Steel Hex Nuts | McMaster-Carr

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Stainless Steel

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Metric Class 6g

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8,955 Products

Hex Nuts

Standard Profile About Standard Profile

Hex Nuts

The most common hex nuts for fastening machinery and equipment

Mil. Spec. Hex Nuts

Mil. Spec. Hex Nuts

Meet strict U.S. military standards for material and construction

Hex Nuts for High-Pressure Applications

Hex Nuts for High-Pressure Applications

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

JIS Hex Nuts

Fasten parts and components that are made to Japanese Industrial Standards

Left-Hand-Thread Hex Nuts

Left-Hand-Thread Hex Nuts

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

Hex Nut Assortments

Hex Nut Assortments

A range of sizes to fasten a variety of parts

Thin Profile About Thin Profile

Thin-Profile Hex Nuts

About half the height of standard nuts to fit in spaces with low clearance

Mil. Spec. Thin-Profile Hex Nuts

Meet strict U.S. military standards for material and construction

Left-Hand-Thread Thin-Profile Hex Nuts

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

Heavy Profile About Heavy Profile

Heavy-Profile Hex Nuts

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

Heavy-Profile Hex Nuts for High-Pressure Applications

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

Structural Heavy-Profile Hex Nuts

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

Left-Hand-Thread Heavy-Profile Hex Nuts

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

High Profile About High Profile

High-Profile Hex Nuts

Larger gripping area keeps wrenches from slipping off as you tighten

Thin-Heavy Profile About Thin-Heavy Profile

Thin-Heavy-Profile Hex Nuts

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

Narrow Profile About Narrow Profile

Narrow-Profile Hex Nuts

20% narrower than other nuts to fit in cramped spaces

Mil. Spec. Narrow-Profile Hex Nuts

Meet strict U.S. military standards for material and construction

Other Products

Locknuts

Hold fasteners in place to prevent loosening from vibration

Flange Nuts

The flange distributes pressure, so you don't need a washer

Coupling Nuts

Connect and extend threaded rods

Lead Screw Nuts

Lead Screw Nuts

Mate with lead screws to move components in a straight line

Panel Nuts

Extremely thin for tight spots such as electrical panels; also known as dress nuts

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

Weld Nuts

Weld to metal surfaces to add permanent threads

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Pipe and Pipe Fittings

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

Easy to tighten and loosen by hand for making frequent adjustments

Split Nuts

Swivel to attach at any point on a threaded rod for quick installation

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

Clip-On Nuts

Slide onto the edge of thin panels to create a fastening point

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