5/16"-18 Carriage Bolts | McMaster-Carr

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184 Products

Carriage Bolts

Medium-Strength Grade 5 Steel Square-Neck Carriage Bolts

Medium-Strength Grade 5 Steel Square-Neck Carriage Bolts

Suitable for fastening most machinery and equipment

18-8 Stainless Steel Square-Neck Carriage Bolts

18-8 Stainless Steel Square-Neck Carriage Bolts

Good chemical resistance to water and mild chemicals such as cleaning solutions

Low-Strength Steel Square-Neck Carriage Bolts

Low-Strength Steel Square-Neck Carriage Bolts

About half the strength of medium-strength bolts for light duty fastening

Highly Corrosion-Resistant 316 Stainless Steel Square-Neck Carriage Bolts

Highly Corrosion-Resistant 316 Stainless Steel Square-Neck Carriage Bolts

Excellent resistance to salt water and harsh chemicals such as bleach

High-Strength Grade 8 Steel Square-Neck Carriage Bolts

High-Strength Grade 8 Steel Square-Neck Carriage Bolts

Often used in high-stress applications, such as valves, pumps, and motors

Medium-Strength Grade 5 Steel Knurled-Neck Carriage Bolts

Medium-Strength Grade 5 Steel Knurled-Neck Carriage Bolts

Grip the inside of the hole and stay put when tightening a nut

Low-Strength Steel Knurled-Neck Carriage Bolts

Low-Strength Steel Knurled-Neck Carriage Bolts

Grip the inside of the hole and stay put for light duty fastening

Bronze Square-Neck Carriage Bolts

Bronze Square-Neck Carriage Bolts

Electrically conductive and corrosion resistant to salt water, gases, and sewage

Other Products

Elevator Bolts

Create a flush joint to allow movement in tight spaces such as grain elevators and belting systems

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)