Left-Hand Threaded Hex Jam Nuts

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Export Control Classification Number (ECCN)

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208 Products

About Hex Nuts

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

Left-Hand-Thread Thin-Profile Hex Nuts

These nuts tighten when turned to the left. Use them with left-hand rods and screws to prevent counterclockwise-moving parts from loosening. 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.

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.

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



	1/4"-20	7/16"	5/32"	SAE Grade 5	—	100	000000000	000000


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


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


	1 1/4"-7	1 7/8"	23/32"	SAE Grade 5	—	1	000000000	0000
	1 1/4"-12	1 7/8"	23/32"	SAE Grade 5	—	1	000000000	00000
	1 1/2"-6	2 1/4"	27/32"	SAE Grade 5	—	1	000000000	00000
	1 1/2"-12	2 1/4"	27/32"	SAE Grade 5	—	1	000000000	00000
	2"-12	3"	1 3/32"	SAE Grade 5	—	1	000000000	000000


	Black-Oxide Steel



			M3 × 0.5 mm	5.5 mm	1.8 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000


			M5 × 0.8 mm	8 mm	2.7 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M6 × 0.75 mm	10 mm	3.2 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M8 × 1 mm	13 mm	4 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M8 × 1.25 mm	13 mm	4 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M10 × 1.5 mm	17 mm	5 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M12 × 1.75 mm	19 mm	6 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M14 × 1.5 mm	22 mm	7 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M16 × 1.5 mm	24 mm	8 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M16 × 2 mm	24 mm	8 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
			M18 × 2.5 mm	27 mm	9 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000


			M20 × 2.5 mm	30 mm	10 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
			M22 × 1.5 mm	32 mm	11 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
			M22 × 2.5 mm	32 mm	11 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
			M24 × 1.5 mm	36 mm	12 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
			M30 × 1.5 mm	46 mm	15 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
			M30 × 2 mm	46 mm	15 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
			M33 × 3.5 mm	50 mm	16.5 mm	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	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.

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

	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Steel



	5-40	5/16"	3/32"	SAE Grade 2	ASTM A108	1	000000000	00000


	8-32	11/32"	7/64"	SAE Grade 2	ASTM A108	1	000000000	0000
	10-24	3/8"	7/64"	SAE Grade 2	ASTM A108	1	000000000	0000
	10-32	3/8"	7/64"	SAE Grade 2	ASTM A108	1	000000000	0000
	3/8"-24	9/16"	7/32"	SAE Grade 2	ASTM A108	1	000000000	0000
	1/2"-13	3/4"	5/16"	SAE Grade 2	ASTM A108	1	000000000	0000
	1/2"-20	3/4"	5/16"	SAE Grade 2	ASTM A108	1	000000000	0000
	5/8"-11	15/16"	3/8"	SAE Grade 2	ASTM A108	1	000000000	0000
	7/8"-20	1 5/16"	31/64"	SAE Grade 2	ASTM A108	1	000000000	00000
	1"-12	1 1/2"	35/64"	SAE Grade 2	ASTM A108	1	000000000	00000
	1 1/4"-12	1 7/8"	23/32"	SAE Grade 2	ASTM A108	1	000000000	00000


	2"-4 1/2	3"	1 3/32"	SAE Grade 2	ASTM A108	1	000000000	00000
	2"-12	3"	1 3/32"	SAE Grade 2	ASTM A108	1	000000000	00000


	Steel



			1/4"-20	7/16"	5/32"	SAE Grade 2	—	50	000000000	0000


			1/4"-28	7/16"	5/32"	SAE Grade 2	—	100	000000000	00000
			5/16"-18	1/2"	3/16"	SAE Grade 2	—	50	000000000	0000
			5/16"-24	1/2"	3/16"	SAE Grade 2	—	100	000000000	00000
			3/8"-16	9/16"	7/32"	SAE Grade 2	—	25	000000000	0000
			3/8"-24	9/16"	7/32"	SAE Grade 2	—	50	000000000	00000
			1/2"-13	3/4"	5/16"	SAE Grade 2	—	25	000000000	00000
			1/2"-20	3/4"	5/16"	SAE Grade 2	—	25	000000000	00000
			5/8"-11	15/16"	3/8"	SAE Grade 2	—	10	000000000	00000
			5/8"-18	15/16"	3/8"	SAE Grade 2	—	10	000000000	00000
			3/4"-10	1 1/8"	27/64"	SAE Grade 2	—	10	000000000	00000


			3/4"-16	1 1/8"	27/64"	SAE Grade 2	—	10	000000000	00000
			1"-8	1 1/2"	35/64"	SAE Grade 2	—	5	000000000	00000
			1"-14	1 1/2"	35/64"	SAE Grade 2	—	5	000000000	00000

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

Highly-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these nuts won't degrade when exposed to harsh weather, salt water, and most chemicals.

	Thread Size	Wd.	Ht.	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



		4-40	1/4"	1/16"	—	1	000000000	00000


		5-40	5/16"	3/32"	—	1	000000000	0000
		6-32	5/16"	3/32"	—	1	000000000	0000
		10-24	3/8"	7/64"	—	1	000000000	0000
		12-24	7/16"	9/64"	—	1	000000000	0000
		1/4"-20	7/16"	5/32"	—	5	000000000	0000
		1/4"-28	7/16"	5/32"	—	5	000000000	0000
		5/16"-18	1/2"	3/16"	—	5	000000000	0000
		5/16"-24	1/2"	3/16"	—	5	000000000	0000
		3/8"-16	9/16"	7/32"	—	5	000000000	0000
		3/8"-24	9/16"	7/32"	—	5	000000000	0000


		7/16"-14	11/16"	1/4"	ASME B18.2.2	1	000000000	0000
		7/16"-20	11/16"	1/4"	ASME B18.2.2	1	000000000	0000
		1/2"-13	3/4"	5/16"	—	5	000000000	0000
		1/2"-20	3/4"	5/16"	—	5	000000000	00000
		9/16"-12	7/8"	5/16"	ASME B18.2.2	1	000000000	0000
		9/16"-18	7/8"	5/16"	ASME B18.2.2	1	000000000	0000
		5/8"-11	15/16"	3/8"	—	1	000000000	0000
		5/8"-18	15/16"	3/8"	—	1	000000000	0000
		3/4"-10	1 1/8"	27/64"	—	1	000000000	0000
		3/4"-16	1 1/8"	27/64"	—	1	000000000	0000


		7/8"-9	1 5/16"	31/64"	ASME B18.2.2	1	000000000	00000
		7/8"-14	1 5/16"	31/64"	ASME B18.2.2	1	000000000	00000
		7/8"-20	1 5/16"	31/64"	ASME B18.2.2	1	000000000	00000
		1"-8	1 1/2"	35/64"	ASME B18.2.2	1	000000000	00000
		1"-12	1 1/2"	35/64"	ASME B18.2.2	1	000000000	00000
		1"-14	1 1/2"	35/64"	ASME B18.2.2	1	000000000	00000
		1 1/4"-12	1 7/8"	23/32"	ASME B18.2.2	1	000000000	00000
		1 1/2"-6	2 1/4"	27/32"	ASME B18.2.2	1	000000000	00000
		1 1/2"-12	2 1/4"	27/32"	ASME B18.2.2	1	000000000	00000
		2"-4 1/2	3"	1 3/32"	ASME B18.2.2	1	000000000	00000


		2"-12	3"	1 3/32"	ASME B18.2.2	1	000000000	00000
		M3 × 0.5 mm	5.5 mm	1.8 mm	DIN 439B	1	000000000	0000
		M4 × 0.5 mm	7 mm	2.2 mm	DIN 439B	1	000000000	0000
		M4 × 0.7 mm	7 mm	2.2 mm	DIN 439B	1	000000000	0000
		M5 × 0.5 mm	8 mm	2.7 mm	DIN 439B	1	000000000	0000
		M5 × 0.8 mm	8 mm	2.7 mm	DIN 439, ISO 4035	10	000000000	0000
		M6 × 0.75 mm	10 mm	3.2 mm	DIN 439B	1	000000000	0000
		M6 × 1 mm	10 mm	3.2 mm	DIN 439, ISO 4035	10	000000000	0000
		M6 × 1 mm	10 mm	3.2 mm	DIN 439B	1	000000000	0000
		M8 × 1 mm	13 mm	4 mm	DIN 439, ISO 4035	5	000000000	0000


		M8 × 1.25 mm	13 mm	4 mm	DIN 439, ISO 4035	10	000000000	0000
		M8 × 1.25 mm	13 mm	4 mm	DIN 439B	1	000000000	0000
		M10 × 1 mm	17 mm	5 mm	DIN 439B	1	000000000	0000
		M10 × 1.25 mm	17 mm	5 mm	DIN 439, ISO 4035	1	000000000	0000
		M10 × 1.5 mm	17 mm	5 mm	DIN 439, ISO 4035	5	000000000	0000
		M10 × 1.5 mm	17 mm	5 mm	DIN 439B	1	000000000	0000
		M12 × 1.25 mm	19 mm	6 mm	DIN 439, ISO 4035	1	000000000	0000
		M12 × 1.75 mm	19 mm	6 mm	DIN 439, ISO 4035	1	000000000	0000
		M12 × 1.75 mm	19 mm	6 mm	DIN 439B	1	000000000	0000
		M14 × 1.5 mm	22 mm	7 mm	DIN 439B	1	000000000	0000

M14 × 2 mm	22 mm	7 mm	DIN 439, ISO 4035	1	000000000	0000
M16 × 1.5 mm	24 mm	8 mm	DIN 439, ISO 4035	1	000000000	0000
M16 × 1.5 mm	24 mm	8 mm	DIN 439B	1	000000000	0000
M16 × 2 mm	24 mm	8 mm	DIN 439, ISO 4035	1	000000000	0000
M16 × 2 mm	24 mm	8 mm	DIN 439B	1	000000000	0000
M20 × 1.5 mm	30 mm	10 mm	DIN 439B	1	000000000	00000
M20 × 2.5 mm	30 mm	10 mm	DIN 439, ISO 4035	1	000000000	0000
M22 × 1.5 mm	32 mm	11 mm	DIN 439B	1	000000000	00000
M22 × 2.5 mm	32 mm	11 mm	DIN 439B	1	000000000	00000
M24 × 1.5 mm	36 mm	12 mm	DIN 439B	1	000000000	00000
M24 × 3 mm	36 mm	12 mm	DIN 439, ISO 4035	1	000000000	00000
M27 × 1.5 mm	41 mm	13.5 mm	DIN 439B	1	000000000	00000
M30 × 1.5 mm	46 mm	15 mm	DIN 439B	1	000000000	00000
M30 × 2 mm	46 mm	15 mm	DIN 439B	1	000000000	00000

Highly-Corrosion-Resistant 316 Stainless Steel



		4-40	1/4"	1/16"	—	1	000000000	0000


		6-32	5/16"	3/32"	—	1	000000000	0000
		8-32	11/32"	7/64"	—	1	000000000	0000
		10-24	3/8"	7/64"	—	1	000000000	0000
		10-32	3/8"	7/64"	—	1	000000000	0000
		1/4"-20	7/16"	5/32"	—	1	000000000	0000
		1/4"-28	7/16"	5/32"	—	1	000000000	0000
		5/16"-24	1/2"	3/16"	—	1	000000000	0000
		3/8"-16	9/16"	7/32"	—	1	000000000	0000
		3/8"-24	9/16"	7/32"	—	1	000000000	0000
		7/16"-20	11/16"	1/4"	—	1	000000000	0000


		1/2"-13	3/4"	5/16"	—	1	000000000	0000
		1/2"-20	3/4"	5/16"	—	1	000000000	0000
		9/16"-18	7/8"	5/16"	—	1	000000000	00000
		5/8"-18	15/16"	3/8"	—	1	000000000	00000
		3/4"-10	1 1/8"	27/64"	—	1	000000000	00000
		3/4"-16	1 1/8"	27/64"	—	1	000000000	00000
		1"-12	1 1/2"	35/64"	—	1	000000000	00000
		1"-14	1 1/2"	35/64"	—	1	000000000	00000
		1 1/4"-12	1 7/8"	23/32"	—	1	000000000	00000
		1 1/2"-6	2 1/4"	27/32"	—	1	000000000	00000


		2"-12	3"	1 3/32"	—	1	000000000	00000
		M6 × 0.75 mm	10 mm	3.2 mm	DIN 439B, ISO 4035	1	000000000	0000
		M6 × 1 mm	10 mm	3.2 mm	DIN 439B, ISO 4035	1	000000000	0000
		M8 × 1 mm	13 mm	4 mm	DIN 439B, ISO 4035	1	000000000	0000
		M8 × 1.25 mm	13 mm	4 mm	DIN 439B, ISO 4035	1	000000000	0000
		M10 × 1 mm	17 mm	5 mm	DIN 439B, ISO 4035	1	000000000	0000
		M10 × 1.25 mm	17 mm	5 mm	DIN 439B	1	000000000	0000
		M12 × 1.25 mm	19 mm	6 mm	DIN 439B	1	000000000	0000
		M12 × 1.5 mm	19 mm	6 mm	DIN 439B, ISO 4035	1	000000000	0000
		M12 × 1.75 mm	19 mm	6 mm	DIN 439B, ISO 4035	1	000000000	0000


		M14 × 1.5 mm	22 mm	7 mm	DIN 439B, ISO 4035	1	000000000	00000
		M16 × 1.5 mm	24 mm	8 mm	DIN 439B, ISO 4035	1	000000000	00000
		M16 × 2 mm	24 mm	8 mm	DIN 439B, ISO 4035	1	000000000	00000
		M18 × 1.5 mm	27 mm	9 mm	DIN 439B, ISO 4035	1	000000000	00000
		M20 × 1.5 mm	30 mm	10 mm	DIN 439B, ISO 4035	1	000000000	00000
		M22 × 1.5 mm	32 mm	11 mm	DIN 439B, ISO 4035	1	000000000	00000
		M24 × 2 mm	36 mm	12 mm	DIN 439B, ISO 4035	1	000000000	00000

Corrosion-Resistant Stainless Steel with Material Certificate

18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.

Highly-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these nuts won't degrade when exposed to harsh weather, salt water, and most chemicals.

	Wd.	Ht.	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel



	8-32	11/32"	7/64"	—	1	000000000	00000


	10-32	3/8"	7/64"	—	1	000000000	0000
	1 1/4"-7	1 7/8"	23/32"	ASME B18.2.2	1	000000000	00000
	M3 × 0.35 mm	5.5 mm	1.8 mm	DIN 439B	1	000000000	0000
	M5 × 0.8 mm	8 mm	2.7 mm	DIN 439B	1	000000000	0000
	M27 × 2 mm	41 mm	13.5 mm	DIN 439B	1	000000000	00000


	Highly-Corrosion-Resistant 316 Stainless Steel



			M5 × 0.5 mm	8 mm	2.7 mm	DIN 439B, ISO 4035	1	000000000	0000


			M10 × 1.5 mm	17 mm	5 mm	DIN 439B, ISO 4035	1	000000000	0000
			M30 × 1.5 mm	46 mm	15 mm	DIN 439B, ISO 4035	1	000000000	00000

Brass

Brass—Conductive and nonmagnetic, brass nuts are commonly used to secure electrical equipment, such as circuit board assemblies and mounting brackets, inside enclosures. They're also softer than most metals, so they won't damage other fastening components.

	Wd.	Ht.	Specs. Met		Each
Brass



	6-32	5/16"	3/32"	—	000000000	00000


	10-32	3/8"	7/64"	—	000000000	0000
	5/8"-18	15/16"	3/8"	—	000000000	00000
	3/4"-10	1 1/8"	27/64"	—	000000000	00000
	1"-12	1 1/2"	35/64"	—	000000000	00000
	1"-14	1 1/2"	35/64"	—	000000000	00000
	M5 × 0.8 mm	8 mm	2.7 mm	DIN 439B, ISO 4035	000000000	0000
	M6 × 1 mm	10 mm	3.2 mm	DIN 439B, ISO 4035	000000000	0000
	M14 × 1.5 mm	22 mm	7 mm	DIN 439B, ISO 4035	000000000	00000
	M16 × 1.5 mm	24 mm	8 mm	DIN 439B, ISO 4035	000000000	00000

Low-Strength Steel with Material Certificate

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	Wd.	Ht.	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Steel



	5/16"-24	1/2"	3/16"	SAE Grade 2	ASTM A108	1	000000000	00000


	3/8"-16	9/16"	7/32"	SAE Grade 2	ASTM A108	1	000000000	0000
	1 1/4"-7	1 7/8"	23/32"	SAE Grade 2	ASTM A108	1	000000000	00000
	1 1/2"-6	2 1/4"	27/32"	SAE Grade 2	ASTM A108	1	000000000	00000

Brass with Material Certificate

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	Wd.	Ht.	Specs. Met		Each
Brass



	8-32	11/32"	7/64"	—	000000000	00000


	1 1/4"-7	1 7/8"	23/32"	—	000000000	00000
	1 1/2"-12	2 1/4"	27/32"	—	000000000	00000
	M18 × 1.5 mm	27 mm	9 mm	DIN 439B, ISO 4035	000000000	00000

Medium-Strength Steel with Material Certificate

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.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	Wd., mm	Ht., mm	Fastener Strength Grade/Class	Specs. Met	Pkg. Qty.		Pkg.
Black-Oxide Steel



	M5 × 0.5 mm	8	2.7	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000


	M10 × 1 mm	17	5	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
	M18 × 1.5 mm	27	9	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	0000
	M20 × 1.5 mm	30	10	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
	M27 × 1.5 mm	41	13.5	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
	M27 × 2 mm	41	13.5	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000
	M30 × 3.5 mm	46	15	ISO Class 04	ASTM A108, DIN 439B, ISO 4035	1	000000000	00000