Stainless Steel Hex Locknuts

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18-8 Stainless Steel

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A286 Stainless Steel

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400 Series Stainless Steel

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Unified Standard Class 2B

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716 Products

Locknuts

Nylon-Insert Locking About Nylon-Insert Locking

Nylon-Insert Locknuts

Versatile and economical—the most commonly used locknuts

143 products

Thin-Profile Nylon-Insert Locknuts

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

52 products

Heavy-Profile Nylon-Insert Locknuts

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

12 products

High-Profile Nylon-Insert Locknuts

Larger gripping area keeps wrenches from slipping off as you tighten

17 products

Thin-Heavy-Profile Nylon-Insert Locknuts

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

11 products

Mil. Spec. Nylon-Insert Locknuts

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

12 products

Mil. Spec. Thin-Profile Nylon-Insert Locknuts

Meet U.S. military standards and are half the height of standard nuts to fit in low-clearance spaces

11 products

Nylon-Insert Locknut Assortments

A range of sizes to fasten a variety of parts

1 product

Distorted-Thread Locking About Distorted-Thread Locking

Top-Lock Distorted-Thread Locknuts

Irregularly shaped threads at the top grip screws tighter than a nylon insert

38 products

Center-Lock Distorted-Thread Locknuts

Thread on from either side so there’s no risk of damaging screws

23 products

Lock Washer About Lock Washer

Locknuts with External-Tooth Lock Washer

Twist into place by hand to save on assembly time

24 products

Narrow-Profile Locknuts with External-Tooth Lock Washer

20% narrower than other nuts to fit in cramped spaces

1 product

Assortments of Locknuts with External-Tooth Lock Washer

A range of sizes to fasten a variety of parts

1 product

Cotter-Pin Lockable About Cotter-Pin Lockable

Locknuts for use with Cotter Pins

Secure rotating parts subjected to mild vibration, such as wheels on carts

17 products

Flex-Top Locking About Flex-Top Locking

Flex-Top Locknuts for Heavy Vibration

Stronger hold than nylon-insert and distorted-thread locknuts

42 products

Thin-Profile Flex-Top Locknuts for Heavy Vibration

About two-thirds the height of standard nuts to fit in spaces with low clearance

15 products

Heavy-Profile Flex-Top Locknuts for Heavy Vibration

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

5 products

Mil. Spec. Flex-Top Locknuts for Heavy Vibration

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

6 products

Spring-Stop Locking About Spring-Stop Locking

Spring-Stop Locknuts

Withstand heavy vibration similar to distorted-thread nuts and are reusable

4 products

Other Products

Flange Nuts

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

85 products

Cap Nuts

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

50 products

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

20 products

Panel Nuts

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

57 products

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

56 products

Split Nuts

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

4 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

9 products