Neck Length

Tensile Strength

60,000 psi

70,000 psi

120,000 psi

150,000 psi

Not Rated

110,000 psi

Hardness

Not Rated

Rockwell B55

Rockwell B69

Rockwell B70

Rockwell C25

Rockwell C33

Rockwell C22

Thread Fit

Class 2A

Class 2B

Class 3A

Class 6g

Class 6h

Class 8g

Thread Spacing

Coarse

Fine

Thread Pitch

0.8 mm

1 mm

1.25 mm

1.5 mm

1.75 mm

2 mm

2.5 mm

Min Thread Length

Head Height

System of Measurement

Inch

Metric

Head Diameter

Neck Width

Fastener Strength Grade Class

Threading

Partially Threaded

Neck Type

Material

316 Stainless Steel

18-8 Stainless Steel

Black-Oxide Steel

Hot-Dipped Galvanized Steel

Silicon Bronze

Zinc-Flake Coated Steel

Zinc-Plated Steel

Steel

Zinc Yellow-Chromate Plated Steel

Length

Thread Size

Carriage Bolts

869 Products

Medium-Strength Grade 5 SteelSquare-Neck Carriage Bolts

Medium-Strength Grade 5 SteelSquare-Neck Carriage Bolts

Twice as strong as low-strength steel bolts, these bolts are suitable for fastening most machinery and equipment. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.

Medium-Strength Metric Class 8.8Steel Square-Neck Carriage Bolts

Medium-Strength Metric Class 8.8Steel Square-Neck Carriage Bolts

Choose these metric bolts for fastening most machinery and equipment. They are twice as strong as low-strength steel bolts. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.

Low-Strength SteelSquare-Neck Carriage Bolts

Low-Strength SteelSquare-Neck Carriage Bolts

About half the strength of medium-strength bolts, these Grade 2 bolts are for light duty fastening. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.

High-Strength Grade 8 SteelSquare-Neck Carriage Bolts

High-Strength Grade 8 SteelSquare-Neck Carriage Bolts

Made from Grade 8 steel, these bolts can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.

18-8 Stainless SteelSquare-Neck Carriage Bolts

18-8 Stainless SteelSquare-Neck Carriage Bolts

These bolts have good chemical resistance. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.

Super-Corrosion-Resistant 316 StainlessSteel Square-Neck Carriage Bolts

Super-Corrosion-Resistant 316 StainlessSteel Square-Neck Carriage Bolts

More corrosion resistant than 18-8 stainless steel bolts, these bolts have excellent resistance to chemicals and salt water. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.

Bronze Square-Neck Carriage Bolts

Bronze Square-Neck Carriage Bolts

Bronze bolts are resistant to salt water, electrically conductive, and nonmagnetic. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.

Medium-Strength Grade 5 SteelKnurled-Neck Carriage Bolts

Medium-Strength Grade 5 SteelKnurled-Neck Carriage Bolts

These bolts are suitable for fastening most machinery and equipment. Carriage bolts have a smooth, rounded head for a finished look. The knurled neck grips the inside of the hole to keep these bolts from turning when tightening a nut.

Low-Strength SteelKnurled-Neck Carriage Bolts

Low-Strength SteelKnurled-Neck Carriage Bolts

About half the strength of medium-strength bolts, these bolts are for light duty fastening. Carriage bolts have a smooth, rounded head for a finished look. The knurled neck grips the inside of the hole to keep these bolts from turning when tightening a nut.