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Best Carriage Bolts Deals Online in the US (10 deals found)

Last Updated - May 2, 2026 Sort By:

Best Choice

New
EASTPUK 60Pcs 1/4-20 Carriage Bolts Assortment Kit with Nuts and Washers, 304 Stainless Steel Round Head Square Neck 1/4 Carriage Bolts and Nuts Kit, Full Thread for Outdoor
PRODUCT SIZE - Thread Diameter: 1/4", Length: 5/8, 3/4, 1-1/4, 1-1/2, 2", Thread Pitch: 0.05", Head Diameter: 0.56“, Head Height: 0.15”. Ideal for wood projects, timber frame shed, trailer deck boards, deck construction, outdoor bench rebuild.

$7.99
New
1/2" x 6" (25 Pack) Galvanized Carriage Bolt Kit Grade 307A Includes 1/2" USS Flat Washers (25 pcs) and 1/2"-13 Hex Nuts (25 pcs), Hot Dip Galvanized for Exterior Use by Makers Bolt
Diameter: 1/2" | Length: 6" | Head diameter: 1.062" | Nut diameter: 1/2" | Nut wrench size: 3/4" | Washer outside diameter: 1-3/8"

$59.33
Best Value

New
VGBUY 1/4-20 x 1-1/4" Carriage Bolts Screws 24 Sets, 304 Stainless Steel 18-8, Round Head Square Neck, Carriage Bolts and Nuts Kit, with Flat Washers
Strong Carriage Bolts: Carriage bolt is dome head bolt fastener with a locking neck style, which prevents turning when the nut it tightened or removed. Can be used in wood, metal applications

$9.99
New
1/2" x 8" (25 Pack) Galvanized Carriage Bolt Kit Grade 307A Includes 1/2" USS Flat Washers (25 pcs) and 1/2"-13 Hex Nuts (25 pcs), Hot Dip Galvanized for Exterior Use by Makers Bolt
Diameter: 1/2" | Length: 8" | Head diameter: 1.062" | Nut diameter: 1/2" | Nut wrench size: 3/4" | Washer outside diameter: 1-3/8"

$68.87
New
3/8" x 3-1/2" (50 Pack) Galvanized Carriage Bolt Kit, Grade 307A, Hot Dip Galvanized for Exterior Use by Makers Bolt
Diameter: 3/8" | Length: 3-1/2" | Head diameter: 0.813" | Nut diameter: 3/8" | Nut wrench size: 9/16" | Washer outside diameter: 1"

$46.61
New
HARSKIYER 12 Sets 1/4-20 x 3 Inch Carriage Bolt Kit, Carbon Steel Carriage Bolts Galvanized Carriage Bolt Assortment, Round Head Carriage Screws with Hex Nuts and Flat Washers Full Thread Coverage
Package details: You will get 12 x carriage bolts, which thread size is 1/4-20, length is 3 inch. 12 x hex nuts, which size is 1/4 inch. 12 x flat washers, which size is 1/4 inch

$6.99
New
VGBUY 3/8-16 x 3-1/2" Carriage Bolts Screws 6 Sets, 304 Stainless Steel 18-8, Round Head Square Neck, Carriage Bolts and Nuts Kit, with Flat Washers
Strong Carriage Bolts: Carriage bolt is dome head bolt fastener with a locking neck style, which prevents turning when the nut it tightened or removed. Can be used in wood, metal applications

$9.99
New
OUSCHR 1/4-20 x 1-1/2" Carriage Bolt Kit, Stainless Steel 304 Carriage Bolts Screws with Hex Nuts & Flat Washers, Round Head Square Neck, Full Thread, Black Finish, 12 Sets
Thread Diameter: 1/4 Inch; Thread Pitch: 20 TPI; Screw Length: 1-1/2 Inch; Head Diameter: 0.57 Inch; Head Height: 0.12 Inch.

$7.99
New
VGBUY 5/16-18 x 2" Carriage Bolts Screws 12 Sets, 304 Stainless Steel 18-8, Round Head Square Neck, Carriage Bolts and Nuts Kit, with Flat Washers
Strong Carriage Bolts: Carriage bolt is dome head bolt fastener with a locking neck style, which prevents turning when the nut it tightened or removed. Can be used in wood, metal applications

$9.99
11% Off

New
Zonon 12 Sets 1/2 x 10 Inch Black Carriage Bolt Kit Galvanized Carriage Bolt Set Includes Rust Resistance Washers and Nuts for Fastening Accessories
Widely Applied: to the fastening of wooden components to wood or metal, they are suitable for heavy applications like decks, pavilion, crib screws, furniture and other structures that require sturdy support

$28.49 $31.99

10 Carriage Bolts deals are available from: Amazon stores, starting from $6.99.
The biggest discount we found is 11% on Zonon 12 Sets 1/2 x 10 Inch Black Carriage Bolt Kit Galvanized Carriage Bolt Set Includes Rust Resistance Washers and Nuts for Fastening Accessories at Amazon.
The lowest price we found is $6.99 while the highest is $68.87.
Prices for the best Carriage Bolts deals average at $25.62.
Last updated on May 2, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Carriage Bolts.