Left-Hand Threaded Coupling Nuts

Filter by

System of Measurement

Thread Size

Hex Length

Material

Length

Nut Type

Hex Size

Thread Length

Finish

Thread Fit

Unified Standard Class 2B

Width

Pitch

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

Hardness

73 Products

Left-Hand to Right-Hand Female Hex Thread Adapters

Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.

Black-Oxide Steel—Choose black-oxide steel adapters to match the aesthetics of your system or for their mild corrosion resistance. The finish won't chip or rub off. They resist rust in indoor and dry environments, but avoid using them in corrosive environments.

Zinc-Plated Steel—Zinc-plated steel adapters are strong and corrosion resistant.

Aluminum—At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.

18-8 Stainless Steel—18-8 stainless steel adapters have good corrosion resistance.

316 Stainless Steel—316 stainless steel adapters have the best corrosion resistance. They stand up to wet environments, just like 18-8 stainless steel adapters, but unlike 18-8 stainless steel adapters, they resist corrosion caused by salt water and harsh chemicals.

			Thread Lg.		Thread Fit		Hex				Each
	Thread Size (A)	Thread Size (B)	(A)	(B)	(A)	(B)	Size	Length	Hardness		1-9	10-Up
Black-Oxide Steel



		10-24	10-24	3/8"	3/8"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	1 1/2"	Rockwell B80	000000000	000000	000000


		1/4"-20	1/4"-20	1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B80	000000000	00000	00000
		1/4"-28	1/4"-28	1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B80	000000000	00000	00000
		5/16"-18	5/16"-18	1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	7/16"	2"	Rockwell B80	000000000	00000	00000
		5/16"-24	5/16"-24	1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	7/16"	2"	Rockwell B80	000000000	00000	00000
		3/8"-16	3/8"-16	3/4"	3/4"	Unified Standard Class 2B	Unified Standard Class 2B	1/2"	2 1/2"	Rockwell B80	000000000	00000	00000
		3/8"-24	3/8"-24	3/4"	3/4"	Unified Standard Class 2B	Unified Standard Class 2B	1/2"	2 1/2"	Rockwell B80	000000000	00000	00000
		1/2"-13	1/2"-13	1"	1"	Unified Standard Class 2B	Unified Standard Class 2B	5/8"	3"	Rockwell B80	000000000	00000	00000
		3/4"-10	3/4"-10	1 1/2"	1 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 1/4"	5"	Rockwell B80	000000000	00000	00000
		7/8"-9	7/8"-9	1 1/2"	1 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 3/8"	5"	Rockwell B80	000000000	00000	00000
		1"-8	1"-8	1 1/2"	1 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 5/8"	5"	Rockwell B80	000000000	00000	00000


		M6 x 1 mm	M6 x 1 mm	8 mm	8 mm	Metric Class 6H	Metric Class 6H	10 mm	50 mm	Rockwell B80	000000000	00000	00000
		M8 x 1.25 mm	M8 x 1.25 mm	12 mm	12 mm	Metric Class 6H	Metric Class 6H	11 mm	50 mm	Rockwell B80	000000000	00000	00000
		M10 x 1.5 mm	M10 x 1.5 mm	20 mm	20 mm	Metric Class 6H	Metric Class 6H	16 mm	65 mm	Rockwell B80	000000000	00000	00000
		M12 x 1.75 mm	M12 x 1.75 mm	25 mm	25 mm	Metric Class 6H	Metric Class 6H	16 mm	75 mm	Rockwell B80	000000000	00000	00000


		Zinc-Plated Steel



				3/8"-16	3/8"-16	1 3/4"	1 3/4"	Unified Standard Class 2B	Unified Standard Class 2B	3/4"	4"	Rockwell B65	000000000	00000	00000


				1/2"-13	1/2"-13	1 3/4"	1 3/4"	Unified Standard Class 2B	Unified Standard Class 2B	7/8"	4"	Rockwell B65	000000000	00000	00000
				5/8"-11	5/8"-11	2 1/4"	2 1/4"	Unified Standard Class 2B	Unified Standard Class 2B	1 1/8"	5"	Rockwell B65	000000000	00000	00000
				3/4"-10	3/4"-10	2 1/4"	2 1/4"	Unified Standard Class 2B	Unified Standard Class 2B	1 1/4"	5"	Rockwell B65	000000000	00000	00000
				7/8"-9	7/8"-9	3 1/4"	3 1/4"	Unified Standard Class 2B	Unified Standard Class 2B	1 3/8"	7"	Rockwell B65	000000000	00000	00000
				1"-8	1"-8	3 1/4"	3 1/4"	Unified Standard Class 2B	Unified Standard Class 2B	1 5/8"	7"	Rockwell B65	000000000	00000	00000
				1 1/8"-7	1 1/8"-7	3 1/2"	3 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 3/4"	7 1/2"	Rockwell B65	000000000	00000	00000
				1 1/4"-7	1 1/4"-7	3 1/2"	3 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	2"	7 1/2"	Rockwell B65	000000000	00000	00000
				1 1/2"-6	1 1/2"-6	3 3/4"	3 3/4"	Unified Standard Class 2B	Unified Standard Class 2B	2 3/8"	8"	Rockwell B65	000000000	00000	00000


				Aluminum



						5-40	5-40	1/4"	1/4"	Unified Standard Class 2B	Unified Standard Class 2B	5/16"	1"	Rockwell B56	000000000	00000	0000


						6-32	6-32	1/4"	1/4"	Unified Standard Class 2B	Unified Standard Class 2B	5/16"	1"	Rockwell B56	000000000	00000	0000
						8-32	8-32	5/16"	5/16"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	1"	Rockwell B56	000000000	00000	00000
						10-32	10-32	3/8"	3/8"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	1 1/2"	Rockwell B56	000000000	00000	00000
						1/4"-20	1/4"-20	1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B56	000000000	00000	00000
						1/4"-28	1/4"-28	1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B56	000000000	00000	00000
						5/16"-24	5/16"-24	1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	7/16"	2"	Rockwell B56	000000000	00000	00000
						3/8"-16	3/8"-16	3/4"	3/4"	Unified Standard Class 2B	Unified Standard Class 2B	1/2"	2 1/2"	Rockwell B56	000000000	00000	00000
						3/8"-24	3/8"-24	3/4"	3/4"	Unified Standard Class 2B	Unified Standard Class 2B	1/2"	2 1/2"	Rockwell B56	000000000	00000	00000


						18-8 Stainless Steel



								4-40	4-40	1/4"	1/4"	Unified Standard Class 2B	Unified Standard Class 2B	5/16"	1"	Rockwell B80	000000000	0000	0000


6-32	6-32							1/4"	1/4"	Unified Standard Class 2B	Unified Standard Class 2B	5/16"	1"	Rockwell B80	000000000	0000	0000
8-32	8-32							5/16"	5/16"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	1"	Rockwell B80	000000000	0000	0000
10-24	10-24							3/8"	3/8"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	1 1/2"	Rockwell B80	000000000	0000	0000
10-32	10-32							3/8"	3/8"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	1 1/2"	Rockwell B80	000000000	0000	0000
12-24	12-24							1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B80	000000000	00000	00000
1/4"-20	1/4"-20							1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B80	000000000	0000	0000
1/4"-28	1/4"-28							1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B80	000000000	00000	00000
5/16"-18	5/16"-18							1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	7/16"	2"	Rockwell B80	000000000	0000	0000
5/16"-24	5/16"-24							1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	7/16"	2"	Rockwell B80	000000000	00000	00000
3/8"-16	3/8"-16							3/4"	3/4"	Unified Standard Class 2B	Unified Standard Class 2B	1/2"	2 1/2"	Rockwell B80	000000000	00000	00000


3/8"-24	3/8"-24							3/4"	3/4"	Unified Standard Class 2B	Unified Standard Class 2B	1/2"	2 1/2"	Rockwell B80	000000000	00000	00000
1/2"-13	1/2"-13							1"	1"	Unified Standard Class 2B	Unified Standard Class 2B	5/8"	3"	Rockwell B80	000000000	00000	00000
5/8"-11	5/8"-11							1 1/2"	1 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 1/8"	5"	Rockwell B80	000000000	00000	00000
3/4"-10	3/4"-10							1 1/2"	1 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 1/4"	5"	Rockwell B80	000000000	00000	00000
1"-8	1"-8							1 1/2"	1 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 5/8"	5"	Rockwell B80	000000000	00000	00000
M4 x 0.7 mm	M4 x 0.7 mm							8 mm	8 mm	Metric Class 6H	Metric Class 6H	10 mm	25 mm	Rockwell B80	000000000	0000	0000
M5 x 0.8 mm	M5 x 0.8 mm							8 mm	8 mm	Metric Class 6H	Metric Class 6H	10 mm	38 mm	Rockwell B80	000000000	0000	0000
M6 x 1 mm	M6 x 1 mm							8 mm	8 mm	Metric Class 6H	Metric Class 6H	10 mm	50 mm	Rockwell B80	000000000	00000	00000
M8 x 1.25 mm	M8 x 1.25 mm							12 mm	12 mm	Metric Class 6H	Metric Class 6H	11 mm	50 mm	Rockwell B80	000000000	00000	00000
M10 x 1.5 mm	M10 x 1.5 mm							20 mm	20 mm	Metric Class 6H	Metric Class 6H	16 mm	65 mm	Rockwell B80	000000000	00000	00000


M12 x 1.75 mm	M12 x 1.75 mm	25 mm						25 mm	Metric Class 6H	Metric Class 6H	16 mm	75 mm	Rockwell B80	000000000	00000	00000


316 Stainless Steel



		10-32	10-32					3/8"	3/8"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	1 1/2"	Rockwell B80	000000000	00000	00000


		12-24	12-24					1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B80	000000000	00000	00000
		1/4"-20	1/4"-20					1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B80	000000000	00000	00000
		1/4"-28	1/4"-28					1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	3/8"	2"	Rockwell B80	000000000	00000	00000
		5/16"-18	5/16"-18					1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	7/16"	2"	Rockwell B80	000000000	00000	00000
		5/16"-24	5/16"-24					1/2"	1/2"	Unified Standard Class 2B	Unified Standard Class 2B	7/16"	2"	Rockwell B80	000000000	00000	00000
		3/8"-16	3/8"-16					3/4"	3/4"	Unified Standard Class 2B	Unified Standard Class 2B	1/2"	2 1/2"	Rockwell B80	000000000	00000	00000
		3/8"-24	3/8"-24					3/4"	3/4"	Unified Standard Class 2B	Unified Standard Class 2B	1/2"	2 1/2"	Rockwell B80	000000000	00000	00000
		1/2"-13	1/2"-13					1"	1"	Unified Standard Class 2B	Unified Standard Class 2B	5/8"	3"	Rockwell B80	000000000	00000	00000
		5/8"-11	5/8"-11	1 1/2"				1 1/2"	Unified Standard Class 2B	Unified Standard Class 2B	1 1/8"	5"	Rockwell B80	000000000	00000	00000
		3/4"-10	3/4"-10	1 1/2"	1 1/2"			Unified Standard Class 2B	Unified Standard Class 2B	1 1/4"	5"	Rockwell B80	000000000	00000	00000

Left-Hand-Thread Coupling Nuts

Pair with left-hand threaded rods, and turn to the left to tighten. Also known as extension nuts, these are commonly used to connect lengths of threaded rod and join threaded parts.

Low-Strength Steel

Rated Grade 2 or lower, these are about half as strong as medium-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.

						Each
	Thread Size	Lg.	Wd.	Threading		1-9	10-Up
Zinc-Plated Steel



		3/8"-16	1 3/4"	5/8"	Fully Threaded	000000000	00000	00000


		1/2"-13	1 3/4"	11/16"	Fully Threaded	000000000	0000	0000
		5/8"-11	2 1/8"	13/16"	Fully Threaded	000000000	0000	0000
		3/4"-10	2 1/4"	1"	Fully Threaded	000000000	00000	00000
		7/8"-9	2 1/2"	1 1/4"	Fully Threaded	000000000	00000	00000
		1"-8	2 3/4"	1 3/8"	Fully Threaded	000000000	00000	00000
		1 1/4"-7	3"	1 5/8"	Fully Threaded	000000000	00000	00000