Best Carriage Bolts Under $50 (2026)
We ranked kits by value score based on material/coating, bolt sizes offered, included nuts/washers quantity, and suitability for outdoor or woodworking applications
The Verdict
- Best Overall: Zonon Stainless Steel Carriage Bolts Kit (50 pcs) with Nuts & Washers — Best for corrosion resistance: stainless-steel kit with nuts and washers suited to outdoor and marine-prone projects
- Best Value: 1/2 in. x 3-1/2 in. Carriage Bolt Kit, ceramic black ruspert coating — Best for exterior appearance: 1/2" ceramic black ruspert-coated bolts for rust resistance and a dark finish on outdoor builds
This roundup lists carriage bolt kits under $50 chosen for outdoor and woodworking use, emphasizing corrosion resistance, kit size, and included hardware. Picks were scored by value using thread size variety, material/coating, quantity per kit, and versatility for deck or metal-to-wood projects
Top Picks
-
1
Best Overall Zonon Stainless Steel Carriage Bolts Kit (50 pcs) with Nuts & Washers
Best for corrosion resistance: stainless-steel kit with nuts and washers suited to outdoor and marine-prone projects
A versatile kit of stainless steel carriage bolts, hex nuts, and flat washers in 5/16-18 size. Includes 50 bolts, 50 nuts, and 50 washers for a complete fastener set. Customers note solid construction and good fit
- all-in-one fastener kit
- stainless steel for corrosion resistance
- precise 5/16-18 thread
-
2
Best Value 1/2 in. x 3-1/2 in. Carriage Bolt Kit, ceramic black ruspert coating
Best for exterior appearance: 1/2" ceramic black ruspert-coated bolts for rust resistance and a dark finish on outdoor builds
Carriage bolt kit includes 12 bolts, 12 washers, and 12 nuts with a 5-layer ceramic black ruspert coating for rust resistance. Suitable for exterior use and heavy-duty projects like decks and gazebos. Customer notes emphasize quality and value for money
- rust-resistant coating
- complete bolt-kit (bolts, washers, nuts)
- semiflush flat head design
-
3
1/2 in x 4 in Carriage Bolt Kit (12 bolts, 12 washers, 12 nuts) ceramic black ruspert coated
Best for longer fastenings: 1/2" x 4" ceramic-coated bolts with matched washers and nuts for outdoor assemblies
Carriage bolt kit with ceramic black ruspert coating for exterior use. Includes 12 bolts, 12 washers, and 12 hex nuts; designed for rust resistance and durability. Customers note good build quality and value for money
- rust-resistant coating
- complete kit with nuts and washers
- suitable for exterior lumber
-
4
3/8 x 2 in galvanized carriage bolt kit (50 pcs) by Makers Bolt
Best galvanized option for decks: 3/8" x 2" galvanized kit in a 50-piece pack designed for outdoor hardware
Galvanized carriage bolts kit includes bolts, washers, and nuts for exterior projects. Semi-flush flat head aids decking and pergola work; corrosion-resistant coating enhances durability. Customers note good quality and value for money, with mixed feedback on washers
- complete hardware kit
- corrosion-resistant coating
- flat head for semi-flush finish
-
5
1/2 in x 5 in black carriage bolt kit (12 bolts, 12 washers, 12 nuts)
Best for heavy-duty outdoor holds: 1/2" x 5" black-coated bolts with washers and nuts for long-span connections
Carriage bolt kit with ceramic black ruspert coating for exterior use. Includes 12 bolts, 12 washers, and 12 hex nuts; rust resistance is noted as 2X that of galvanized. Customers cite solid build and good value, with usefulness for pergolas and decks
- ruspert-coated rust resistance
- includes complete hardware set
- semi-flush flat head design
-
6
Galvanized carriage bolt kit 1/4" x 1" (100 pk) with washers and nuts
Best small-diameter galvanized bulk pack: 1/4" x 1" 100-piece kit with washers and nuts for high-volume projects
Galvanized 1/4" carriage bolt kit includes 100 bolts, 100 USS washers, and 100 hex nuts. Hot dip galvanized for exterior use; provides semi-flush flat head for decks and outdoor projects. Customer note: high quality and good value
- galvanized exterior-grade
- includes bolts, washers, nuts
- flat head delivers semi-flush finish
-
7
1/2 in x 6 in Carriage Bolt Kit with 12 bolts, washers & nuts
Best for extra length needs: 1/2" x 6" bolt kit with washers and nuts for deep material stacks in exterior builds
Ceramic black ruspert coated carriage bolts kit for exterior use. Includes 12 bolts, 12 washers, and 12 nuts; provides rust resistance and semi-flush flat head for decks and pergolas. Customer note: good quality and value for money
- rust-resistant coating
- includes full hardware kit
- semi-flush head for finished look
-
8
1/4 in x 1-1/2 in galvanized carriage bolt kit (100 pcs)
galvanized mid-lengths: 1/4" x 1-1/2" 100-piece pack suited to general outdoor wood fastening
Galvanized carriage bolt kit includes 100 bolts, 100 washers, and 100 hex nuts. Hot-dip galvanized for exterior use and corrosion resistance; suitable for decks and outdoor structures. Customer: great quality and value for money
- 100 pcs bolts, washers, nuts
- hot-dip galvanized for exterior durability
- meets ASME/ASTM standards
-
9
Hillman galvanized carriage bolts 1/4 x 6, 100 ct
Best budget bulk galvanized supply: 1/4" x 6" 100-count bolts for wood-to-metal connections in large projects
Carriage bolts for fastening wood to wood or wood to metal with a semi-flush flat head. Self-locking square underside reduces need for a driving tool; galvanized finish resists rust. Customer insight notes good quality and value, with mixed views on thread quality
- rust-resistant galvanized finish
- self-locking square underside
- no washer needed
-
10
1/4 in x 2-1/2 in galvanized carriage bolt kit (100 pcs) with nuts & washers
Best high-rating galvanized kit: 1/4" x 2-1/2" 100-piece set with nuts and washers for exterior wood assemblies
Galvanized carriage bolt kit includes 100 bolts, 100 washers, and 100 hex nuts. Provides corrosion resistance for exterior use; flat head for semi-flush finish. One customer note highlights quality and value for money
- complete hardware kit
- hot-dip galvanized coating
- meets industry standards