Square Neck Screws | McMaster-Carr

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Stainless Steel

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Hot-Dipped Galvanized

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Partially Threaded

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30,000 psi to 99,999 psi

100,000 psi or greater

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Metric Class 6g

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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992 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

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

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

Suitable for fastening most machinery and equipment

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

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

Plow Bolts

The head sits flush with countersunk holes while the bolt stays in place when tightening a nut

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