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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 ShopFitmentHardware TypesInstall NotesInspectionFAQDeck HardwareTools

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.

SS

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

Filters

Top Line Marine Hatch with Lock - White 14-9/16" x 14-49/64" (370 x 375 mm)

$141.39 - $141.39
$141.39
$141.39 - $141.39
$141.39
Only 5 left!

Top Line Marine Deck Hatch with Integrated Lock - White FinishPremium marine deck hatch with integrated locking mechanism for enhanced security. Th...

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$141.39 - $141.39
$141.39
$141.39 - $141.39
$141.39

Top Line Marine Hatch - White 14-9/16" x 14-49/64" (370 x 375 mm) ISO12216

$104.24 - $104.24
$104.24
$104.24 - $104.24
$104.24
6 in stock

Top Line Marine Deck Hatch - White Finish - ISO12216 CertifiedPremium ISO12216-certified marine deck hatch offering the highest level of access, ve...

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$104.24 - $104.24
$104.24
$104.24 - $104.24
$104.24

Top Line Marine Hatch with Lock - White 9-9/16" x 23-57/64" (243 x 607 mm)

$196.06 - $196.06
$196.06
$196.06 - $196.06
$196.06
8 in stock

Top Line Marine Deck Hatch with Integrated Lock - White FinishPremium marine deck hatch with integrated locking mechanism for enhanced security. Th...

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$196.06 - $196.06
$196.06
$196.06 - $196.06
$196.06

Top Line Marine Hatch - Grey 14" x 24" (353 x 606 mm) ISO12216

$155.54 - $155.54
$155.54
$155.54 - $155.54
$155.54
10 in stock

Top Line Marine Deck Hatch - Grey Finish - ISO12216 CertifiedPremium ISO12216-certified marine deck hatch offering the highest level of access, ven...

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$155.54 - $155.54
$155.54
$155.54 - $155.54
$155.54
Sold out

Top Line Storage Hatch with Lock - White 13-57/64" x 23-55/64" (353 x 606 mm)

$636.24 - $636.24
$636.24
$636.24 - $636.24
$636.24
Out of stock

Top Line Marine Storage Hatch with Integrated Lock - White FinishPremium marine storage hatch with integrated locking mechanism for secure below-de...

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$636.24 - $636.24
$636.24
$636.24 - $636.24
$636.24
Sold out
Sold out

Top Line Marine Hatch with Lock - White 13-57/64" x 23-55/64" (353 x 606 mm)

$196.06 - $196.06
$196.06
$196.06 - $196.06
$196.06
Out of stock

Top Line Marine Deck Hatch with Integrated Lock - White FinishPremium marine deck hatch with integrated locking mechanism for enhanced security. Th...

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$196.06 - $196.06
$196.06
$196.06 - $196.06
$196.06
Sold out

Top Line Marine Hatch with Lock - White 12-13/32" x 17-21/64" (315 x 440 mm)

$163.60 - $163.60
$163.60
$163.60 - $163.60
$163.60
10 in stock

Top Line Marine Deck Hatch with Integrated Lock - White FinishPremium marine deck hatch with integrated locking mechanism for enhanced security. Th...

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$163.60 - $163.60
$163.60
$163.60 - $163.60
$163.60

Top Line Marine Hatch - White 12-13/32" x 17-21/64" (315 x 440 mm) ISO12216

$123.13 - $123.13
$123.13
$123.13 - $123.13
$123.13
10 in stock

Top Line Marine Deck Hatch - White Finish - ISO12216 CertifiedPremium ISO12216-certified marine deck hatch offering the highest level of access, ve...

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$123.13 - $123.13
$123.13
$123.13 - $123.13
$123.13
Sold out

Top Line Storage Hatch with Lock - White 10-5/8" x 14-49/64" (270 x 375 mm)

$487.78 - $487.78
$487.78
$487.78 - $487.78
$487.78
Out of stock

Top Line Marine Storage Hatch with Integrated Lock - White FinishPremium marine storage hatch with integrated locking mechanism for secure below-de...

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$487.78 - $487.78
$487.78
$487.78 - $487.78
$487.78
Sold out

Top Line Marine Hatch with Lock - White 10-5/8" x 14-49/64" (270 x 375 mm)

$114.93 - $114.93
$114.93
$114.93 - $114.93
$114.93
10 in stock

Top Line Marine Deck Hatch with Integrated Lock - White FinishPremium marine deck hatch with integrated locking mechanism for enhanced security. Th...

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$114.93 - $114.93
$114.93
$114.93 - $114.93
$114.93

Top Line Marine Hatch - White 10-5/8" x 14-49/64" (270 x 375 mm) ISO12216

$81.14 - $81.14
$81.14
$81.14 - $81.14
$81.14
29 in stock

Top Line Marine Deck Hatch - White Finish - ISO12216 CertifiedPremium ISO12216-certified marine deck hatch offering the highest level of access, ve...

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$81.14 - $81.14
$81.14
$81.14 - $81.14
$81.14

Floating Boat Hook - Anodised Aluminum - Ø25mm (63/64") - 94.5" (240cm) - Black

$53.02 - $53.02
$53.02
$53.02 - $53.02
$53.02
14 in stock

Maximum-Reach Floating Boat Hook - Anodised Aluminum ConstructionThis professional-grade 94.5-inch (240cm) floating boat hook features durable anod...

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$53.02 - $53.02
$53.02
$53.02 - $53.02
$53.02

Floating Boat Hook - Anodised Aluminum - Ø25mm (63/64") - 70.9" (180cm) - Black

$35.31 - $35.31
$35.31
$35.31 - $35.31
$35.31
16 in stock

Extended-Reach Floating Boat Hook - Anodised Aluminum ConstructionThis professional-grade 70.9-inch (180cm) floating boat hook features durable ano...

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$35.31 - $35.31
$35.31
$35.31 - $35.31
$35.31

Floating Boat Hook - Anodised Aluminum - Ø25mm (63/64") - 47.25" (120cm) - Black

$29.77 - $29.77
$29.77
$29.77 - $29.77
$29.77
17 in stock

Premium Floating Boat Hook - Anodised Aluminum ConstructionThis professional-grade 47.25-inch (120cm) floating boat hook features durable anodised ...

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$29.77 - $29.77
$29.77
$29.77 - $29.77
$29.77

Set of 3 Padlocks w/ long shackle, SeaLock, 1-3/16''(30mm), w/ joint key

$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95
36 in stock

Premium marine-grade padlock set with extended shackles, engineered for maximum corrosion resistance in harsh saltwater environments. This 3-pack f...

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$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95

Set of 5 Padlocks,SeaLock, 1-3/16''(30mm), w/ joint key

$106.81 - $106.81
$106.81
$106.81 - $106.81
$106.81
32 in stock

Premium marine-grade padlock set engineered for maximum corrosion resistance in harsh saltwater environments. This 5-pack features keyed-alike conv...

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$106.81 - $106.81
$106.81
$106.81 - $106.81
$106.81

Net Storage,White, Thick 25/64'' (10mm), 4-46/64 x 8-5/64'' (120 mmx205mm)

$18.72 - $18.72
$18.72
$18.72 - $18.72
$18.72
38 in stock

Compact low-profile net storage case designed to organize small items and keep essentials within easy reach. Features UV-resistant plastic construc...

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$18.72 - $18.72
$18.72
$18.72 - $18.72
$18.72

Net Storage,White, Thick 50/64'' (20mm), 4-46/64 x 8-5/64'' (120mmx205mm)

$20.80 - $20.80
$20.80
$20.80 - $20.80
$20.80
41 in stock

Versatile net storage case designed to organize small items and keep essentials within easy reach. Features UV-resistant plastic construction with ...

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$20.80 - $20.80
$20.80
$20.80 - $20.80
$20.80

Lofrans' Winch Handle, Anodised Aluminium, with lock and speed handle, 10'' (25 cm), Black

$88.33 - $88.33
$88.33
$88.33 - $88.33
$88.33
14 in stock

Premium Lofrans winch handle combining extended length for maximum leverage with ball-bearing speed handle technology. Engineered for effortless, h...

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$88.33 - $88.33
$88.33
$88.33 - $88.33
$88.33

Lofrans' Winch Handle, Anodised Aluminium, with lock, 9-27/32''(25cm), Black

$80.11 - $80.11
$80.11
$80.11 - $80.11
$80.11
20 in stock

Premium Lofrans winch handle engineered for maximum leverage and efficient operation. Constructed from lightweight anodised aluminium with integrat...

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$80.11 - $80.11
$80.11
$80.11 - $80.11
$80.11

Lofrans' Winch Handle, Anodised Aluminium, with lock and speed handle, 8'' (20 cm), Black

$85.38 - $85.38
$85.38
$85.38 - $85.38
$85.38
12 in stock

Premium Lofrans winch handle featuring integrated locking mechanism and ball-bearing speed handle for effortless, high-efficiency operation. Constr...

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$85.38 - $85.38
$85.38
$85.38 - $85.38
$85.38

Lofrans' Winch Handle, Anodised Aluminium, with lock, 7-7/8''(20cm), Black

$77.34 - $77.34
$77.34
$77.34 - $77.34
$77.34
11 in stock

Premium Lofrans winch handle engineered for efficient operation with minimal effort. Constructed from lightweight anodised aluminium with integrate...

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$77.34 - $77.34
$77.34
$77.34 - $77.34
$77.34

Industrial Marine Inspection Hatch with Detachable Cover - White Internal Ø7" (155 mm)

$39.67 - $39.67
$39.67
$39.67 - $39.67
$39.67
20 in stock

Industrial Marine Inspection Hatch - White FinishHeavy-duty industrial-grade marine inspection hatch featuring a detachable cover for robust access...

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$39.67 - $39.67
$39.67
$39.67 - $39.67
$39.67

INDUSTRIAL Inspection Hatch - 132mm (6") Internal Diameter - Detachable Cover - White

$35.85 - $35.85
$35.85
$35.85 - $35.85
$35.85
20 in stock

INDUSTRIAL Inspection Hatch - 132mm (6") - Detachable Cover - WhitePremium inspection hatch with detachable cover made from tough plastic for extra...

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$35.85 - $35.85
$35.85
$35.85 - $35.85
$35.85

INDUSTRIAL Inspection Hatch - 100mm (4") Internal Diameter - Detachable Cover - White

$28.54 - $28.54
$28.54
$28.54 - $28.54
$28.54
20 in stock

INDUSTRIAL Inspection Hatch - 100mm (4") - Detachable Cover - WhitePremium inspection hatch with detachable cover made from tough plastic for extra...

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$28.54 - $28.54
$28.54
$28.54 - $28.54
$28.54

INDUSTRIAL Access Hatch - 316x360mm (12-7/16" x 14-3/16") - Detachable Cover - Grey

$71.99 - $71.99
$71.99
$71.99 - $71.99
$71.99
15 in stock

INDUSTRIAL Access Hatch - 316x360mm - Detachable Cover - GreyPremium access hatch with completely detachable cover made from tough UV-resistant pol...

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$71.99 - $71.99
$71.99
$71.99 - $71.99
$71.99

INDUSTRIAL Access Hatch - 316x360mm (12-7/16" x 14-3/16") - Detachable Cover - White

$71.99 - $71.99
$71.99
$71.99 - $71.99
$71.99
15 in stock

INDUSTRIAL Access Hatch - 316x360mm - Detachable Cover - WhitePremium access hatch with completely detachable cover made from tough UV-resistant po...

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$71.99 - $71.99
$71.99
$71.99 - $71.99
$71.99

INDUSTRIAL Inspection Hatch - 10" (254mm) Internal Diameter - Grey

$86.53 - $86.53
$86.53
$86.53 - $86.53
$86.53
16 in stock

INDUSTRIAL Marine Inspection Hatch - 10" (254mm)Premium marine inspection hatch designed for easy access to fuel lines, electrical cables, gauges, ...

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$86.53 - $86.53
$86.53
$86.53 - $86.53
$86.53

INDUSTRIAL Inspection Hatch - 10" (254mm) Internal Diameter - White

$86.53 - $86.53
$86.53
$86.53 - $86.53
$86.53
16 in stock

INDUSTRIAL Marine Inspection Hatch - 10" (254mm)Premium marine inspection hatch designed for easy access to fuel lines, electrical cables, gauges, ...

View full details
$86.53 - $86.53
$86.53
$86.53 - $86.53
$86.53

INDUSTRIAL Inspection Hatch - 8" (201mm) Internal Diameter - Grey

$63.63 - $63.63
$63.63
$63.63 - $63.63
$63.63
20 in stock

INDUSTRIAL Marine Inspection Hatch - 8" (201mm)Premium marine inspection hatch designed for easy access to fuel lines, electrical cables, gauges, c...

View full details
$63.63 - $63.63
$63.63
$63.63 - $63.63
$63.63

INDUSTRIAL Inspection Hatch - 8" (201mm) Internal Diameter - White

$63.63 - $63.63
$63.63
$63.63 - $63.63
$63.63
20 in stock

INDUSTRIAL Marine Inspection Hatch - 8" (201mm)Premium marine inspection hatch designed for easy access to fuel lines, electrical cables, gauges, c...

View full details
$63.63 - $63.63
$63.63
$63.63 - $63.63
$63.63

Key Hole Plate - Stainless Steel - Marine Hardware - Mounting Bracket

$7.49 - $7.49
$7.49
$7.49 - $7.49
$7.49
12 in stock

Premium Stainless Steel Key Hole Plate - Marine Mounting HardwareThis professional-grade key hole plate provides secure, versatile mounting for mar...

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$7.49 - $7.49
$7.49
$7.49 - $7.49
$7.49
Sea-Dog 6714951 Heavy Duty Coat Hook, Stainless Steel

Sea-Dog 6714951 Heavy Duty Coat Hook, Stainless Steel

$73.79 - $73.79
$73.79
$73.79 - $73.79
$73.79
Item locally warehoused

Heavy Duty Coat Hook creates a great securing point for storing gear. Constructed of corrosion resistant investment cast 316 stainless steel. Insta...

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$73.79 - $73.79
$73.79
$73.79 - $73.79
$73.79
Sea-Dog 6715101 Double Coat Hook - Chrome/Brass

Sea-Dog 6715101 Double Coat Hook - Chrome/Brass

$34.29 - $34.29
$34.29
$34.29 - $34.29
$34.29
Item locally warehoused

Double Coat Hook installs with two #6 FH fasteners (not included).Sand cast brass construction.

$34.29 - $34.29
$34.29
$34.29 - $34.29
$34.29
Replacement Cap Waste-Black

Replacement Cap Waste-Black

$31.89 - $31.89
$31.89
$31.89 - $31.89
$31.89
Item locally warehoused

Replacement Cap Waste-Black

$31.89 - $31.89
$31.89
$31.89 - $31.89
$31.89
Seadog 6714601 Hammock Hooks - Stainless, 2/cd

Seadog 6714601 Hammock Hooks - Stainless, 2/cd

$6.89 - $6.89
$6.89
$6.89 - $6.89
$6.89
Item locally warehoused

Hammock Hooks are designed with an extra bend for additional holding power. Ideal for fender and lashing hook applications. Corrosion resistant sta...

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$6.89 - $6.89
$6.89
$6.89 - $6.89
$6.89
Perko 1309DP0CHR Snap Type Fender Hooks, 2/pk

Perko 1309DP0CHR Snap Type Fender Hooks, 2/pk

$40.19 - $40.19
$40.19
$40.19 - $40.19
$40.19
Item locally warehoused

Chrome plated zinc.

$40.19 - $40.19
$40.19
$40.19 - $40.19
$40.19
Sea-Dog 6715001 Single Coat Hook - Small, Chromme/Brass, pr.

Sea-Dog 6715001 Single Coat Hook - Small, Chromme/Brass, pr.

$27.19 - $27.19
$27.19
$27.19 - $27.19
$27.19
Item locally warehoused

Sand cast brass construction.Chrome/brass.

$27.19 - $27.19
$27.19
$27.19 - $27.19
$27.19
Sea-Dog 671515 Double Coat Hook - Brass

Sea-Dog 671515 Double Coat Hook - Brass

$31.49 - $31.49
$31.49
$31.49 - $31.49
$31.49
Item locally warehoused

Double Coat Hook installs with two #6 FH fasteners (not included).Sand cast brass construction.

$31.49 - $31.49
$31.49
$31.49 - $31.49
$31.49
Sea-Dog 6715011 Single Coat Hook - Large, Chrome/Brass, pr.

Sea-Dog 6715011 Single Coat Hook - Large, Chrome/Brass, pr.

$27.69 - $27.69
$27.69
$27.69 - $27.69
$27.69
Item locally warehoused

Large Single Coat Hook installs with two #6 FH fasteners (not included).Sand cast brass construction.

$27.69 - $27.69
$27.69
$27.69 - $27.69
$27.69
Sea-Dog 6714651 Coat Hook - Small

Sea-Dog 6714651 Coat Hook - Small

$10.89 - $10.89
$10.89
$10.89 - $10.89
$10.89
Item locally warehoused

Stamped 304 Stainless Steel.

$10.89 - $10.89
$10.89
$10.89 - $10.89
$10.89
Deck Fill Cap-Blue (Water)

Deck Fill Cap-Blue (Water)

$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
Item locally warehoused

Injection molded fiberglass filled nylon. Does not require grounding. Each deck fill has a special cap with a built-in key for easy cap removal. Ca...

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$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
Deck Fill Cap-Black (Oil)

Deck Fill Cap-Black (Oil)

$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
Item locally warehoused

Injection molded fiberglass filled nylon. Does not require grounding. Each deck fill has a special cap with a built-in key for easy cap removal. Ca...

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$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
Deck Fill Cap-Brown (Waste)

Deck Fill Cap-Brown (Waste)

$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
Item locally warehoused

Injection molded fiberglass filled nylon. Does not require grounding. Each deck fill has a special cap with a built-in key for easy cap removal. Ca...

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$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
Yeck Fill Cap-Blue (Water)

Yeck Fill Cap-Blue (Water)

$15.29 - $15.29
$15.29
$15.29 - $15.29
$15.29
Item locally warehoused

Blue Water Cap Only.Cap threads are 1-1/4" x 11-1/2 NPSM straight.

$15.29 - $15.29
$15.29
$15.29 - $15.29
$15.29
SeaDog 351300 Hose Deck Fill Body without Cap, 1-1/2" Hose Diameter

Sea-Dog 316 Stainless Deck Fill Body – 1-1/2" Hose, No Cap (351300)

$68.49 - $68.49
$68.49
$68.49 - $68.49
$68.49
Item locally warehoused

The Sea-Dog 351300 Deck Fill Body is a heavy-duty 316 stainless steel deck fill fitting for 1-1/2" fuel, water, or waste hose connections. Sold wit...

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$68.49 - $68.49
$68.49
$68.49 - $68.49
$68.49
Deck Fill Cap-Green (Diesel)

Deck Fill Cap-Green (Diesel)

$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
Item locally warehoused

Injection molded fiberglass filled nylon. Does not require grounding. Each deck fill has a special cap with a built-in key for easy cap removal. Ca...

View full details
$25.99 - $25.99
$25.99
$25.99 - $25.99
$25.99
Sea-Dog 0804951 Eye Bolt w/Shoulder, 5/8" I.D.

Sea-Dog 0804951 Eye Bolt w/Shoulder, 5/8" I.D.

$61.19 - $61.19
$61.19
$61.19 - $61.19
$61.19
Item locally warehoused

Corrosion resistant machined 304 stainless steel w/metric threads.Designed to take inline loads, shouldered eyebolts can handle limited side loadin...

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$61.19 - $61.19
$61.19
$61.19 - $61.19
$61.19