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Carriage bolts are essential fasteners for creating strong, secure connections in wood and metal projects. Their unique design prevents them from turning when tightened, ensuring a stable and reliable joint. Choosing the right carriage bolt is crucial for the longevity and safety of your construction or repair work.
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
Stainless Carriage Bolts: Our 304 stainless steel carriage bolts 3/8 are of excellent corrosion resistance and durability. These carriage bolts 3/8 x 2-1/2 are ideal for both indoor and outdoor use
Well Made Carriage Bolts 2-1/2 Inch: All of the stainless steel bolts and hex nuts and flat washers are well manufactured with no burs, smooth-symmetrical head, precise and clean threads
Complete Bolts Nuts Washers Kit: You will get 6pcs 3/8-16 x 2-1/2" carriage bolts, 6pcs 3/8-16 hex nuts, 6pcs 3/8" ID flat washers in one package. Standard size, the bolt conforms to ASME B 18.5
SECURE AND RELIABLE - The round head and square neck design of carriage bolts ensure a secure fit in square holes. When used with 1/4 hex nuts and flat washers, they provide reliable and stable fastening. Carriage bolts have a dome head and locking neck...
RUGGED AND DURABLE - EASTPUK carriage bolts are made of quality 18-8 (304) Stainless Steel, offering better corrosion resistance and rust protection compared to standard screws. Carriage bolts 1/4 are long-lasting and less prone to damage, and are...
VALUE PACKAGING AND EASY TO USE - The bolt kit contains 20pcs carriage bolts (6pcs 1/4 x 5/8, 5pcs 1/4 x 3/4, 4pcs 1/4 x 1-1/4, 3pcs 1/4 x 1-1/2, 2pcs 1/4 x 2) + 20pcs stainless washers + 20pcs hex nuts, designed to stay secure during installation and...
Thread Size: 1/4-20; Thread Pitch: 20 TPI; Thread Type: Coarse Thread; Screw Head Diameter: 0.58" (14.8mm); Round Head Height: 0.12" (3.2mm); Length (including the neck): 2 inch.
Package Include: 15 PCS 1/4-20 x 2" Carriage Bolts, 15 PCS 1/4"-20 Hex Nuts and 15 PCS 1/4" ID Flat Washers.
Material: The Carriage bolts kits are made of carbon steel with black coating, which have greater strength and corrosion resistance performance than regular zinc plated fasteners.
Feature: The carriage bolts have round heads and square necks. The square neck locks the square receiver hole to prevent rotation. The polished round head reduces surface protrusion and enhances the safety of connection and application.
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.
Package Includes: 12 PCS 1/4-20 x 1-1/2" Carriage Bolts come with 12 PCS 1/4-20 Hex Nuts and 12 PCS 1/4" ID Flat Washers.
Material: Made of 304 stainless steel which has great strength, good stability and corrosion resistance performance, very reliable.
Feature: Carriage bolts have a dome shaped head and a square neck generally requiring a hex nut and flat washer. The dome shaped head design without a cross slot or hex can be anti-theft. The square neck makes them self-locking when used within a square...
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
Stainless Carriage Bolts: Our 304 stainless steel carriage bolts 5/16 are of excellent corrosion resistance and durability. These carriage bolts 5/16 x 3/4 are ideal for both indoor and outdoor use
Well Made Carriage Bolts 3/4 Inch: All of the stainless steel bolts and hex nuts and flat washers are well manufactured with no burs, smooth-symmetrical head, precise and clean threads
Complete Bolts Nuts Washers Kit: You will get 20pcs 5/16-18 x 3/4" carriage bolts, 20pcs 5/16-18 hex nuts, 20pcs 5/16" ID flat washers in one package. Standard size, the bolt conforms to ASME B 18.5
Last update on 2026-10-14 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Carriage Bolts
Understanding Carriage Bolt Components
Carriage bolts consist of a smooth, domed head, a square section just below the head, and a threaded shank. The domed head offers a clean finish and prevents injury from sharp edges. The square neck is designed to dig into the material being fastened, preventing rotation during installation and use. The threaded shank allows for secure tightening with a nut.
Key Material Considerations
Carriage bolts are commonly made from several materials, each offering different benefits:
Steel: Offers good strength and durability for general-purpose applications. It's often zinc-plated to resist corrosion.
Stainless Steel: Provides excellent corrosion resistance, making it ideal for outdoor use or in environments prone to moisture. It's also very strong.
Brass: Offers good corrosion resistance and a decorative appearance, but is generally not as strong as steel.
Galvanized Steel: Steel treated with a zinc coating for enhanced rust protection, suitable for exterior projects.
Determining the Right Size
Selecting the correct size involves considering two primary dimensions: diameter and length.
Diameter: This refers to the width of the threaded shank and dictates the bolt's strength and the size of the hole required. Common diameters include 1/4", 5/16", 3/8", and 1/2".
Length: Measure from the underside of the bolt's head to the end of the threaded shank. The bolt should be long enough to pass through all materials and allow for the nut and washer, with a few threads still visible.
Choosing the Right Head Style and Finish
While the domed head is standard, some variations exist. The finish also plays a role in performance and aesthetics. Common finishes include plain (uncoated), zinc-plated (for moderate corrosion resistance), and galvanized (for superior outdoor protection). Ensure the finish matches the environment where the bolt will be used.
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