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
Cap Screw - Hex Head, 1/2"-13 x 2-1/2"
Cap Screw - Hex Head, 1/2"-13 x 2-1/2". Made from 18-8 stainless steel for corrosion resistance and long service life in a variety of environments....
View full detailsLag Screw, 1/2 x 3-1/2"
Lag screw, 1/2 x 3-1/2 inches, crafted from 18-8 stainless steel for corrosion resistance in outdoor and marine environments. Wood-to-wood faste...
View full detailsCarriage Bolt, 3/8"-16 x 4"
Carriage Bolt, 3/8\"-16 x 4\" in 18-8 stainless steel (304). The rounded head provides a clean finish and the square neck helps prevent turning dur...
View full detailsLag Screw, 1/2 x 3"
Lag Screw, 1/2 x 3". Made from 18-8 stainless steel, this lag screw provides reliable corrosion resistance for wood fastening projects.Parts Desk I...
View full detailsCap Screw - Hex Head, 1/2"-13 x 3"
Cap screw with hex head, 1/2"-13 x 3". Made from 18-8 stainless steel for corrosion resistance and durable performance in demanding environments.Co...
View full detailsCap Screw - Hex Head, 5/16"-18 x 3/4"
Cap Screw with Hex Head in size 5/16\"-18 by 3/4\" (thread: 5/16-18).Made from 18-8 stainless steel for corrosion resistance, ideal for bulk fasten...
View full detailsCap Screw - Hex Head, 5/16"-18 x 1"
Cap Screw - Hex Head, 5/16\"-18 x 1\". Made from 18-8 stainless steel for reliable corrosion resistance. Hex-head cap screw size 5/16\"-18 with 1\"...
View full detailsCap Screw - Hex Head, 1/2"-13 x 1-3/4"
Cap Screw with hex head, 1/2"-13 thread, and 1-3/4" length. Made from 18-8 stainless steel for durable corrosion resistance.Details Hex he...
View full detailsCap Screw - Hex Head, 1/2"-13 x 2"
Hex head cap screw crafted from 18-8 stainless steel for reliable, corrosion-resistant fastening in bulk fastener projects.Designed for general mou...
View full detailsLag Screw, 3/8 x 6"
Lag Screw, 3/8 x 6" in 18-8 stainless steel for durable, corrosion-resistant fastening in wood-to-wood applications. Decks, outdoor structures, and...
View full detailsCarriage Bolt, 3/8"-16 x 3"
Carriage Bolt, 3/8-16 x 3" made from 18-8 stainless steel for corrosion resistance in challenging environments.Ideal for bulk fastener needs in mar...
View full detailsCap Screw - Hex Head, 5/16"-18 x 1/2"
Hex head cap screw in 18-8 stainless steel for durable, corrosion-resistant fastening. Size 5/16\"-18 x 1/2\" (thread 5/16\"-18, length 1/2\").Idea...
View full detailsLag Screw, 3/8 x 4"
Made from 18-8 stainless steel, this bulk lag screw delivers dependable strength and corrosion resistance for outdoor and marine wood fastening. Su...
View full detailsLag Screw, 3/8 x 3-1/2"
Lag Screw, 3/8 x 3-1/2 in. Constructed from 18-8 stainless steel for corrosion resistance in outdoor and damp environments.Key characteristics: 3/8...
View full detailsLag Screw, 3/8 x 5"
Lag Screw, 3/8 x 5". Constructed from 18-8 stainless steel for durable, corrosion-resistant performance in outdoor and marine environments.Compatib...
View full detailsCap Screw - Hex Head, 1/2"-13 x 1-1/2"
Hex head cap screw with 1/2\"-13 threads and 1-1/2\" length. Constructed from 18-8 stainless steel for durability and corrosion resistance.Compatib...
View full detailsCap Screw - Hex Head, 1/2"-13 x 1"
Cap Screw - Hex Head, 1/2\"-13 x 1\" in 18-8 stainless steel for durability in damp or exposed environments.Details Thread size: 1/2\"-13 Length: 1...
View full detailsPhillips Machine Screw - Flat Head, 10-24 x 1-1/2"
Phillips machine screw with a flat head, 10-24 thread, and a length of 1-1/2 inches. Made from 18-8 stainless steel for corrosion resistance and du...
View full detailsCap Screw - Hex Head, 1/2"-13 x 1-1/4"
Cap Screw - Hex Head, 1/2"-13 x 1-1/4". Crafted in 18-8 stainless steel for durable corrosion resistance in outdoor and marine environments. Thread...
View full detailsPhillips Machine Screw - Flat Head, 10-24 x 2"
Flat-head Phillips machine screw, #10-24 thread, 2 in long. Made from 18-8 stainless steel for corrosion resistance and durable performance in a ra...
View full detailsCap Screw - Hex Head, 1/4"-20 x 4"
Hex head cap screw in 18-8 stainless steel. Size: 1/4\"-20 thread, 4\" long. Provides durable, corrosion-resistant fastening for general applicatio...
View full detailsLag Screw, 3/8 x 2-1/2"
Lag Screw, 3/8 x 2-1/2 inches, crafted from 18-8 stainless steel for durable corrosion resistance in outdoor environments. Size: 3/8 in diameter...
View full detailsPhillips Machine Screw - Flat Head, 10-24 x 1-1/4"
Flat-head machine screw in 18-8 stainless steel for corrosion resistance in a variety of fastening projects. Phillips drive; size 10-24 x 1-1/4"Com...
View full detailsCap Screw - Hex Head, 1/2"-13 x 3/4"
Cap Screw - Hex Head, 1/2"-13 x 3/4". 18-8 Stainless Steel. General-purpose bulk fasteners for mounting hardware Suitable for marine and outdoor in...
View full detailsCap Screw - Hex Head, 7/16"-14 x 3"
A durable 18-8 stainless steel hex head cap screw for secure, reliable fastening in marine and general-use applications where corrosion resistance ...
View full detailsLag Screw, 3/8 x 3"
Lag Screw, 3/8 in diameter by 3 in long, constructed from 18-8 stainless steel for corrosion resistance.Ideal for timber-to-timber connections in o...
View full detailsPhillips Machine Screw - Flat Head, 10-24 x 1"
Secure marine and general fastening applications with this Phillips machine screw featuring a flat head profile and 10-24 thread size for a neat, f...
View full detailsCap Screw - Hex Head, 7/16"-14 x 4"
Cap Screw - Hex Head, 7/16\"-14 x 4\" in 18-8 stainless steel for corrosion resistance and durable use. Size: 7/16\"-14 thread Length: 4\" Head sty...
View full detailsLag Screw, 3/8 x 1"
Secure mounting starts with the right fastener. This lag screw is a 3/8 in. x 1 in. stainless steel hex-head lag screw made from 18-8 stainless ste...
View full detailsLag Screw, 3/8 x 2"
A durable 3/8" x 2" lag screw made from 18-8 stainless steel for fastening applications in marine and general hardware use. Key Features Size: 3/8...
View full detailsLag Screw, 3/8 x 1-1/2"
Secure marine hardware fast with this 3/8 x 1-1/2" lag screw made from 18-8 stainless steel. Ideal for fastening into wood or similar structural ma...
View full detailsCap Screw - Hex Head, 7/16"-14 x 3-1/2"
Cap Screw with a hex head for reliable driving in bulk-fastener applications. This 7/16"-14 thread cap screw measures 3-1/2" in length and is made ...
View full detailsPhillips Machine Screw - Flat Head, 10-24 x 3/4"
Phillips Machine Screw with a flat head for secure fastening with a #10-24 thread and 3/4" length. Made from 18-8 stainless steel for corrosion res...
View full detailsPhillips Machine Screw - Flat Head, 10-24 x 1/2"
Phillips machine screw with a flat head for clean, flush-style fastening. Built with 18-8 stainless steel corrosion resistance for marine and outdo...
View full detailsCap Screw - Hex Head, 7/16"-14 x 2"
Cap Screw - Hex Head, 7/16"-14 x 2" (50-00069) built for marine fastener applications where corrosion resistance matters. Made from 18-8 stainless ...
View full detailsCap Screw - Hex Head, 1/4"-20 x 2-1/2"
Use this hex head cap screw for secure fastening in marine and general hardware applications where a 1/4"-20 thread and 2-1/2" length are required....
View full detailsCap Screw - Hex Head, 1/4"-20 x 3"
A hex head cap screw sized 1/4"-20 x 3" with 18-8 stainless steel construction for dependable corrosion resistance on marine and outdoor hardware p...
View full detailsCap Screw - Hex Head, 1/4"-20 x 1-1/2"
Secure and stabilize marine and general mounting applications with this 18-8 stainless steel hex head cap screw (1/4"-20 x 1-1/2"). Designed for re...
View full detailsCap Screw - Hex Head, 7/16"-14 x 2-1/2"
A hex head cap screw sized for dependable marine-grade fastening—7/16"-14 x 2-1/2" in 18-8 stainless steel. Key Features Hex head cap screw for se...
View full detailsCap Screw - Hex Head, 1/4"-20 x 2"
A hex head cap screw designed for marine-style fastening needs—built with 18-8 stainless steel for corrosion resistance. Key Features Hex head des...
View full detailsLag Screw, 5/16 x 2-1/2"
A durable 18-8 stainless steel lag screw for fastening marine and hardware projects—ideal when corrosion resistance matters. Key Features Bulk fas...
View full detailsCap Screw - Hex Head, 1/4-20 x 1"
Cap Screw - Hex Head, 1/4-20 x 1" is a stainless-steel hex-head fastener designed for secure fastening in marine and general hardware applications ...
View full detailsCap Screw - Hex Head, 7/16"-14 x 1"
A reliable hex head cap screw for marine hardware and general fastener replacement, sized 7/16"-14 x 1" and made from 18-8 stainless steel for corr...
View full detailsCap Screw - Hex Head, 7/16"-14 x 1-1/2"
Fasten securely with this Seachoice hex head cap screw in 18-8 stainless steel, sized 7/16"-14 x 1-1/2" for reliable, corrosion-resistant fastening...
View full detailsCap Screw - Hex Head, 7/16"-14 x 1-1/4"
A durable hex head cap screw sized for fastening applications where 18-8 stainless steel corrosion resistance is desired. Key Features Hex head ca...
View full detailsPhillips Machine Screw - Flat Head, 8-32 x 1-1/2"
A Phillips flat-head machine screw in 8-32 x 1-1/2", made from 18-8 stainless steel for durable, corrosion-resistant fastening. Key Features Phill...
View full detailsCap Screw - Hex Head, 1/4"-20 x 1-1/4"
This Seachoice hex head cap screw (1/4"-20 x 1-1/4") is made from 18-8 stainless steel—an excellent choice for marine and exterior fastening where ...
View full detailsLag Screw, 5/16 x 3"
Secure marine and outdoor mounting with this 5/16 x 3" lag screw made from 18-8 stainless steel. Designed for strong fastening where corrosion resi...
View full details