Grade 9 Steel Hex Nuts | McMaster-Carr

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System of Measurement

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Corrosion-Resistant Coated

Hot-Dipped Galvanized

Zinc Flake Coated

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Zinc Yellow-Chromate Plated

Hex Nut Profile

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Thread Direction

Thread Type

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Thread Spacing

Fastener Strength Rating

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Unified Standard Class 2B

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EAR99

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About Hex Nuts

Choose a hex nut with the right profile, material, and strength for your application.

Hex Nuts

The most commonly used hex nuts, these are suitable for fastening most machinery and equipment.

Medium-Strength Steel

Image of Product. Front orientation. Hex Nuts. Hex Nuts.

These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating to create a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Black Corrosion-Resistant-Coated Steel—Combines a finished appearance with the rust resistance of stainless steel. The coating has been tested to extreme standards, including 1,000 hours of salt spray resistance, to hold up in wet and outdoor environments. Also known as black luster.

Steel—Best for dry environments since moisture will cause these nuts to rust.

	Thread Size	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		1/4"-20	7/16"	7/32"	SAE Grade 5	ASME B18.2.2	100	000000000	00000


		1/4"-28	7/16"	7/32"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		5/16"-18	1/2"	17/64"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		5/16"-24	1/2"	17/64"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		3/8"-16	9/16"	21/64"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		3/8"-24	9/16"	21/64"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		7/16"-14	11/16"	3/8"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		7/16"-20	11/16"	3/8"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		1/2"-13	3/4"	7/16"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		1/2"-20	3/4"	7/16"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		9/16"-12	7/8"	31/64"	SAE Grade 5	ASME B18.2.2	50	000000000	00000


		9/16"-18	7/8"	31/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		5/8"-11	15/16"	35/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		5/8"-18	15/16"	35/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		3/4"-10	1 1/8"	41/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		3/4"-16	1 1/8"	41/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		7/8"-9	1 5/16"	3/4"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		7/8"-14	1 5/16"	3/4"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		1"-8	1 1/2"	55/64"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		1"-12	1 1/2"	55/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1"-14	1 1/2"	55/64"	SAE Grade 5	ASME B18.2.2	10	000000000	00000


		1 1/8"-7	1 11/16"	31/32"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		1 1/8"-12	1 11/16"	31/32"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		1 1/4"-7	1 7/8"	1 1/16"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
		1 1/4"-12	1 7/8"	1 1/16"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
		1 3/8"-6	2 1/16"	1 11/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 3/8"-12	2 1/16"	1 11/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 1/2"-6	2 1/4"	1 9/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 1/2"-12	2 1/4"	1 9/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		2"-4 1/2	3"	1 23/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
		2"-12	3"	1 23/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000


		Black-Oxide Steel



				1/4"-20	7/16"	7/32"	SAE Grade 5	ASME B18.2.2	50	000000000	0000


				1/4"-28	7/16"	7/32"	SAE Grade 5	ASME B18.2.2	50	000000000	00000
				5/16"-18	1/2"	17/64"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
				5/16"-24	1/2"	17/64"	SAE Grade 5	ASME B18.2.2	50	000000000	00000
				3/8"-16	9/16"	21/64"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
				3/8"-24	9/16"	21/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
				7/16"-14	11/16"	3/8"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
				7/16"-20	11/16"	3/8"	SAE Grade 5	ASME B18.2.2	25	000000000	0000
				1/2"-13	3/4"	7/16"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
				1/2"-20	3/4"	7/16"	SAE Grade 5	ASME B18.2.2	10	000000000	0000
				9/16"-12	7/8"	31/64"	SAE Grade 5	ASME B18.2.2	10	000000000	0000


				9/16"-18	7/8"	1/2"	SAE Grade 5	ASME B18.2.2	25	000000000	0000
				5/8"-11	15/16"	35/64"	SAE Grade 5	ASME B18.2.2	10	000000000	0000
				5/8"-18	15/16"	35/64"	SAE Grade 5	ASME B18.2.2	10	000000000	0000
3/4"-10				1 1/8"	41/64"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
3/4"-16	1 1/8"			41/64"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
7/8"-9	1 5/16"			3/4"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
7/8"-14	1 5/16"			3/4"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
1"-8	1 1/2"			55/64"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
1"-14	1 1/2"			7/8"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
1 1/8"-7	1 11/16"			31/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000


1 1/8"-12	1 11/16"			1"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
1 1/4"-7	1 7/8"			1 1/16"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
1 1/4"-12	1 7/8"			1 1/16"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
1 3/8"-6	2 1/16"			1 3/16"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
1 3/8"-12	2 1/16"			1 3/16"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
1 1/2"-6	2 1/4"			1 5/16"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
1 1/2"-12	2 1/4"			1 5/16"	SAE Grade 5	ASME B18.2.2	1	000000000	00000


Black Corrosion-Resistant-Coated Steel



				1/4"-20	7/16"	7/32"	SAE Grade 5	ASME B18.2.2	10	000000000	0000


				5/16"-18	1/2"	17/64"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
				3/8"-16	9/16"	21/64"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
				7/16"-14	11/16"	3/8"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
				1/2"-13	3/4"	7/16"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
				9/16"-12	7/8"	31/64"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
				5/8"-11	15/16"	35/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
				3/4"-10	1 1/8"	41/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000


				Steel



						1/4"-20	7/16"	7/32"	SAE Grade 5	ASME B18.2.2	100	000000000	0000


						1/4"-28	7/16"	7/32"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
						5/16"-18	1/2"	17/64"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
						5/16"-24	1/2"	17/64"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		3/8"-16				9/16"	21/64"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		3/8"-24	9/16"			21/64"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		7/16"-14	11/16"			3/8"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		7/16"-20	11/16"			3/8"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		1/2"-13	3/4"			7/16"	SAE Grade 5	ASME B18.2.2	50	000000000	00000
		1/2"-20	3/4"			7/16"	SAE Grade 5	ASME B18.2.2	50	000000000	00000
		9/16"-12	7/8"			31/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000


		9/16"-18	7/8"			31/64"	SAE Grade 5	ASME B18.2.2	25	000000000	0000
		5/8"-11	15/16"			35/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		5/8"-18	15/16"			35/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		3/4"-10	1 1/8"			41/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		3/4"-16	1 1/8"			41/64"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		7/8"-9	1 5/16"			3/4"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		7/8"-14	1 5/16"			3/4"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		1"-8	1 1/2"			55/64"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
		1"-12	1 1/2"			55/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1"-14	1 1/2"			55/64"	SAE Grade 5	ASME B18.2.2	5	000000000	0000


		1 1/8"-7	1 11/16"			31/32"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
		1 1/8"-12	1 11/16"			31/32"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
		1 1/4"-7	1 7/8"			1 1/16"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
		1 1/4"-12	1 7/8"			1 1/16"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
		1 3/8"-6	2 1/16"			1 11/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 3/8"-12	2 1/16"			1 11/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 1/2"-6	2 1/4"			1 9/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 1/2"-12	2 1/4"			1 9/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 3/4"-5	2 5/8"			1 1/2"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
		1 3/4"-12	2 5/8"			1 1/2"	SAE Grade 5	ASME B18.2.2	1	000000000	00000


		2"-4 1/2	3"			1 23/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
		2"-12	3"			1 23/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000

High-Strength Steel

Rated Grade 8, Grade C, or Class 10, these nuts are about 25% stronger than medium-strength steel nuts. They are commonly used to fasten components in valves, pumps, motors, and other high-stress applications. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.

	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Yellow-Chromate-Plated Steel



	1/4"-20	7/16"	7/32"	SAE Grade 8	ASME B1.1, ASME B18.2.2, SAE J995	100	000000000	00000


	5/16"-18	1/2"	17/64"	SAE Grade 8	ASME B1.1, ASME B18.2.2, SAE J995	100	000000000	00000
	3/8"-16	9/16"	21/64"	SAE Grade 8	ASME B1.1, ASME B18.2.2, SAE J995	100	000000000	00000
	1/2"-13	3/4"	7/16"	SAE Grade 8	ASME B1.1, ASME B18.2.2, SAE J995	50	000000000	00000
	5/8"-11	15/16"	35/64"	SAE Grade 8	ASME B1.1, ASME B18.2.2, SAE J995	25	000000000	00000
	3/4"-10	1 1/8"	41/64"	SAE Grade 8	ASME B1.1, ASME B18.2.2, SAE J995	10	000000000	00000
	1"-8	1 1/2"	55/64"	SAE Grade 8	ASME B1.1, ASME B18.2.2, SAE J995	5	000000000	00000


	Black Corrosion-Resistant-Coated Steel



			1/4"-20	7/16"	7/32"	SAE Grade 8	ASME B18.2.2	10	000000000	00000


			5/16"-18	1/2"	17/64"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
			3/8"-16	9/16"	21/64"	SAE Grade 8	ASME B18.2.2	5	000000000	0000
			1/2"-13	3/4"	7/16"	SAE Grade 8	ASME B18.2.2	5	000000000	00000

Low-Strength Steel

Rated Grade 2, Class 6, or lower, these nuts are about half as strong as medium-strength nuts. They are suitable for light duty fastening applications, such as securing access panels. Use them with screws that have a similar strength rating to avoid stripping threads during installation.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Hot-Dipped Galvanized Steel—Combines the strength of steel with the rust resistance of stainless steel. These nuts are an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals. The galvanized finish is thicker than other types of coatings, so the threads may be more likely to stick during installation. Use with other hot-dipped galvanized fasteners.

Steel—Best for dry environments since moisture will cause these nuts to rust.

	Thread Size	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		1/4"-20	7/16"	7/32"	SAE Grade 2	ASME B18.2.2	100	000000000	00000


		1/4"-28	7/16"	7/32"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
		5/16"-18	1/2"	17/64"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
		5/16"-18	9/16"	7/32"	—	ASME B18.2.2	100	000000000	0000
		5/16"-24	1/2"	17/64"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
		3/8"-16	9/16"	21/64"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
		3/8"-16	5/8"	1/4"	—	ASME B18.2.2	100	000000000	00000
		3/8"-24	9/16"	21/64"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
		7/16"-14	11/16"	3/8"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
		7/16"-20	11/16"	3/8"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
		1/2"-13	3/4"	7/16"	SAE Grade 2	ASME B18.2.2	100	000000000	00000


		1/2"-20	3/4"	7/16"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
		9/16"-12	7/8"	31/64"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
		9/16"-18	7/8"	31/64"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
		5/8"-11	15/16"	35/64"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
		5/8"-18	15/16"	35/64"	SAE Grade 2	ASME B18.2.2	25	000000000	00000
		3/4"-10	1 1/8"	41/64"	SAE Grade 2	ASME B18.2.2	25	000000000	00000
		3/4"-16	1 1/8"	41/64"	SAE Grade 2	ASME B18.2.2	25	000000000	00000
		7/8"-9	1 5/16"	3/4"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
		7/8"-14	1 5/16"	3/4"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
		1"-8	1 1/2"	55/64"	SAE Grade 2	ASME B18.2.2	5	000000000	00000


		1"-12	1 1/2"	55/64"	SAE Grade 2	ASME B18.2.2	5	000000000	00000
		1"-14	1 1/2"	55/64"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
		1 1/8"-7	1 11/16"	31/32"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
		1 1/8"-12	1 11/16"	31/32"	SAE Grade 2	ASME B18.2.2	5	000000000	0000
		1 1/4"-7	1 7/8"	1 1/16"	SAE Grade 2	ASME B18.2.2	5	000000000	0000
		1 1/4"-12	1 7/8"	1 1/16"	SAE Grade 2	ASME B18.2.2	5	000000000	00000
		1 3/8"-6	2 1/16"	1 11/64"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 3/8"-12	2 1/16"	1 11/64"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 1/2"-6	2 1/4"	1 9/32"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 1/2"-12	2 1/4"	1 9/32"	SAE Grade 2	ASME B18.2.2	1	000000000	0000


		Black-Oxide Steel



				1/4"-20	7/16"	7/32"	SAE Grade 2	ASME B18.2.2	100	000000000	00000


				5/16"-18	1/2"	17/64"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
				3/8"-16	9/16"	21/64"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
				1/2"-13	3/4"	7/16"	SAE Grade 2	ASME B18.2.2	25	000000000	00000
				5/8"-11	15/16"	35/64"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
				3/4"-10	1 1/8"	41/64"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
				1"-8	1 1/2"	55/64"	SAE Grade 2	ASME B18.2.2	1	000000000	0000


				Hot-Dipped Galvanized Steel



						1/4"-20	7/16"	7/32"	SAE Grade 2	ASME B18.2.2	100	000000000	0000


5/16"-18						1/2"	17/64"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
3/8"-16	9/16"					21/64"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
7/16"-14	11/16"					3/8"	SAE Grade 2	ASME B18.2.2	50	000000000	0000
1/2"-13	3/4"					7/16"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
5/8"-11	15/16"					35/64"	SAE Grade 2	ASME B18.2.2	25	000000000	00000
3/4"-10	1 1/8"					41/64"	SAE Grade 2	ASME B18.2.2	10	000000000	0000
7/8"-9	1 5/16"					3/4"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
1"-8	1 1/2"					55/64"	SAE Grade 2	ASME B18.2.2	5	000000000	0000
1 1/8"-7	1 11/16"					31/32"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
1 1/4"-7	1 7/8"					1 1/16"	SAE Grade 2	ASME B18.2.2	1	000000000	0000


1 1/2"-6	2 1/4"					1 9/32"	SAE Grade 2	ASME B18.2.2	1	000000000	0000


Steel



						1/4"-20	7/16"	7/32"	SAE Grade 2	ASME B18.2.2	100	000000000	0000


						1/4"-28	7/16"	7/32"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
						5/16"-18	1/2"	17/64"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
						5/16"-24	1/2"	17/64"	SAE Grade 2	ASME B18.2.2	100	000000000	0000
						3/8"-16	9/16"	21/64"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
						3/8"-24	9/16"	21/64"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
						7/16"-14	11/16"	3/8"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
						7/16"-20	11/16"	3/8"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
						1/2"-13	3/4"	7/16"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
						1/2"-20	3/4"	7/16"	SAE Grade 2	ASME B18.2.2	100	000000000	00000
						9/16"-12	7/8"	31/64"	SAE Grade 2	ASME B18.2.2	50	000000000	00000


						9/16"-18	7/8"	31/64"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
						5/8"-11	15/16"	35/64"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
						5/8"-18	15/16"	35/64"	SAE Grade 2	ASME B18.2.2	50	000000000	00000
						3/4"-10	1 1/8"	41/64"	SAE Grade 2	ASME B18.2.2	25	000000000	00000
						3/4"-16	1 1/8"	41/64"	SAE Grade 2	ASME B18.2.2	25	000000000	00000
						7/8"-9	1 5/16"	3/4"	SAE Grade 2	ASME B18.2.2	25	000000000	00000
						7/8"-14	1 5/16"	3/4"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
						1"-8	1 1/2"	55/64"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
						1"-12	1 1/2"	55/64"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
						1"-14	1 1/2"	55/64"	SAE Grade 2	ASME B18.2.2	10	000000000	00000


		1 1/8"-7	1 11/16"			31/32"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
		1 1/8"-12	1 11/16"			31/32"	SAE Grade 2	ASME B18.2.2	10	000000000	00000
		1 1/4"-7	1 7/8"			1 1/16"	SAE Grade 2	ASME B18.2.2	5	000000000	00000
		1 1/4"-12	1 7/8"			1 1/16"	SAE Grade 2	ASME B18.2.2	5	000000000	00000
		1 3/8"-6	2 1/16"			1 11/64"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 3/8"-12	2 1/16"			1 11/64"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 1/2"-6	2 1/4"			1 9/32"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 1/2"-12	2 1/4"			1 9/32"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 5/8"-5 1/2	2 7/16"			1 25/64"	SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 5/8"-12	2 7/16"			1 25/64"	SAE Grade 2	ASME B18.2.2	1	000000000	0000


		1 3/4"-5	2 5/8"			1 1/2"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		1 3/4"-12	2 5/8"	1 1/2"		SAE Grade 2	ASME B18.2.2	1	000000000	0000
		1 7/8"-5	2 13/16"	1 39/64"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		1 7/8"-12	2 13/16"	1 39/64"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		2"-12	3"	1 23/32"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		2 1/4"-4 1/2	3 3/8"	1 15/16"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		2 1/4"-12	3 3/8"	1 15/16"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		2 1/2"-4	3 3/4"	2 5/32"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		2 1/2"-12	3 3/4"	2 5/32"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		2 3/4"-4	4 1/8"	2 3/8"	SAE Grade 2	ASME B18.2.2	1	000000000	00000


		3"-4	4 1/2"	2 19/32"	SAE Grade 2	ASME B18.2.2	1	000000000	00000
		3"-12	4 1/2"	2 19/32"	SAE Grade 2	ASME B18.2.2	1	000000000	000000
		3 1/2"-4	5 3/8"	3 1/2"	SAE Grade 2	ASME B18.2.2	1	000000000	000000

Heavy-Profile Hex Nuts

About 10% wider and taller than standard-profile hex nuts, these handle heavier loads by distributing them over a larger area.

Extreme-Strength Steel

These nuts are about 20% stronger than high-strength steel nuts. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Steel—Best for dry environments since moisture will cause these nuts to rust.

	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Yellow-Chromate-Plated Steel



	1/4"-20	1/2"	15/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	100	000000000	000000


	1/4"-28	1/2"	15/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	50	000000000	00000
	5/16"-18	9/16"	19/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	50	000000000	0000
	5/16"-24	9/16"	19/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	25	000000000	0000
	3/8"-16	11/16"	23/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	50	000000000	00000
	3/8"-24	11/16"	23/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	25	000000000	00000
	1/2"-13	7/8"	31/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	25	000000000	00000
	1/2"-20	7/8"	31/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	10	000000000	0000
	5/8"-11	1 1/16"	39/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	10	000000000	00000
	5/8"-18	1 1/16"	39/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	10	000000000	00000
	3/4"-10	1 1/4"	47/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	10	000000000	00000


	3/4"-16	1 1/4"	47/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	10	000000000	00000
	1"-8	1 5/8"	63/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000
	1"-14	1 5/8"	63/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000


	Steel



			1/4"-28	1/2"	15/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	50	000000000	00000


			5/16"-24	9/16"	19/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	50	000000000	00000
			3/8"-24	11/16"	23/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	25	000000000	0000
			7/16"-20	3/4"	27/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	25	000000000	00000
			1/2"-20	7/8"	31/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	25	000000000	00000
			9/16"-12	15/16"	35/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	10	000000000	0000
			5/8"-18	1 1/16"	39/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	25	000000000	00000
			3/4"-16	1 1/4"	47/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	10	000000000	00000
			7/8"-14	1 7/16"	55/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	10	000000000	00000
			1"-12	1 5/8"	63/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1"-14	1 5/8"	63/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000


			1 1/8"-12	1 13/16"	1 7/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 1/4"-12	2"	1 7/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 3/8"-6	2 3/16"	1 11/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 3/8"-12	2 3/16"	1 11/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 5/8"-8	2 9/16"	1 19/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 7/8"-8	2 15/16"	1 27/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	00000
			2 1/4"-4 1/2	3 1/2"	2 13/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	00000
			2 1/4"-8	3 1/2"	2 13/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	00000
			2 1/2"-4	3 7/8"	2 29/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	00000

Low-Strength Steel

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these nuts to rust.

	Wd.	Ht.	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	1/4"-20	1/2"	15/64"	ASME B18.2.2	100	000000000	00000


	5/16"-18	9/16"	19/64"	ASME B18.2.2	100	000000000	0000
	3/8"-16	11/16"	23/64"	ASME B18.2.2	100	000000000	00000
	7/16"-14	3/4"	27/64"	ASME B18.2.2	50	000000000	00000
	1/2"-13	7/8"	31/64"	ASME B18.2.2	50	000000000	00000
	9/16"-12	15/16"	35/64"	ASME B18.2.2	25	000000000	00000
	5/8"-11	1 1/16"	39/64"	ASME B18.2.2	25	000000000	00000
	3/4"-10	1 1/4"	47/64"	ASME B18.2.2	10	000000000	00000
	7/8"-9	1 7/16"	55/64"	ASME B18.2.2	10	000000000	00000
	1"-8	1 5/8"	63/64"	ASME B18.2.2	5	000000000	00000
	1 1/8"-7	1 13/16"	1 7/64"	ASME B18.2.2	5	000000000	00000


	1 1/8"-8	1 13/16"	1 7/64"	ASME B18.2.2, SAE J995	1	000000000	00000
	1 1/4"-7	2"	1 7/32"	ASME B18.2.2, SAE J995	1	000000000	0000
	1 1/2"-6	2 3/8"	1 15/32"	ASME B18.2.2	1	000000000	0000
	1 7/8"-8	2 15/16"	1 27/32"	ASME B18.2.2, SAE J995	1	000000000	00000
	2"-4 1/2	3 1/8"	1 31/32"	ASME B18.2.2	1	000000000	00000


	Steel



			1/4"-20	1/2"	15/64"	ASME B18.2.2	100	000000000	0000


			5/16"-18	9/16"	19/64"	ASME B18.2.2	100	000000000	0000
			3/8"-16	11/16"	23/64"	ASME B18.2.2	100	000000000	00000
			7/16"-14	3/4"	27/64"	ASME B18.2.2	50	000000000	00000
			1/2"-13	7/8"	31/64"	ASME B18.2.2	50	000000000	00000
			9/16"-12	15/16"	35/64"	ASME B18.2.2, SAE J995	25	000000000	0000
			5/8"-11	1 1/16"	39/64"	ASME B18.2.2	25	000000000	00000
			3/4"-10	1 1/4"	47/64"	ASME B18.2.2	25	000000000	00000
			1"-8	1 5/8"	63/64"	ASME B18.2.2	5	000000000	00000
			1 1/8"-7	1 13/16"	1 7/64"	ASME B18.2.2	5	000000000	00000
			1 1/4"-7	2"	1 7/32"	ASME B18.2.2	5	000000000	00000


			1 3/8"-6	2 3/16"	1 11/32"	ASME B18.2.2	1	000000000	0000
			1 1/2"-6	2 3/8"	1 15/32"	ASME B18.2.2	1	000000000	0000
			2"-4 1/2	3 1/8"	1 31/32"	ASME B18.2.2	1	000000000	00000

Thin-Profile Hex Nuts

About half the height of standard-profile nuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against another hex nut to hold it in place.

Medium-Strength Steel

These Grade 5 or Class 04 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these nuts to rust.

	Thread Size	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		1/4"-20	7/16"	5/32"	SAE Grade 5	ASME B18.2.2	100	000000000	00000


		1/4"-28	7/16"	5/32"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		5/16"-18	1/2"	3/16"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		5/16"-24	1/2"	3/16"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
		3/8"-16	9/16"	7/32"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		3/8"-24	9/16"	7/32"	SAE Grade 5	ASME B18.2.2	100	000000000	00000
		7/16"-14	11/16"	1/4"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
		7/16"-20	11/16"	1/4"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
		1/2"-13	3/4"	5/16"	SAE Grade 5	ASME B18.2.2	50	000000000	00000
		1/2"-20	3/4"	5/16"	SAE Grade 5	ASME B18.2.2	50	000000000	00000
		9/16"-12	7/8"	5/16"	SAE Grade 5	ASME B18.2.2	25	000000000	00000


		9/16"-18	7/8"	5/16"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		5/8"-11	15/16"	3/8"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		5/8"-18	15/16"	3/8"	SAE Grade 5	ASME B18.2.2	25	000000000	00000
		3/4"-10	1 1/8"	27/64"	SAE Grade 5	ASME B18.2.2	20	000000000	00000
		3/4"-16	1 1/8"	27/64"	SAE Grade 5	ASME B18.2.2	20	000000000	00000
		7/8"-9	1 5/16"	31/64"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		7/8"-14	1 5/16"	31/64"	SAE Grade 5	ASME B18.2.2	10	000000000	00000
		1"-8	1 1/2"	35/64"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
		1"-12	1 1/2"	35/64"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
		1"-14	1 1/2"	35/64"	SAE Grade 5	ASME B18.2.2	5	000000000	00000


		1 1/8"-7	1 11/16"	39/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 1/8"-12	1 11/16"	39/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 1/4"-7	1 7/8"	23/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 1/4"-12	1 7/8"	23/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
		1 3/8"-6	2 1/16"	25/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
		1 3/8"-12	2 1/16"	25/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
		1 1/2"-6	2 1/4"	27/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
		1 1/2"-12	2 1/4"	27/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
		2"-4 1/2	3"	1 3/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
		2"-12	3"	1 3/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000


		3"-12	4 1/2"	1 21/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000


		Steel



				1/4"-20	7/16"	5/32"	SAE Grade 5	ASME B18.2.2	100	000000000	0000


				1/4"-28	7/16"	5/32"	SAE Grade 5	ASME B18.2.2	100	000000000	0000
				5/16"-18	1/2"	3/16"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
				5/16"-24	1/2"	3/16"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
				3/8"-16	9/16"	7/32"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
				3/8"-24	9/16"	7/32"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
				7/16"-14	11/16"	1/4"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
				7/16"-20	11/16"	1/4"	SAE Grade 5	ASME B18.2.2	50	000000000	0000
				1/2"-13	3/4"	5/16"	SAE Grade 5	ASME B18.2.2	25	000000000	0000
				1/2"-20	3/4"	5/16"	SAE Grade 5	ASME B18.2.2	25	000000000	0000
				9/16"-12	7/8"	5/16"	SAE Grade 5	ASME B18.2.2	25	000000000	00000


9/16"-18				7/8"	5/16"	SAE Grade 5	ASME B18.2.2	25	000000000	0000
5/8"-11	15/16"			3/8"	SAE Grade 5	ASME B18.2.2	10	000000000	0000
5/8"-18	15/16"			3/8"	SAE Grade 5	ASME B18.2.2	10	000000000	0000
3/4"-10	1 1/8"			27/64"	SAE Grade 5	ASME B18.2.2	10	000000000	0000
3/4"-16	1 1/8"			27/64"	SAE Grade 5	ASME B18.2.2	10	000000000	0000
7/8"-9	1 5/16"			31/64"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
7/8"-14	1 5/16"			31/64"	SAE Grade 5	ASME B18.2.2	5	000000000	0000
1"-8	1 1/2"			35/64"	SAE Grade 5	ASME B18.2.2	5	000000000	00000
1"-12	1 1/2"			35/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
1"-14	1 1/2"			35/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000


1 1/8"-7	1 11/16"			39/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
1 1/8"-12	1 11/16"			39/64"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
1 1/4"-7	1 7/8"			23/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
1 1/4"-12	1 7/8"			23/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000
1 3/8"-12	2 1/16"			25/32"	SAE Grade 5	ASME B18.2.2	1	000000000	00000
1 1/2"-12	2 1/4"			27/32"	SAE Grade 5	ASME B18.2.2	1	000000000	0000

High-Strength Steel

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these nuts to rust.

Zinc-Flake-Coated Steel—The most durable zinc coating, zinc flake is a multilayer finish that resists wear for long-term rust protection. Similar to zinc yellow-chromate, it won't hold up to harsh chemicals like stainless steel can.

	Thread Size	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		3/8"-24	9/16"	7/32"	SAE Grade 8	ASME B18.2.2	25	000000000	000000


		1/2"-13	3/4"	5/16"	SAE Grade 8	ASME B18.2.2	10	000000000	0000
		1/2"-20	3/4"	5/16"	SAE Grade 8	ASME B18.2.2	10	000000000	0000
		5/8"-18	15/16"	3/8"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
		3/4"-10	1 1/8"	27/64"	SAE Grade 8	ASME B18.2.2	5	000000000	0000
		1 1/8"-7	1 11/16"	39/64"	SAE Grade 8	ASME B18.2.2	1	000000000	00000


		Zinc-Yellow-Chromate-Plated Steel



				1/4"-20	7/16"	5/32"	SAE Grade 8	ASME B18.2.2	100	000000000	00000


				1/4"-28	7/16"	5/32"	SAE Grade 8	ASME B18.2.2	100	000000000	00000
				5/16"-18	1/2"	3/16"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
				5/16"-24	1/2"	3/16"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
				3/8"-16	9/16"	7/32"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
				3/8"-24	9/16"	7/32"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
				7/16"-14	11/16"	1/4"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
				7/16"-20	11/16"	1/4"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
				1/2"-13	3/4"	5/16"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
				1/2"-20	3/4"	5/16"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
				9/16"-12	7/8"	5/16"	SAE Grade 8	ASME B18.2.2	10	000000000	0000


				9/16"-18	7/8"	5/16"	SAE Grade 8	ASME B18.2.2	20	000000000	00000
				5/8"-11	15/16"	3/8"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
				5/8"-18	15/16"	3/8"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
				3/4"-10	1 1/8"	27/64"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
				3/4"-16	1 1/8"	27/64"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
				7/8"-9	1 5/16"	31/64"	SAE Grade 8	ASME B18.2.2	5	000000000	0000
				7/8"-14	1 5/16"	31/64"	SAE Grade 8	ASME B18.2.2	5	000000000	00000
				1"-8	1 1/2"	35/64"	SAE Grade 8	ASME B18.2.2	5	000000000	00000
				1"-14	1 1/2"	35/64"	SAE Grade 8	ASME B18.2.2	5	000000000	00000
				1 1/8"-7	1 11/16"	39/64"	SAE Grade 8	ASME B18.2.2	1	000000000	0000


				1 1/8"-12	1 11/16"	39/64"	SAE Grade 8	ASME B18.2.2	1	000000000	0000
				1 1/4"-7	1 7/8"	23/32"	SAE Grade 8	ASME B18.2.2	1	000000000	0000
				1 1/4"-12	1 7/8"	23/32"	SAE Grade 8	ASME B18.2.2	1	000000000	0000
				1 3/8"-6	2 1/16"	25/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
				1 1/2"-6	2 1/4"	27/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
				1 1/2"-12	2 1/4"	27/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
				1 3/4"-12	2 5/8"	31/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
				2"-4 1/2	3"	1 3/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000
				2"-12	3"	1 3/32"	SAE Grade 8	ASME B18.2.2	1	000000000	00000


				Steel



						1/4"-20	7/16"	5/32"	SAE Grade 8	ASME B18.2.2	50	000000000	0000


						1/4"-28	7/16"	5/32"	SAE Grade 8	ASME B18.2.2	50	000000000	0000
						5/16"-18	1/2"	3/16"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
5/16"-24						1/2"	3/16"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
3/8"-16	9/16"					7/32"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
3/8"-24	9/16"					7/32"	SAE Grade 8	ASME B18.2.2	50	000000000	00000
7/16"-14	11/16"					1/4"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
7/16"-20	11/16"					1/4"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
1/2"-13	3/4"					5/16"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
1/2"-20	3/4"					5/16"	SAE Grade 8	ASME B18.2.2	10	000000000	0000
5/8"-11	15/16"					3/8"	SAE Grade 8	ASME B18.2.2	10	000000000	00000


5/8"-18	15/16"					3/8"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
3/4"-10	1 1/8"					27/64"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
3/4"-16	1 1/8"					27/64"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
7/8"-9	1 5/16"					31/64"	SAE Grade 8	ASME B18.2.2	5	000000000	00000
7/8"-14	1 5/16"	31/64"				SAE Grade 8	ASME B18.2.2	5	000000000	00000
1"-8	1 1/2"	35/64"	SAE Grade 8			ASME B18.2.2	1	000000000	0000
1"-12	1 1/2"	35/64"	SAE Grade 8			ASME B18.2.2	1	000000000	0000
1"-14	1 1/2"	35/64"	SAE Grade 8			ASME B18.2.2	1	000000000	0000
1 1/8"-7	1 11/16"	39/64"	SAE Grade 8			ASME B18.2.2	1	000000000	0000
1 1/4"-12	1 7/8"	23/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000


1 3/8"-6	2 1/16"	25/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000
1 3/8"-12	2 1/16"	25/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000
1 1/2"-6	2 1/4"	27/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000
1 1/2"-12	2 1/4"	27/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000
1 3/4"-5	2 5/8"	31/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000
1 3/4"-12	2 5/8"	31/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000
2"-4 1/2	3"	1 3/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000
2"-12	3"	1 3/32"	SAE Grade 8			ASME B18.2.2	1	000000000	00000


Zinc-Flake-Coated Steel



		1/4"-20	7/16"			5/32"	SAE Grade 8	ASME B18.2.2	25	000000000	0000


		5/16"-18	1/2"			3/16"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
		3/8"-16	9/16"			7/32"	SAE Grade 8	ASME B18.2.2	25	000000000	00000
		1/2"-13	3/4"			5/16"	SAE Grade 8	ASME B18.2.2	10	000000000	0000
		5/8"-11	15/16"			3/8"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
		3/4"-10	1 1/8"			27/64"	SAE Grade 8	ASME B18.2.2	10	000000000	00000
		1"-8	1 1/2"			35/64"	SAE Grade 8	ASME B18.2.2	1	000000000	0000

Thin-Heavy-Profile Hex Nuts

About half the height of standard-profile hex nuts and 10% wider, these fit in spaces with low clearance and handle heavier loads by distributing them over a larger area. You can also use them as jam nuts by threading them against another hex nut to hold it in place.

Extreme-Strength Steel

These nuts are about 20% stronger than high-strength steel nuts. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these nuts to rust.

	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	1/4"-20	1/2"	11/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	000000


	5/16"-18	9/16"	13/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000
	3/8"-16	11/16"	15/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000
	1/2"-13	7/8"	19/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000
	5/8"-11	1 1/16"	23/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000
	3/4"-10	1 1/4"	27/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000


	Steel



			1/4"-20	1/2"	11/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000


			3/8"-16	11/16"	15/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000
			7/16"-14	3/4"	17/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1/2"-13	7/8"	19/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	5	000000000	00000
			5/8"-11	1 1/16"	23/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			3/4"-10	1 1/4"	27/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			7/8"-9	1 7/16"	31/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1"-8	1 5/8"	35/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 1/8"-7	1 13/16"	39/64"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 1/4"-7	2"	23/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 3/8"-6	2 3/16"	25/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000


			1 1/2"-6	2 3/8"	27/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	0000
			1 3/4"-5	2 3/4"	31/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	00000
			2"-4 1/2	3 1/8"	1 3/32"	ASTM Grade 2H	ASME B18.2.2, ASTM A194	1	000000000	00000

Coupling Nuts

Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.

Medium-Strength Steel

These Grade 5 or Class 8 nuts are about twice as strong as low-strength steel coupling nuts. Use them with threaded rods that have a comparable strength rating to avoid stripping threads during installation.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Black-Oxide Steel—A dark, matte coating creates a finished look. Nuts offer minimal corrosion resistance, so they're best for dry environments.

								Each
	Thread Size	Lg., mm	Wd., mm	Fastener Strength Grade/Class	Threading	Specs. Met		1-9	10-49	50-Up
Zinc-Plated Steel



		M5 × 0.8 mm	15	8	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	000000	000000	00000


		M14 × 2 mm	42	22	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
		M18 × 2.5 mm	54	27	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
		M22 × 2.5 mm	66	32	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000


		Black-Oxide Steel



				M5 × 0.8 mm	15	8	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	0000	0000


				M6 × 1 mm	18	10	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	0000
				M8 × 1.25 mm	24	13	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
				M10 × 1.5 mm	30	17	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
				M12 × 1.75 mm	36	19	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
				M14 × 2 mm	42	22	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
				M16 × 2 mm	48	24	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
				M18 × 2.5 mm	54	27	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
				M20 × 2.5 mm	60	30	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
				M24 × 3 mm	72	36	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000
				M30 × 3.5 mm	90	46	ISO Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	000000000	00000	00000	00000