1/4-20 stainless nylon insert locknut. The nylon insert helps in...
View full detailsPhillips Tapping Screws - Flat Head, #14 x 1-1/4"
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...
View full detailsPhillips Tapping Screw - Pan Head, #8 x 5/8"
Phillips tapping screw with a pan head design in 18-8 stainless steel for corrosion-resistant fastening in marine and general hardware applications...
View full detailsPhillips Tapping Screws - Oval Head, #10 x 3/4"
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...
View full detailsPhillips Tapping Screws - Flat Head, #14 x 1"
Phillips tapping screws with a flat head design for secure, self-starting fastening in marine and general hardware applications. Key Features Phil...
View full detailsPhillips Tapping Screws - Oval Head, #10 x 1"
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...
View full detailsNylon Insert Locknut - Stainless 10-32
Secure fastenings with this stainless nylon insert locknut. The nylon insert helps resist loosening from vibration—ideal for marine hardware assemb...
View full detailsPhillips Tapping Screw - Pan Head, #8 x 1/2"
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...
View full detailsPhillips Tapping Screws - Flat Head, #12 x 2-1/2"
Replace worn or missing Phillips tapping screws with a corrosion-resistant 18-8 stainless steel fastener sized for dependable fastening in marine a...
View full detailsPhillips Tapping Screws - Flat Head, #4 x 3/4"
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...
View full detailsPhillips Tapping Screws - Flat Head, #4 x 1"
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 ...
View full detailsNylon Insert Locknut - Stainless 10-24
Secure fastening made for marine hardware work. This Nylon Insert Locknut features 18-8 stainless steel construction with a nylon insert for added ...
View full detailsPhillips Tapping Screws - Flat Head, #6 x 3/8"
Phillips tapping screws with a flat head design in 18-8 stainless steel—built for corrosion resistance in marine-style fastening applications. Key ...
View full detailsPhillips Tapping Screws - Flat Head, #4 x 1/2"
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 ...
View full detailsPhillips Tapping Screws - Flat Head, #12 x 3"
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...
View full detailsNylon Insert Locknut - Stainless 8-32
Nylon Insert Locknut - Stainless 8-32 provides a vibration-resistant locking effect for 8-32 threaded applications. Designed in 18-8 stainless stee...
View full detailsPhillips Tapping Screws - Flat Head, #12 x 1-3/4"
Phillips tapping screws with a flat head and corrosion-resistant 18-8 stainless steel construction—ideal for secure, self-starting fastening in mar...
View full detailsPhillips Tapping Screw - Pan Head, #8 x 3/8"
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 ...
View full detailsPhillips Tapping Screws - Oval Head, #10 x 5/8"
18-8 Stainless Steel.
Nylon Insert Locknut - Stainless 4-40
18-8 Stainless Steel.
Phillips Tapping Screws - Oval Head, #8 x 2-1/2"
Phillips tapping screws with an oval head for fastening applications where you want a classic Phillips drive and corrosion-resistant performance. K...
View full detailsPhillips Tapping Screws - Flat Head, #12 x 1"
Phillips tapping screws with a flat head—ideal for fastening into metal or other substrates where a corrosion-resistant stainless screw is needed. ...
View full detailsPhillips Tapping Screws - Flat Head, #12 x 2"
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...
View full detailsPhillips Tapping Screws - Oval Head, #10 x 1/2"
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...
View full detailsPhillips Tapping Screws - Flat Head, #12 x 1-1/4"
Phillips tapping screws with a flat head profile—ideal for marine hardware and other fastening applications where a clean, countersunk look is help...
View full detailsPhillips Tapping Screw - Pan Head, #6 x 1"
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...
View full detailsPhillips Tapping Screw - Pan Head, #6 x 1-1/4"
Phillips tapping screw designed for sheet-metal-style applications—featuring a pan head and a Phillips drive for straightforward installation. Key ...
View full detailsHex Nut 5/8-11
18-8 Stainless Steel.
Phillips Tapping Screw - Pan Head, #6 x 5/8"
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...
View full detailsNylon Insert Locknut - Stainless 6-32
Secure fastener connections with this Nylon Insert Locknut in stainless steel, sized for 6-32 threads. The nylon insert helps resist loosening from...
View full detailsPhillips Tapping Screws - Flat Head, #12 x 1-1/2"
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...
View full detailsPhillips Tapping Screws - Oval Head, #8 x 2"
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....
View full detailsPhillips Tapping Screw - Pan Head, #6 x 3/4"
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...
View full detailsPhillips Tapping Screws - Oval Head, #8 x 1-1/4"
Phillips tapping screws with an oval head, made in 18-8 stainless steel for dependable fastening in marine and other corrosion-prone applications. ...
View full detailsPhillips Tapping Screw - Pan Head, #6 x 1/2"
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...
View full detailsPhillips Tapping Screws - Oval Head, #8 x 1-3/4"
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...
View full detailsSeachoice 00669 1/4"-20 x 3' Threaded Rod - Stainless
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...
View full detailsHex Nut 1/2-13
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....
View full detailsHex Nut 3/8-16
3/8-16 hex nut made from 18-8 stainless steel—ideal for marine and general hardware applications where corrosion resistance matters. Key Features ...
View full detailsPhillips Tapping Screws - Flat Head, #12 x 3/4"
18-8 Stainless Steel.
Phillips Tapping Screw - Pan Head, #6 x 3/8"
18-8 Stainless Steel.
Phillips Tapping Screws - Oval Head, #8 x 3/4"
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...
View full detailsBlind Rivet, 3/16" x 3/4"
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...
View full detailsHex Nut 5/16-18
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...
View full detailsPhillips Tapping Screws - Oval Head, #8 x 1-1/2"
Phillips oval head tapping screws in 18-8 stainless steel for secure, one-motion fastening in sheet metal and similar applications. Key Features P...
View full details