McMaster-Carr

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	Thread Size Thread Size

	Thread Type Thread Type

UNC

UNF

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UN12

	Nut Type Nut Type


Hex	Locknut

Cap	Coupling

	Hex Nut Profile Hex Nut Profile


Standard	Thin

Extra-Wide Thin

	Finish Finish

Zinc Plated

Hot-Dipped Galvanized

Black Oxide

	Thread Direction Thread Direction


Right Hand	Left Hand

	Height Height

	Width Width

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Locking Type Locking Type


Distorted Thread	Nylon Insert

	Specifications Met Specifications Met

ASTM

ASME

Mil. Spec.

	Length Length

	Distorted Thread Type Distorted Thread Type


Center Lock	Top Lock

	Thread Depth Thread Depth

	Sight Hole Diameter Sight Hole Diameter

	Cap Color Cap Color

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278 Products

About Nuts, Materials, and Finishes

Low-Strength Steel Hex Nuts

About half the strength of medium-strength steel nuts, these nuts are for light duty fastening applications.

Left-Hand Threaded
Low-Strength Steel Hex Nuts

These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion.

Low-Strength Steel Thin Hex Nuts

Made from Grade 2 steel, these nuts should be used for light duty fastening applications, such as securing access panels.

Left-Hand Threaded
Low-Strength Steel Thin Hex Nuts

These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion. They’re Grade 2 steel, so they can be used for fastening panels and other light duty fastening applications

Low-Strength Steel
Extra-Wide Thin Hex Nuts

Use these nuts for light duty fastening applications, such as securing access panels.

Low-Strength Steel Top-Lock
Distorted-Thread Locknuts

About half the strength of medium-strength steel locknuts, these are for light duty fastening applications, such as securing access panels.

Low-Strength Steel Center-Lock
Distorted-Thread Locknuts

Use these locknuts for light duty fastening applications, such as securing access panels.

Nylon-Insert Cap Locknuts

The nylon cap covers and grips the threads to resist loosening.

Coupling Nuts with Sight Hole

Use the sight hole to check for proper thread engagement.

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About Nuts, Materials, and Finishes

Nuts

Low-Strength Steel Hex Nuts

Left-Hand ThreadedLow-Strength Steel Hex Nuts

Low-Strength Steel Thin Hex Nuts

Left-Hand ThreadedLow-Strength Steel Thin Hex Nuts

Low-Strength SteelExtra-Wide Thin Hex Nuts

Low-Strength Steel Top-LockDistorted-Thread Locknuts