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.
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Attwood 99DFPVSS1S Straight Gas Deck Fill For Pressure Release Systems, Stainless Cap
Dual 1 psi diurinal emission control overpressure relief safety valves Triple high-flow vacuum valves ensure maximum make-up air flow with minimum...
View full detailsAttwood 99DFPVAS1S Angled Gas Deck Fill For Pressure Release Systems, Stainless Cap
Dual 1 psi diurinal emission control overpressure relief safety valves Triple high-flow vacuum valves ensure maximum make-up air flow with minimum...
View full detailsAttwood 99DFCCAS1S Angled Deck Fill For Carbon Canister Systems, Stainless Cap
Dual 1 psi overpressure relief safety valves built into the cap Automatic nozzle shutoff 4-18 gpm Hinged audible click cap meets EPA requirements ...
View full detailsAttwood Deck Fill Replacement Cap For 66406, 66408, 66408C1, Stainless Steel
Restore the closure on select Attwood deck fill assemblies with this stainless steel replacement cap and attached beaded chain. Built for a secure,...
View full detailsAttwood Deck Fill Replacement Cap For 66126, Stainless Steel
Keep your Attwood deck fill system sealed and ready with this replacement deck fill cap made from 316 stainless steel. The cap comes attached with ...
View full detailsSeachoice Corrosion-Resistant Cast 316 Stainless Steel Deck Fill Waste Fill w/ Cap
This Seachoice Deck Fill Plate features premium construction for reliable performance as a waste fill and a long service life in harsh marine envir...
View full detailsSeachoice Corrosion-Resistant Cast 316 Stainless Steel Deck Fill, Water Fill w/ Cap
This Seachoice Deck Fill Plate features premium construction for reliable performance as a water fill and a long service life in harsh marine envir...
View full detailsSeachoice Corrosion-Resistant Cast 316 Stainless Steel Deck Fill, Diesel Fill w/ Cap
This Seachoice Deck Fill Plate features premium construction for reliable performance as a diesel fill and a long service life in harsh marine envi...
View full detailsSeachoice Corrosion-Resistant Cast 316 Stainless Steel Deck Fill, Gas Fill w/ Cap
This Seachoice Deck Fill Plate features premium construction for reliable performance as a gas fill and a long service life in harsh marine environ...
View full detailsSeachoice 32061 Deck Mount Gas Fill Plate w/ Vent, Hinged Flip-Top, Molded Black Plastic
Seachoice Deck Mount Fill Plates combine excellent build quality and exceptional value in a replacement fill plate. This model is fabricated from r...
View full detailsSeachoice 32051 Deck Mount Gas Fill Plate w/ Locking Cap, Cast 316 Stainless Steel, Includes 2 Keys
Seachoice Deck Mount Fill Plates combine excellent build quality and exceptional value in a replacement fill plate. This model is fabricated from i...
View full detailsSeachoice Deck Mount Gas Fill Plate w/ Plastic Cap, Chrome-Plated Zinc, Includes Ground Screw and Cap Tether Strap
Seachoice Deck Mount Fill Plates combine excellent build quality and exceptional value in a replacement fill plate. This model is fabricated from c...
View full detailsAttwood 13" Snap-Lock Marine Seat Pedestal | 29130
13" Snap-Lock Marine Seat PedestalThis 13-inch snap-lock seat pedestal provides a secure, stable seating platform with the convenience of tool-free...
View full detailsTransat Stainless Steel Wire Rope Clip 3/8"
Transat Stainless Steel Wire Rope Clip — 3/8"A heavy-duty stainless steel wire rope clip sized for 3/8" wire rope. Used to form secure end terminat...
View full detailsWire Rope Clip 3/8" (1/CRD) – TMS-S-8800-10-P
WEST Wire Rope Clip – 3/8" (Single, 1/Card) Secure wire rope terminations with confidence using the WEST 3/8" Wire Rope Clip. Built for demanding m...
View full detailsGalvanized Bruce Type Anchor 20kg – TMS-Q91120G
The TR-STAIN Galvanized Bruce Type Anchor 20kg – TMS-Q91120G is a claw-style marine anchor designed for dependable setting and holding in common an...
View full detailsTR-STAIN Pad Eye – Diamond Base, 100mm – TMS-Q69216
TR-STAIN Pad Eye – Diamond Base, 100mm Add a strong, dependable attachment point with the TR-STAIN 100mm Diamond Base Pad Eye. Designed for...
View full detailsTITAN 7/16" Galvanized Anchor Shackle – (TIT-10319053)
TITAN 7/16" Galvanized Anchor Shackle Secure your anchoring and rigging setup with the TITAN 7/16" Galvanized Anchor Shackle. Built for dependable ...
View full detailsMarine Sealant 300ml Cartridge - Professional Grade Adhesive
Professional-grade marine sealant in a convenient 300ml cartridge designed for reliable bonding and sealing in marine applications. This high-perfo...
View full detailsEverflow Marine Aluminum Wiper Draw Assembly – 24" Sweep | EVM-3814WA2400N-P
Everflow Marine Aluminum Wiper Draw Assembly – 24" SweepKeep your helm visibility clear in any sea state. This aluminum wiper draw assembly is engi...
View full detailsEverflow Marine Aluminum Wiper Withdrawal Assembly – 12" Rigid | EVM-1212WA1200N-P
Everflow Marine Aluminum Wiper Withdrawal Assembly – 12" RigidA clean windscreen starts with a wiper arm that works every time. This rigid aluminum...
View full detailsSea-Dog Bronze Eye - Marine Deck Hardware Fitting
Sea-Dog bronze eye fitting designed for versatile marine deck hardware applications. This durable bronze fitting provides a reliable attachment poi...
View full detailsLewmar Hatch Trim and Screen Kit Size 40 White 367640252
Lewmar 367640252 is a genuine Size 40 hatch trim and screen kit in white, used to finish the inside of a Lewmar hatch installation with a cleaner i...
View full detailsMarine Back Door/Window Latch Kit - 4-Piece Set
Marine Back Door/Window Latch Kit - 4-Piece SetComplete latch kit for securing marine doors, hatches, and windows. This 4-piece set provides reliab...
View full details"Rail Support Base for ""Store-All"" Cases Ø2-23/64 x 1-49/64''(6x4,5cm) - Graphite"
This support allows you to mount the “Store-All” Cases semi-permanently on the rails. All you have to do is mount the support on the rails and then...
View full detailsSwim Platform - 25mm (63/64") Tube - 270mm x 390mm (10-5/8" x 15-23/64") - Stainless Steel 316
Stainless Steel Swim Platform - 25mm Tube - 270mm x 390mmPremium marine swim platform crafted from corrosion-resistant 316 stainless steel with 25m...
View full detailsLALIZAS Rail Mounting Kit - for Lifebuoy Ring Container - Stainless Steel Bracket
LALIZAS Rail Mounting Kit - for Lifebuoy Ring Container - Stainless Steel BracketHeavy-duty rail mounting bracket designed specifically for LALIZAS...
View full detailsLALIZAS Pole Mounting Kit - for Lifebuoy Ring Container with Door - Stainless Steel
LALIZAS Pole Mounting Kit - for Lifebuoy Ring Container with Door - Stainless SteelHeavy-duty pole mounting bracket designed specifically for LALIZ...
View full detailsFuel Valve Holding Bracket - Marine-Grade Pair
Premium Fuel Valve Holding Bracket - Marine-Grade PairThese professional-grade fuel valve holding brackets provide secure mounting and support for ...
View full detailsSwim Platform - 25mm (63/64") Tube - 210mm x 390mm (8-17/64" x 15-23/64") - Stainless Steel 316
Stainless Steel Swim Platform - 25mm Tube - 210mm x 390mmPremium marine swim platform crafted from corrosion-resistant 316 stainless steel with 25m...
View full detailsSwim Platform - 600mm x 550mm (23-5/8" x 21-21/32") - Stainless Steel 316
Stainless Steel Swim Platform - 600mm x 550mmPremium large marine swim platform crafted from corrosion-resistant 316 stainless steel. This spacious...
View full detailsSwim Platform - 450mm x 500mm (17-23/32" x 19-11/16") - Stainless Steel 316
Stainless Steel Swim Platform - 450mm x 500mmPremium marine swim platform crafted from corrosion-resistant 316 stainless steel. This spacious platf...
View full detailsSwim Platform - 450mm x 390mm (17-23/32" x 15-23/64") - Stainless Steel 316
Stainless Steel Swim Platform - 450mm x 390mmPremium marine swim platform crafted from corrosion-resistant 316 stainless steel. This spacious platf...
View full detailsCompact Electric Horn - Chrome Plated Marine Grade
Premium Marine Electric HornExperience reliable audible signaling with this compact, chrome-plated electric horn designed for marine environments. ...
View full detailsTrumpet Electric Horn - Chrome Plated Marine Grade
Premium Marine Trumpet HornCommand attention on the water with this powerful trumpet-style electric horn featuring a durable chrome-plated finish. ...
View full detailsCompact Electric Horn - White Marine Grade
Premium Marine Electric Horn - White FinishExperience reliable audible signaling with this compact, white-finished electric horn designed for marin...
View full detailsTrumpet Electric Horn - White Marine Grade
Premium Marine Trumpet Horn - White FinishCommand attention on the water with this powerful trumpet-style electric horn featuring a durable white f...
View full detailsFlush Mount Electric Horn - Low Profile Marine Grade
Premium Flush Mount Marine HornAchieve a sleek, streamlined look with this flush mount electric horn designed for modern marine installations. This...
View full detailsLofrans' Floating Winch Handle 9.8" (25cm) - Marine Grade Aluminum
Premium Floating Winch Handle by Lofrans'Never lose your winch handle overboard again with the Lofrans' Floating Winch Handle. Engineered with buoy...
View full detailsLofrans' Floating Winch Handle 10" (25cm) - Marine Grade Aluminum
Premium Floating Winch Handle by Lofrans'Never lose your winch handle overboard again with the Lofrans' Floating Winch Handle. Engineered with buoy...
View full detailsLofrans' Floating Winch Handle 8" (20cm) - Marine Grade Aluminum
Premium Floating Winch Handle by Lofrans'Never lose your winch handle overboard again with the Lofrans' Floating Winch Handle. Engineered with buoy...
View full detailsLofrans' Floating Winch Handle with Lock 9.8" (25cm) - Marine Grade Aluminum
Premium Floating Winch Handle with Lock by Lofrans'Never lose your winch handle overboard again with the Lofrans' Floating Winch Handle with Lock. ...
View full detailsLofrans' Floating Winch Handle with Lock 8" (20cm) - Marine Grade Aluminum
Premium Floating Winch Handle with Lock by Lofrans'Never lose your winch handle overboard again with the Lofrans' Floating Winch Handle with Lock. ...
View full detailsMooring Ring Ø6-34/64" (166mm) - Heavy-Duty Marine Mooring Hardware
Heavy-Duty Marine Mooring RingSecure your vessel with the OCEAN Mooring Ring, engineered for reliable mooring and anchoring applications. This heav...
View full detailsLALIZAS Hatch Ventilating System 4D Windtrap - 12" x 12" x 32" (300 x 300 x 800 mm) Silver/Blue
LALIZAS 4D Windtrap Hatch Ventilation System - StandardAdvanced 4D Windtrap hatch ventilation system by LALIZAS designed to maximize airflow while ...
View full detailsLALIZAS Adjustable Stainless Steel Liferaft Support Base - 316 Marine Grade
Professional Adjustable Liferaft Support Base - Stainless Steel 316The LALIZAS Adjustable Stainless Steel Liferaft Support Base is a professional-g...
View full detailsTelescopic Boat Hook Paddle - Black Aluminum, 61-27/64" to 88-37/64" (156-225cm)
Premium Telescopic Boat Hook with Integrated PaddleEngineered for reliability when you need it most. This professional-grade telescopic boat hook c...
View full detailsMarine Welcome Mat - Blue PVC with Firm Backing, 23-5/8" x 35-7/16" (60x90cm)
Heavy-Duty Marine Welcome MatPurpose-built for the demanding marine environment. This professional-grade welcome mat combines a firm PVC backing wi...
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