Grade 5 Steel Coupling Nuts

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112 Products

Coupling Nuts

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	Min. Thread Lg.	Specs. Met		1-9	10-49	50-Up
Zinc-Plated Steel



		5/8"-11	5"	1 1/8"	Partially Threaded	2 3/8"	—	90264A233	000000	000000	000000


		3/4"-10	5"	1 1/4"	Partially Threaded	2 3/8"	—	90264A244	00000	00000	00000
		1 3/4"-5	5"	2 3/8"	Fully Threaded	—	—	90264A300	00000	00000	00000
		M5 × 0.8 mm	15 mm	8 mm	Fully Threaded	—	DIN 6334	93355A320	0000	0000	0000
		M5 × 0.8 mm	30 mm	8 mm	Fully Threaded	—	—	90264A806	0000	0000	0000

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.

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



		8-32	5/8"	1/2"	SAE Grade 5	Fully Threaded	—	90977A013	00000	00000	00000


		10-24	3/4"	1/2"	SAE Grade 5	Fully Threaded	—	90977A017	0000	0000	0000
		10-32	3/4"	1/2"	SAE Grade 5	Fully Threaded	—	90977A021	0000	0000	0000
		1/4"-20	7/8"	1/2"	SAE Grade 5	Fully Threaded	—	90977A130	0000	0000	0000
		1/4"-28	7/8"	1/2"	SAE Grade 5	Fully Threaded	—	90977A140	0000	0000	0000
		5/16"-18	1 1/8"	1/2"	SAE Grade 5	Fully Threaded	—	90977A150	0000	0000	0000
		5/16"-24	1 1/8"	1/2"	SAE Grade 5	Fully Threaded	—	90977A160	0000	0000	0000
		3/8"-16	1 3/4"	5/8"	SAE Grade 5	Fully Threaded	—	90977A165	0000	0000	0000
		3/8"-24	1 3/4"	5/8"	SAE Grade 5	Fully Threaded	—	90977A170	0000	0000	0000
		7/16"-14	1 3/4"	5/8"	SAE Grade 5	Fully Threaded	—	90977A180	0000	0000	0000
		7/16"-20	1 3/4"	5/8"	SAE Grade 5	Fully Threaded	—	90977A190	0000	0000	0000


		1/2"-13	1 3/4"	3/4"	SAE Grade 5	Fully Threaded	—	90977A195	0000	0000	0000
		1/2"-20	1 3/4"	3/4"	SAE Grade 5	Fully Threaded	—	90977A034	0000	0000	0000
		5/8"-11	2 1/8"	13/16"	SAE Grade 5	Fully Threaded	—	90977A205	0000	0000	0000
		5/8"-18	2 1/8"	13/16"	SAE Grade 5	Fully Threaded	—	90977A210	0000	0000	0000
		3/4"-10	2 1/4"	1"	SAE Grade 5	Fully Threaded	—	90977A215	0000	0000	0000
		3/4"-16	2 1/4"	1"	SAE Grade 5	Fully Threaded	—	90977A220	00000	00000	0000
		7/8"-9	2 1/2"	1 1/4"	SAE Grade 5	Fully Threaded	—	90977A037	00000	00000	00000
		7/8"-14	2 1/2"	1 1/4"	SAE Grade 5	Fully Threaded	—	90977A225	00000	00000	00000
		1"-8	2 3/4"	1 3/8"	SAE Grade 5	Fully Threaded	—	90977A038	00000	00000	00000
		1"-14	2 3/4"	1 3/8"	SAE Grade 5	Fully Threaded	—	90977A230	00000	00000	00000


		1 1/8"-7	3"	1 1/2"	SAE Grade 5	Fully Threaded	—	90977A235	00000	00000	00000
		1 1/4"-7	3"	1 5/8"	SAE Grade 5	Fully Threaded	—	90977A240	00000	00000	00000
		1 1/2"-6	3 1/2"	2"	SAE Grade 5	Fully Threaded	—	90977A245	00000	00000	00000
		M5 × 0.8 mm	15 mm	8 mm	Class 8	Fully Threaded	ASME B18.2.2, DIN 6334	90009A231	00000	00000	0000

Female Threaded Hex Standoffs


		Fully Threaded	Threaded on Both Ends

Stack male-threaded components and create a clean, flush connection between them. To securely tighten standoffs, grip the flat sides of the hex body with a wrench.

Zinc-Plated Carbon Steel—Best for dry environments since moisture will cause these standoffs to rust.

								Each
	Lg.	Hex Size	Threading	Thread Lg., mm	Min. Thread Lg.	Specs. Met		1-99	100-499	500-Up
Zinc-Plated Carbon Steel







				10-32

				5"	1/2"	Threaded on Both Ends	—	1/2"	—	92230A053	000000	00000	00000


				5"	5/8"	Threaded on Both Ends	—	1/2"	—	91920A213	00000	00000	0000




						1/4"-20

						5"	1/2"	Threaded on Both Ends	—	5/8"	—	92230A054	00000	0000	0000


						5"	5/8"	Threaded on Both Ends	—	5/8"	—	91920A214	00000	00000	0000




								3/8"-16

								5"	5/8"	Threaded on Both Ends	—	5/8"	—	91920A215	00000	00000	0000




										M3 × 0.5 mm

										5 mm	4.5 mm	Fully Threaded	5	—	ASTM A108	91920A543	0000	0000	0000


										5 mm	6 mm	Fully Threaded	5	—	ASTM A108	91920A587	0000	0000	0000




												M3.5 × 0.6 mm

												5 mm	6 mm	Fully Threaded	5	—	ASTM A108	91920A588	0000	0000	0000




														M4 × 0.7 mm

														5 mm	6 mm	Fully Threaded	5	—	ASTM A108	91920A589	0000	0000	0000




																M5 × 0.8 mm

																6 mm	10 mm	Fully Threaded	6	—	ASTM A108	91920A683	0000	0000	0000


																7 mm	10 mm	Fully Threaded	7	—	ASTM A108	91920A684	0000	0000	0000
8 mm																10 mm	Fully Threaded	8	—	ASTM A108	91920A686	0000	0000	0000
9 mm	10 mm															Fully Threaded	9	—	ASTM A108	91920A687	0000	0000	0000
10 mm	10 mm															Fully Threaded	10	—	ASTM A108	91920A689	0000	0000	0000
12 mm	10 mm															Fully Threaded	12	—	ASTM A108	91920A691	0000	0000	0000
14 mm	10 mm															Fully Threaded	14	—	ASTM A108	91920A693	0000	0000	0000
16 mm	10 mm	Fully Threaded														16	—	ASTM A108	91920A695	0000	0000	0000
18 mm	10 mm	Fully Threaded	18													—	ASTM A108	91920A696	0000	0000	0000
19 mm	10 mm	Fully Threaded	19													—	ASTM A108	91920A698	0000	0000	0000
20 mm	10 mm	Fully Threaded	20													—	ASTM A108	91920A997	0000	0000	0000


22 mm	10 mm	Fully Threaded	22													—	ASTM A108	91920A701	0000	0000	0000
24 mm	10 mm	Fully Threaded	24													—	ASTM A108	91920A702	0000	0000	0000
25 mm	10 mm	Fully Threaded	25													—	ASTM A108	91920A704	0000	0000	0000
26 mm	10 mm	Fully Threaded	26													—	ASTM A108	91920A705	0000	0000	0000
28 mm	10 mm	Fully Threaded	28	—												ASTM A108	91920A706	0000	0000	0000
30 mm	10 mm	Threaded on Both Ends	—	12.7 mm	ASTM A108											91920A707	0000	0000	0000
35 mm	10 mm	Threaded on Both Ends	—	12.7 mm	ASTM A108											91920A708	0000	0000	0000
37 mm	10 mm	Threaded on Both Ends	—	12.7 mm	ASTM A108											91920A710	0000	0000	0000
40 mm	10 mm	Threaded on Both Ends	—	12.7 mm	ASTM A108											91920A711	0000	0000	0000
45 mm	10 mm	Threaded on Both Ends	—	12.7 mm	ASTM A108											91920A712	0000	0000	0000


50 mm	10 mm	Threaded on Both Ends	—	12.7 mm	ASTM A108											91920A713	0000	0000	0000
51 mm	10 mm	Threaded on Both Ends	—	12.7 mm	ASTM A108											91920A714	0000	0000	0000
52 mm	10 mm	Threaded on Both Ends	—	12.7 mm	ASTM A108	91920A715										0000	0000	0000

Rod End Nuts

Attach these nuts to rods, pipes, and tubes to make pivoting and hinge movements where misalignment is not a concern. They’re often used to control air- and hydraulic-powered arms as well as other components in power transmission systems. Made of zinc-plated steel, these nuts resist being dislodged. They’re heavy, however, and may corrode over time as the plating wears down.

Round Shank

	ID, mm	Overall Dia., mm	Shank Ctr. Lg., mm	Shank Thread Lg., mm	Tensile Strength	Material		Each
Right-Hand Shank Thread



	M5 × 0.8 mm	6.1	10	16	8	Not Rated	Zinc-Plated Steel	5621N12	00000

Tapered Shank

	ID, mm	Overall Wd., mm	Overall Thk., mm	Shank Ctr. Lg., mm	Shank Thread Lg., mm	Tensile Strength	Material		Each
Right-Hand Shank Thread



	M5 × 0.8 mm	8.1	15	10	16	8	Not Rated	Zinc-Plated Steel	5621N13	00000

Metric-to-Metric Female Hex Thread Adapters

Increase or decrease metric thread size from one male-threaded part to another. Commonly used to connect two differently sized threaded rods, these adapters have a hex-shaped body, so you can tighten them with a standard wrench. You can also use them to change thread pitch or convert a male-threaded connection to a female-threaded connection. Small adapters can work as threaded standoffs, positioning and separating circuit boards and other components in assemblies.

Zinc-Plated Steel—Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.

ASTM A108 and ASTM B633—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.

			Thread Lg., mm		Thread Fit		Hex, mm								Each
	Thread Size (A)	Thread Size (B)	(A)	(B)	(A)	(B)	Size	Length	Specs. Met	Tensile Strength, psi	Hardness	Certificate Form	Certificate Type		1-9	10-Up
Zinc-Plated Steel



		M5 x 0.8 mm	M3 x 0.5 mm	12.7	6.4	Metric Class 6H	Metric Class 6H	10	50	ASTM A108, ASTM B633	78,000	Rockwell B85	—	—	92912A107	000000	000000


		M5 x 0.8 mm	M3.5 x 0.6 mm	12.7	9.5	Metric Class 6H	Metric Class 6H	10	50	ASTM A108, ASTM B633	78,000	Rockwell B85	Digital	Material Certificate with Traceable Lot Number	92912A108	00000	00000
		M5 x 0.8 mm	M4 x 0.7 mm	12.7	11.1	Metric Class 6H	Metric Class 6H	10	50	ASTM A108, ASTM B633	78,000	Rockwell B85	—	—	92912A109	00000	00000
		M6 x 1 mm	M5 x 0.8 mm	16	12.7	Metric Class 6H	Metric Class 6H	13	50	ASTM A108, ASTM B633	78,000	Rockwell B85	—	—	92912A112	00000	00000
		M8 x 1.25 mm	M5 x 0.8 mm	16	12.7	Metric Class 6H	Metric Class 6H	13	50	ASTM A108, ASTM B633	78,000	Rockwell B85	—	—	92912A116	00000	00000

Metric-to-Metric Male-Female Hex Thread Adapters

In addition to joining male- and female-threaded parts, these adapters can increase or decrease metric thread sizes and change the thread pitch. You can also use the smaller adapters as threaded standoffs, positioning and separating circuit boards and other components in assemblies.

Zinc-Plated Steel—Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.

ASTM A108 and ASTM B633—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.

			Thread Lg., mm		Gender		Thread Fit		Hex, mm
	Thread Size (A)	Thread Size (B)	(A)	(B)	(A)	(B)	(A)	(B)	Size	Length	Specs. Met	Tensile Strength, psi	Hardness		Each
Zinc-Plated Steel



		M3 x 0.5 mm	M5 x 0.8 mm	4.8	12.7	Male	Female	Metric Class 6g	Metric Class 6H	10	25	ASTM A108, ASTM B633	75,000	Rockwell B65	91408A107	00000


		M3.5 x 0.6 mm	M5 x 0.8 mm	6.4	12.7	Male	Female	Metric Class 6g	Metric Class 6H	10	25	ASTM A108, ASTM B633	75,000	Rockwell B65	91408A108	0000
		M5 x 0.8 mm	M3 x 0.5 mm	9.5	6.4	Male	Female	Metric Class 6g	Metric Class 6H	10	25	ASTM A108, ASTM B633	75,000	Rockwell B65	91408A105	0000
		M5 x 0.8 mm	M4 x 0.7 mm	9.5	11.1	Male	Female	Metric Class 6g	Metric Class 6H	10	25	ASTM A108, ASTM B633	75,000	Rockwell B65	91408A106	0000
		M5 x 0.8 mm	M8 x 1.25 mm	9.5	16	Male	Female	Metric Class 6g	Metric Class 6H	13	25	ASTM A108, ASTM B633	75,000	Rockwell B65	91408A116	0000
		M6 x 1 mm	M5 x 0.8 mm	12.7	12.7	Male	Female	Metric Class 6g	Metric Class 6H	13	25	ASTM A108, ASTM B633	75,000	Rockwell B65	91408A110	0000
		M8 x 1.25 mm	M5 x 0.8 mm	12.7	12.7	Male	Female	Metric Class 6g	Metric Class 6H	13	25	ASTM A108, ASTM B633	75,000	Rockwell B65	91408A112	0000

Press-Fit Threaded Standoffs


	Open End	Closed End


Fully Threaded	Partially Threaded

Create permanent connections without welding, tapping, or installing extra hardware. Press the standoff into an unthreaded hole, then clinch the head using a lever press. The recessed head clinches into sheet metal for a flush, snag-free finish that resists pushing, pulling, and twisting. Also known as captive standoffs.

Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

Open End—Create a through hole for two-end mounting or to connect longer screws.

Closed End—Get a clean, finished look and block oil and moisture from getting inside your assembly.

								Open End					Closed End
	Lg., mm	Hex Size, mm	OD, mm	For Hole Dia., mm	For Min. Panel Thk., mm	Thread Lg., mm	Threading	Min. Thread Lg., mm	PEM® Part No.	Pkg. Qty.		Pkg.	Min. Thread Lg., mm	PEM® Part No.	Pkg. Qty.		Pkg.
Zinc-Plated Steel







				M5 × 0.8 mm

				6	7.9	7.1	7.1	1.3	6	Fully Threaded	—	SO-M5-6ZI	10	93090A111	00000	—	—	—	———	0


				8	7.9	7.1	7.1	1.3	8	Fully Threaded	—	SO-M5-8ZI	10	93090A112	0000	—	—	—	———	0
				10	7.9	7.1	7.1	1.3	—	Partially Threaded	6	SO-M5-10ZI	10	93090A113	0000	4	BSO-M5-10ZI	5	93090A701	00000
				12	7.9	7.1	7.1	1.3	—	Partially Threaded	—	—	—	———	0	5	BSO-M5-12ZI	5	93090A702	0000
				14	7.9	7.1	7.1	1.3	—	Partially Threaded	10	SO-M5-14ZI	5	93090A114	0000	6	BSO-M5-14ZI	5	93090A703	0000
				16	7.9	7.1	7.1	1.3	—	Partially Threaded	—	—	—	———	0	6	BSO-M5-16ZI	5	93090A704	0000
				20	7.9	7.1	7.1	1.3	—	Partially Threaded	—	—	—	———	0	9	BSO-M5-20ZI	5	93090A705	0000

Inch-to-Metric Male-Female Hex Thread Adapters

Change inch threads to metric with these adapters, or swap metric threads for inch. An external hex lets you tighten or loosen them with a wrench. You can also use them to increase or reduce your thread size, or to create space between parts in an assembly.

Zinc-Plated Steel—Zinc-plated steel adapters should be used in mostly dry environments. The zinc plating offers temporary rust protection, but once it wears away the steel will rust.

ASTM A108 and ASTM B633—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.

			Thread Lg.		Gender		Thread Fit		Hex
	Thread Size (A)	Thread Size (B)	(A)	(B)	(A)	(B)	(A)	(B)	Size	Length	Specs. Met	Tensile Strength, psi	Hardness		Each
Zinc-Plated Steel







				Inch to Metric

				4-40	M5 x 0.8 mm	3/16"	12.7 mm	Male	Female	Unified Standard Class 2A	Metric Class 6H	3/8"	1"	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A125	00000


				6-32	M5 x 0.8 mm	1/4"	12.7 mm	Male	Female	Unified Standard Class 2A	Metric Class 6H	3/8"	1"	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A126	0000
				10-32	M5 x 0.8 mm	3/8"	12.7 mm	Male	Female	Unified Standard Class 2A	Metric Class 6H	3/8"	1"	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A127	0000
				1/4"-20	M5 x 0.8 mm	1/2"	12.7 mm	Male	Female	Unified Standard Class 2A	Metric Class 6H	1/2"	1"	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A135	0000
				5/16"-18	M5 x 0.8 mm	1/2"	12.7 mm	Male	Female	Unified Standard Class 2A	Metric Class 6H	1/2"	1"	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A137	0000




						Metric to Inch

						M5 x 0.8 mm	4-40	9.5 mm	1/4"	Male	Female	Metric Class 6g	Unified Standard Class 2B	10 mm	25 mm	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A128	0000


						M5 x 0.8 mm	6-32	9.5 mm	3/8"	Male	Female	Metric Class 6g	Unified Standard Class 2B	10 mm	25 mm	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A129	0000
						M5 x 0.8 mm	8-32	9.5 mm	7/16"	Male	Female	Metric Class 6g	Unified Standard Class 2B	10 mm	25 mm	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A130	0000
						M5 x 0.8 mm	10-32	9.5 mm	1/2"	Male	Female	Metric Class 6g	Unified Standard Class 2B	10 mm	25 mm	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A133	0000
						M5 x 0.8 mm	5/16"-18	9.5 mm	5/8"	Male	Female	Metric Class 6g	Unified Standard Class 2B	13 mm	25 mm	ASTM A108, ASTM B633	78,000	Rockwell B85	91648A153	0000

Inch-to-Metric Female Hex Thread Adapters

Adapt threaded rods from inch to metric. These adapters connect two male-threaded fasteners, so you can change the gender of a mating part or increase or decrease its thread size. The hex-shaped body fits into the head of a standard wrench. Small adapters can also be used as standoffs, positioning and separating circuit boards and other components in assemblies.

Zinc-Plated Steel—Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.

ASTM A108 and ASTM B633—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.

			Thread Lg.		Thread Fit		Hex								Each
	Thread Size (A)	Thread Size (B)	(A)	(B), mm	(A)	(B)	Size	Length	Specs. Met	Tensile Strength, psi	Hardness	Certificate Form	Certificate Type		1-9	10-Up
Zinc-Plated Steel



		4-40	M5 x 0.8 mm	1/4"	12.7	Unified Standard Class 2B	Metric Class 6H	3/8"	2"	ASTM A108, ASTM B633	78,000	Rockwell B85	Digital	Material Certificate with Traceable Lot Number	91082A130	000000	000000


		6-32	M5 x 0.8 mm	3/8"	12.7	Unified Standard Class 2B	Metric Class 6H	3/8"	2"	ASTM A108, ASTM B633	78,000	Rockwell B85	Digital	Material Certificate with Traceable Lot Number	91082A131	00000	00000
		8-32	M5 x 0.8 mm	0.437"	12.7	Unified Standard Class 2B	Metric Class 6H	3/8"	2"	ASTM A108, ASTM B633	78,000	Rockwell B85	—	—	91082A132	00000	00000
		10-32	M5 x 0.8 mm	1/2"	12.7	Unified Standard Class 2B	Metric Class 6H	3/8"	2"	ASTM A108, ASTM B633	78,000	Rockwell B85	—	—	91082A114	00000	00000
		1/4"-20	M5 x 0.8 mm	5/8"	12.7	Unified Standard Class 2B	Metric Class 6H	1/2"	2 1/2"	ASTM A108, ASTM B633	78,000	Rockwell B85	—	—	91082A118	00000	00000
		5/16"-18	M5 x 0.8 mm	5/8"	12.7	Unified Standard Class 2B	Metric Class 6H	1/2"	2 1/2"	ASTM A108, ASTM B633	78,000	Rockwell B85	Digital	Material Certificate with Traceable Lot Number	91082A121	00000	00000

Metric-to-Metric Male Hex Thread Adapters

Twist these adapters onto female metric threads to change pitch or switch thread sizes. They can also be used as standoffs to make space between parts. Tighten or loosen with a wrench.

Zinc-Plated Steel—Zinc-plated steel adapters should be used in mostly dry environments. The zinc plating offers temporary rust protection, but once it wears away the steel will rust.

ASTM A108 and ASTM B633—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.

			Thread Lg., mm		Thread Fit		Hex, mm
	Thread Size (A)	Thread Size (B)	(A)	(B)	(A)	(B)	Size	Length	Specs. Met	Tensile Strength, psi	Hardness	Certificate Form	Certificate Type		Each
Zinc-Plated Steel



		M3 x 0.5 mm	M5 x 0.8 mm	4.8	9.5	Metric Class 6g	Metric Class 6g	10	6.35	ASTM A108, ASTM B633	75,000	Rockwell B65	—	—	93048A107	00000


		M4 x 0.7 mm	M5 x 0.8 mm	9.5	9.5	Metric Class 6g	Metric Class 6g	10	6.35	ASTM A108, ASTM B633	75,000	Rockwell B65	—	—	93048A108	0000
		M5 x 0.8 mm	M6 x 1 mm	9.5	12.7	Metric Class 6g	Metric Class 6g	13	6.35	ASTM A108, ASTM B633	75,000	Rockwell B65	—	—	93048A111	00000
		M5 x 0.8 mm	M8 x 1.25 mm	9.5	12.7	Metric Class 6g	Metric Class 6g	13	6.35	ASTM A108, ASTM B633	75,000	Rockwell B65	Digital	Material Certificate with Traceable Lot Number	93048A115	00000

Inch-to-Metric Male Hex Thread Adapters

One side inch, one side metric, and a hex in the middle—these handy fasteners connect two female-threaded parts, such as coupling nuts, adapting from inch threads to metric. Tighten with a standard wrench.

You can also use these adapters to change the gender of a mating part or increase or decrease its thread size. The small sizes work as standoffs, positioning and separating circuit boards and other components in assemblies.

Zinc-Plated Steel—Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.

ASTM A108 and ASTM B633—Adapters that meet ASTM specifications are made from or plated with materials that adhere to specific standards for chemical and physical properties, such as hardness.

			Thread Lg.		Thread Fit		Hex
	Thread Size (A)	Thread Size (B)	(A)	(B), mm	(A)	(B)	Size	Length	Specs. Met	Tensile Strength, psi	Hardness		Each
Zinc-Plated Steel



		4-40	M5 x 0.8 mm	3/16"	9.5	Unified Standard Class 2A	Metric Class 6g	3/8"	1/4"	ASTM A108, ASTM B633	78,000	Rockwell B85	91091A612	00000


		6-32	M5 x 0.8 mm	1/4"	9.5	Unified Standard Class 2A	Metric Class 6g	3/8"	1/4"	ASTM A108, ASTM B633	78,000	Rockwell B85	91091A613	0000
		8-32	M5 x 0.8 mm	3/8"	9.5	Unified Standard Class 2A	Metric Class 6g	3/8"	1/4"	ASTM A108, ASTM B633	78,000	Rockwell B85	91091A614	0000
		10-32	M5 x 0.8 mm	3/8"	9.5	Unified Standard Class 2A	Metric Class 6g	3/8"	1/4"	ASTM A108, ASTM B633	78,000	Rockwell B85	91091A552	0000
		1/4"-20	M5 x 0.8 mm	1/2"	9.5	Unified Standard Class 2A	Metric Class 6g	1/2"	1/4"	ASTM A108, ASTM B633	78,000	Rockwell B85	91091A556	0000
		5/16"-18	M5 x 0.8 mm	1/2"	9.5	Unified Standard Class 2A	Metric Class 6g	1/2"	1/4"	ASTM A108, ASTM B633	78,000	Rockwell B85	91091A558	00000