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
Phillips Machine Screw - Pan Head. 10-24 x 1/2"
Phillips machine screw - pan head, 10-24 thread, 1/2" length. Made from 18-8 stainless steel for corrosion resistance.Compatible ApplicationsGenera...
View full detailsPhillips Machine Screw - Oval Head, 8-32 x 1/2"
Phillips machine screw with an oval head, 8-32 thread, and 1/2 inch length. Made from 18-8 stainless steel for durability and corrosion resistance....
View full detailsCap Screw - Hex Head, 3/8"-16 x 4"
Hex-head cap screw designed for secure fastening in metal assemblies. Made from 18-8 stainless steel for corrosion resistance and durability.Compat...
View full detailsPhillips Machine Screw - Flat Head, 8-32 x 1/2"
Phillips machine screw with a flat head, 8-32 thread, 1/2" long. Made from 18-8 stainless steel for corrosion resistance.Compatible Applications: G...
View full detailsPhillips Machine Screw - Flat Head, 1/4"-20 x 3/4"
Phillips machine screw, flat head, 1/4"-20 thread, 3/4" length. Made from 18-8 stainless steel for corrosion resistance in metal assemblies. Mater...
View full detailsCap Screw - Hex Head, 3/8"-16 x 3-1/2"
Cap Screw - Hex Head, 3/8"-16 x 3-1/2" is manufactured from 18-8 stainless steel for corrosion resistance and durable performance in wet or outdoor...
View full detailsCap Screw - Hex Head, 5/8"-11 x 6"
Hex head cap screw crafted from 18-8 stainless steel for durable, corrosion-resistant fastening in outdoor and marine environments.Size: 5/8"-11 x ...
View full detailsCap Screw - Hex Head, 5/8"-11 x 5"
Cap Screw - Hex Head, 5/8\"-11 x 5\" is a bulk fastener crafted from 18-8 stainless steel for strength and corrosion resistance. This hex-head cap ...
View full detailsPhillips Machine Screw - Flat Head, 1/4"-20 x 1"
Phillips Machine Screw - Flat Head, 1/4"-20, 1" long. Made from 18-8 stainless steel for corrosion resistance and durability.Use this flat-head scr...
View full detailsPhillips Machine Screw - Flat Head, 8-32 x 3/4"
Flat head Phillips machine screw in 18-8 stainless steel for corrosion resistance. Size 8-32, length 3/4 inch. Ideal for general fastening tasks th...
View full detailsCap Screw - Hex Head, 3/8"-16 x 1-1/2"
Cap Screw with a hex head, crafted in 18-8 stainless steel for corrosion resistance. The bulk fastener is suitable for general mounting tasks where...
View full detailsCap Screw - Hex Head, 5/8"-11 x 2-1/2"
Hex head cap screw in 18-8 stainless steel provides corrosion resistance for general fastening tasks. Size 5/8\"-11 with a 2-1/2\" length, suitable...
View full detailsCap Screw - Hex Head, 3/8"-16 x 3"
Cap Screw - Hex Head, 3/8-16 x 3 in. This cap screw is manufactured in 18-8 stainless steel for lasting corrosion resistance in challenging environ...
View full detailsCap Screw - Hex Head, 3/8"-16 x 2-1/2"
Cap screw with a hex head for reliable, easy-drive fastening. This fastener features a 3/8"-16 UNC thread and measures 2-1/2" in length, made from ...
View full detailsLag Screw, 1/4 x 1-1/2"
Lag Screw, 1/4 x 1-1/2" in 18-8 stainless steel for corrosion-resistant fastenings.Bulk fastener for woodworking projects where stainless steel per...
View full detailsCap Screw - Hex Head, 3/8"-16 x 1"
Hex head cap screw crafted from 18-8 stainless steel for improved corrosion resistance in marine and outdoor environments.Designed for bulk fastene...
View full detailsCap Screw - Hex Head, 3/8"-16 x 1-3/4"
Cap Screw - Hex Head, 3/8"-16 x 1-3/4". Made from 18-8 stainless steel for enhanced corrosion resistance and durability. Material: 18-8 stainles...
View full detailsCap Screw - Hex Head, 3/8"-16 x 2"
Cap Screw - Hex Head, 3/8\"-16 x 2\". This hex-head cap screw is made from 18-8 stainless steel for durability and corrosion resistance.Details Mat...
View full detailsCarriage Bolt, 1/2"-13 x 5"
Carriage Bolt, 1/2"-13 x 5" in 18-8 stainless steel for corrosion resistance. Ideal for bulk fastener projects needing a durable, stainless carriag...
View full detailsCarriage Bolt, 1/2"-13 x 6"
Carriage bolt, 18-8 stainless steel for durable, corrosion-resistant fastening in general-purpose projects. General-purpose fastening for wood-to-w...
View full detailsCap Screw - Hex Head, 5/8"-11 x 2"
Cap Screw with a hex head, sized 5/8"-11 thread and 2" long. Constructed from 18-8 stainless steel for corrosion resistance.Ideal for bulk fastener...
View full detailsCap Screw - Hex Head, 3/8"-16 x 1-1/4"
Cap Screw - Hex Head, 3/8\"-16 x 1-1/4\"18-8 stainless steel for corrosion resistance and durability.Compatible Applications: General fastening tas...
View full detailsLag Screw, 1/4 x 1"
Lag Screw, 1/4 x 1" — 18-8 Stainless Steel.Compatible Applications: Bulk fastener projects Wood-to-wood connections Usage notes:Follow proper pilot...
View full detailsCap Screw - Hex Head, 3/8"-16 x 3/4"
Cap Screw - Hex Head, 3/8"-16 x 3/4".Made from 18-8 stainless steel for corrosion resistance in moisture-prone or marine environments.Compatible Ap...
View full detailsPhillips Machine Screw - Flat Head, 10-32 x 1-1/2"
Flat head Phillips machine screw, size 10-32 x 1-1/2 inches. Material: 18-8 Stainless Steel. General fastening and mounting projects requiring 10-3...
View full detailsCap Screw - Hex Head, 5/16"-18 x 3"
Cap Screw - Hex Head, 5/16"-18 x 3"Made from 18-8 stainless steel for durable, corrosion-resistant performance. Hex head design provides easy drive...
View full detailsCarriage Bolt, 1/2"-13 x 4"
Carriage Bolt, size 1/2-13 x 4. Made with 18-8 stainless steel for durability.Compatible Applications: Wood-to-wood fastenings for outdoor projects...
View full detailsCap Screw - Hex Head, 5/16"-18 x 4-1/2"
Cap screw with hex head. Size: 5/16-18, length 4-1/2 inches. Material: 18-8 stainless steel for corrosion resistance.Ideal for general fastening an...
View full detailsCap Screw - Hex Head, 1/2"-13 x 6"
Cap Screw with a hex head for quick drive and secure fastening. Size: 1/2"-13 x 6". Material: 18-8 stainless steel for corrosion resistance.Parts D...
View full detailsCap Screw - Hex Head, 5/16"-18 x 4"
Cap Screw with hex head, 5/16"-18 thread, 4" long. Made from 18-8 stainless steel for corrosion resistance in general fastening projects.Best use: ...
View full detailsCap Screw - Hex Head, 5/16"-18 x 3-1/2"
Hex head cap screw, 5/16\"-18 UNC, 3-1/2\" long. Made from 18-8 stainless steel for corrosion resistance and durability.Compatible Applications: Bu...
View full detailsCap Screw - Hex Head, 5/16"-18 x 5"
Cap Screw - Hex Head, 5/16\"-18 x 5\" in 18-8 stainless steel for corrosion resistance and durability. Material: 18-8 stainless steel Head: Hex Thr...
View full detailsCarriage Bolt, 1/2"-13 x 3"
Carriage bolt, 1/2\" diameter with 13 threads per inch, 3\" long. Made from 18-8 stainless steel for corrosion resistance. Bulk fastener suitable f...
View full detailsLag Screw, 1/2 x 6"
Lag Screw made from 18-8 stainless steel for corrosion-resistant performance in bulk fastener applications.Ideal for general mounting and joining t...
View full detailsCap Screw - Hex Head, 1/2"-13 x 4-1/2"
Cap Screw - Hex Head, 1/2"-13 x 4-1/2" in 18-8 stainless steel. Hex head cap screw provides reliable, corrosion-resistant fastening for demanding e...
View full detailsCap Screw - Hex Head, 5/16"-18 x 1-3/4"
Cap Screw with hex head, 5/16\"-18 x 1-3/4\". Made from 18-8 stainless steel for corrosion resistance and durability.Compatible Applications Genera...
View full detailsCap Screw - Hex Head, 5/16"-18 x 2"
Cap Screw - Hex Head, 5/16\"-18 x 2\". Made from 18-8 stainless steel for general-purpose fastening.Compatible Applications General-purpose fasteni...
View full detailsCap Screw - Hex Head, 5/16"-18 x 2-1/2"
Cap Screw - Hex Head, 5/16"-18 x 2-1/2". Made from 18-8 stainless steel for corrosion resistance and durable strength. Thread: 5/16"-18; Length: 2-...
View full detailsLag Screw, 1/2 x 4"
Lag Screw, 1/2 x 4 inches, fashioned in 18-8 stainless steel for corrosion resistance.General-purpose lag screw suitable for bulk fastener projects...
View full detailsLag Screw, 1/2 x 5"
Lag Screw, 1/2 in diameter x 5 in long, crafted in 18-8 stainless steel for durable, corrosion-resistant wood fastening.Compatible Applications: Wo...
View full detailsCap Screw - Hex Head, 1/2"-13 x 5"
Cap Screw - Hex Head, 1/2"-13 x 5". Made from 18-8 stainless steel for dependable strength and corrosion resistance.Designed for bulk fastening pro...
View full detailsCap Screw - Hex Head, 5/16"-18 x 1-1/2"
Cap Screw - Hex Head, 5/16\"-18 x 1-1/2\". This hex-head cap screw is made from 18-8 stainless steel for corrosion resistance and durability in bul...
View full detailsCap Screw - Hex Head, 1/2"-13 x 3-1/2"
Cap Screw - Hex Head, 1/2\"-13 x 3-1/2\" in 18-8 stainless steel. Hex head cap screw designed for reliable fastening in bulk-fastener and mounting ...
View full detailsCarriage Bolt, 3/8"-16 x 6"
Carriage bolt, 3/8\" diameter, 16 threads per inch and 6\" length. Made from 18-8 stainless steel for corrosion resistance.Compatible Applications ...
View full detailsCap Screw - Hex Head, 1/2"-13 x 4"
Cap Screw - Hex Head, 1/2\"-13 x 4\". 18-8 Stainless Steel for durable corrosion resistance in demanding environments. Bulk fastener application...
View full detailsCarriage Bolt, 3/8"-16 x 3-1/2"
Corrosion-resistant carriage bolt crafted from 18-8 stainless steel for durability in outdoor and marine environments.Designed for joint applicatio...
View full detailsCarriage Bolt, 3/8"-16 x 5"
Carriage bolt, 3/8"-16 x 5", in 18-8 stainless steel.Perfect for bulk fastener needs where a nut on the opposite side secures the bolt. The 18-8 st...
View full detailsCap Screw - Hex Head, 5/16"-18 x 1-1/4"
Cap Screw with hex head, 5/16\"-18 thread, 1-1/4\" length. Made from 18-8 stainless steel for corrosion resistance.Compatible Applications: Marine ...
View full details