ASTM Hex Nuts | McMaster-Carr

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Specifications Met

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Hex Nut Profile

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Hot-Dipped Galvanized

Zinc Yellow-Chromate Plated

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Fastener Strength Rating

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Unified Standard Class 2A

Unified Standard Class 2B

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3,581 Products

Hex Nuts

Standard Profile About Standard Profile

Hex Nuts

The most common hex nuts for fastening machinery and equipment

46 products

Hex Nuts for High-Pressure Applications

Fasten ASTM A193 screws on pressure tanks, boilers, and heat exchangers

6 products

Thin Profile About Thin Profile

Left-Hand-Thread Thin-Profile Hex Nuts

Tighten when turned to the left to prevent counterclockwise-moving parts from loosening

42 products

Heavy Profile About Heavy Profile

Heavy-Profile Hex Nuts

About 10% wider and taller than standard nuts to handle heavier loads

113 products

Heavy-Profile Hex Nuts for High-Pressure Applications

Secure ASTM A193 screws and are wider and taller than standard nuts to handle heavier loads

61 products

Structural Heavy-Profile Hex Nuts

Secure ASTM A325 screws in structural joints, such as I-beams, columns, and joists

44 products

Thin-Heavy Profile About Thin-Heavy Profile

Thin-Heavy-Profile Hex Nuts

Fit in low-clearance spaces and handle heavier loads than standard nuts

20 products

Other Products

Thread Adapters

Join threads of a different type, size, and gender

3,179 products

Pipe Locknuts

Thread onto the male end of a pipe fitting so it won't loosen from vibration

39 products

Lead Screw Nuts

Mate with lead screws to move components in a straight line

26 products

Coupling Nuts

Connect and extend threaded rods

5 products