7/16"-20 Standoffs | McMaster-Carr

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55 Products

Hex Drive Thread Adapters


	Unthreaded Tip

A hex drive on one end allows these adapters to be turned with a hex key for ease of installation. Use them to connect parts with coarse threads to parts with fine threads. They're high-strength black-oxide steel and corrosion resistant in dry environments.

Unthreaded Tip—Adapters with an unthreaded tip thread into nuts more easily, reducing the chance of damaging threads.

			Thread Lg.
	Thread Size (A)	Thread Size (B)	(A)	(B)	Lg.	Unthreaded Tip Length	Drive Size	Tensile Strength, psi	Hardness		Each
Black-Oxide Alloy Steel







				Thread Adapters

				7/16"-14	7/16"-20	7/16"	1"	2"	—	3/32"	150,000	Rockwell C39	94358A451	00000


				7/16"-14	7/16"-20	3/4"	1"	2 1/2"	—	3/16"	150,000	Rockwell C39	94358A458	0000
				7/16"-14	7/16"-20	3/4"	1"	2 3/4"	—	3/16"	150,000	Rockwell C39	94358A459	0000
				7/16"-14	7/16"-20	3/4"	1"	3 1/4"	—	3/16"	150,000	Rockwell C39	94358A460	0000
				7/16"-14	7/16"-20	1"	1"	3 1/2"	—	3/16"	150,000	Rockwell C39	94358A461	0000
				7/16"-14	7/16"-20	1"	1"	3 3/4"	—	3/16"	150,000	Rockwell C39	94358A462	0000
				7/16"-14	7/16"-20	1"	1"	4"	—	3/16"	150,000	Rockwell C39	94358A463	0000
				7/16"-14	7/16"-20	1"	1"	4 1/2"	—	3/16"	150,000	Rockwell C39	94358A464	0000




						Unthreaded Tip

						7/16"-14	7/16"-20	1 7/16"	1"	3 1/8"	3/8"	3/16"	150,000	Rockwell C39	94358A457	0000


						7/16"-14	7/16"-20	1 5/8"	1 1/8"	3 3/4"	5/16"	3/16"	150,000	Rockwell C39	94358A452	00000
						7/16"-14	7/16"-20	1 5/8"	1 1/8"	5 1/2"	5/16"	3/16"	150,000	Rockwell C39	94358A453	00000
						7/16"-14	7/16"-20	1 5/8"	1 1/8"	5 7/8"	5/16"	3/16"	150,000	Rockwell C39	94358A454	00000
						7/16"-14	7/16"-20	1 5/8"	1 1/8"	7"	5/16"	3/16"	150,000	Rockwell C39	94358A455	00000
						7/16"-14	7/16"-20	1 5/8"	1 1/8"	7 7/8"	5/16"	3/16"	150,000	Rockwell C39	94358A456	00000

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		1-9	10-49	50-Up
Zinc-Plated Steel



		7/16"-20	1 1/4"	9/16"	Fully Threaded	90264A115	00000	00000	00000


		7/16"-20	1 3/4"	5/8"	Fully Threaded	90264A480	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		1-9	10-49	50-Up
Zinc-Plated Steel



		7/16"-20	1 3/4"	5/8"	SAE Grade 5	Fully Threaded	90977A190	00000	00000	00000

High-Strength Steel

Rated Grade 8 or Class 10, these are about 25% stronger than 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.	Fastener Strength Grade/Class	Threading		1-9	10-49	50-Up
Zinc-Plated Steel



		7/16"-20	1 3/4"	3/4"	SAE Grade 8	Fully Threaded	90983A214	000000	000000	000000

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—The most corrosion-resistant stainless steel coupling nuts we offer, these hold up in just about any environment. They won't degrade from exposure to weather, salt water, and most chemicals.

							Each
	Thread Size	Lg.	Wd.	Threading	Min. Thread Lg.		1-9	10-49	50-Up
18-8 Stainless Steel



		7/16"-20	1 1/4"	9/16"	Fully Threaded	—	90268A340	00000	00000	00000


		7/16"-20	4"	5/8"	Partially Threaded	5/8"	90268A425	00000	00000	00000
		7/16"-20	6"	5/8"	Partially Threaded	5/8"	90268A427	00000	00000	00000


		Highly Corrosion-Resistant 316 Stainless Steel



				7/16"-20	1 1/4"	9/16"	Fully Threaded	—	90104A112	0000	0000	0000

Brass

Brass—With a warm, polished look, these nuts are often chosen for their appearance. Similar to 18-8 stainless steel, brass is corrosion resistant enough to stand up to wet environments. It is also softer than other metals, so it's easier to thread together.

						Each
	Thread Size	Lg.	Wd.	Threading		1-9	10-49	50-Up
Brass



		7/16"-20	1 1/4"	9/16"	Fully Threaded	90465A320	000000	00000	00000

High-Profile Hex Nuts

Slightly taller than standard-profile hex nuts, these have a larger gripping area so your wrench or socket won't slip off as you tighten them. They're often used in vehicles and machinery where fasteners can be difficult to reach.

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.

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

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



	7/16"-20	5/8"	39/64"	SAE Grade 8	SAE J995	25	90565A325	000000

Reinforced Threaded-Hole Bumpers

Style 1

With a metal base plate for added strength, these bumpers withstand repeated impacts for a longer service life than all-rubber bumpers. You can also use them as spacers and noise reducers. Twist them onto a threaded stud on your equipment, or pair them with your own stud to create a custom-length bumper.

Multipurpose Neoprene About Multipurpose Neoprene

Style 1

A good choice for oily equipment that's exposed to sunlight, rain, and ozone. These aren't as oil resistant as Buna-N bumpers, but they can be used outdoors.

Hardness Rating—The harder the bumper, the better it withstands impact and abrasion over time. The softer the bumper, the more cushioning it provides for objects made of glass, soft metal, and other fragile materials. Bumpers with a medium rating offer a balance of impact resistance and cushioning.

	Thread
	Size	Dp.	OD	Ht.	Hardness	Hardness Rating	Color	Temp., ° F	Base Plate Material	Nonmarking	For Use Outdoors		Each
Style 1



		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 40A	Medium Soft	Black	-40 to 200	Steel	No	Yes	9546K71	000000


		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 75A	Hard	Black	-40 to 200	Steel	No	Yes	9546K519	00000

Abrasion-Resistant Polyurethane Rubber About Abrasion-Resistant Polyurethane Rubber

Style 1

Our toughest rubber bumpers, they keep their shape even when knocked and scraped by metal and other abrasive materials. They're often used on industrial vehicles, conveyors, and heavy construction equipment.

	Thread
	Size	Dp.	OD	Ht.	Hardness	Hardness Rating	Color	Temp., ° F	Base Plate Material	Nonmarking	For Use Outdoors		Each
Style 1



		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 30A	Soft	Red	-40 to 200	Steel	No	Yes	9223K136	000000


		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 40A	Medium Soft	Red	-40 to 200	Steel	No	Yes	9223K9	00000
		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 50A	Medium	Red	-40 to 200	Steel	No	Yes	9223K163	00000
		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 60A	Medium Hard	Black	-40 to 200	Steel	No	Yes	9546K442	00000
		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 85A	Hard	Red	-40 to 200	Steel	No	Yes	9546K81	00000
		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 95A	Extra Hard	Black	-40 to 200	Steel	No	Yes	9546K454	00000

Oil-Resistant Buna-N About Oil-Resistant Buna-N

Style 1

These bumpers resist oil and fuels better than other rubber bumpers. Use them on frequently lubricated machinery and oily equipment, such as engines and pumps.

	Thread												Each
	Size	Dp.	OD	Ht.	Hardness	Hardness Rating	Color	Temp., ° F	Base Plate Material	Nonmarking	For Use Outdoors		1-11	12-Up
Style 1



		7/16"-20	1/2"	1 1/4"	1 1/4"	Durometer 40A	Medium Soft	White	-60 to 175	Steel	Yes	No	9546K33	000000	000000

Tube End Weld Nuts

Weld these nuts into tube ends to attach threaded fittings such as rod ends. The welded connection is stronger than tapping a tube directly. These nuts are often used to link control arms and suspensions. Also known as tube adapters and weldable threaded tube ends.

	Threading	Thread Lg.		Each
4130 Alloy Steel







	For 5/8" OD Tubes

	0.058"	7/16"-20	1"	Fully Threaded	1"	94640A170	00000




			For 3/4" OD Tubes

			0.058"	7/16"-20	1"	Fully Threaded	1"	94640A210	0000


			0.065"	7/16"-20	1 3/8"	Partially Threaded	1 1/8"	94640A230	0000




					For 7/8" OD Tubes

					0.058"	7/16"-20	1 3/8"	Partially Threaded	1 1/8"	94640A155	0000


					0.065"	7/16"-20	1 3/8"	Partially Threaded	1"	94640A260	0000
					0.083"	7/16"-20	1 1/2"	Partially Threaded	1 1/8"	94640A320	0000




							For 1" OD Tubes

							0.058"	7/16"-20	1 1/2"	Partially Threaded	1"	94640A370	0000


							0.065"	7/16"-20	1 1/2"	Partially Threaded	1"	94640A390	0000
							0.083"	7/16"-20	1 1/2"	Partially Threaded	1"	94640A430	0000
							0.095"	7/16"-20	1 1/2"	Partially Threaded	1"	94640A450	0000

Left-Hand-Thread Tube End Weld Nuts

These weld nuts prevent fasteners from backing out of assemblies that rotate counterclockwise. Their left-hand threads pair with left-hand screws and rods to stop the fastener from loosening as the assembly turns. Weld them to the end of a tube for a stronger connection than tapping the tube directly. Also known as tube adapters and weldable threaded tube ends.

	Threading	Thread Lg.		Each
4130 Alloy Steel







	For 5/8" OD Tubes

	0.058"	7/16"-20	1"	Fully Threaded	1"	94640A104	00000




			For 3/4" OD Tubes

			0.058"	7/16"-20	1"	Fully Threaded	1"	94640A107	0000


			0.065"	7/16"-20	1 3/8"	Partially Threaded	1 1/8"	94640A108	0000




					For 7/8" OD Tubes

					0.058"	7/16"-20	1 3/8"	Partially Threaded	1 1/8"	94640A159	0000


					0.065"	7/16"-20	1 3/8"	Partially Threaded	1"	94640A201	0000
					0.083"	7/16"-20	1 1/2"	Partially Threaded	1 1/8"	94640A204	0000




							For 1" OD Tubes

							0.065"	7/16"-20	1 1/2"	Partially Threaded	1"	94640A209	0000


							0.095"	7/16"-20	1 1/2"	Partially Threaded	1"	94640A304	0000

Square Weld Nuts

With four symmetrical projections, these nuts create the strongest hold in our offering. Unlike rectangular weld nuts, each projection is equidistant from the threads, so welds wrap evenly for extra strength and twist resistance. Projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. All nuts have a collar pilot that guides them into the hole, holds them in place while welding, and protects the threads from weld spatter.

Steel—Best for dry environments since moisture will cause them to rust. Made of uncoated steel, these nuts require minimal prep. Weld them to uncoated steel surfaces.

				Collar
	Thread Size	Wd.	Ht.	Dia.	Ht.	For Hole Dia.	Specs. Met	Pkg. Qty.		Pkg.
Steel



		7/16"-20	3/4"	5/16"	21/32"	0.063"	43/64"	ASME B1.1	25	93975A360	000000


		7/16"-20	3/4"	5/16"	21/32"	0.094"	43/64"	ASME B1.1	10	93975A115	00000

Weld Nuts

Add permanent threads to thin metal with our go-to weld nuts. Unlike press-fit and rivet nuts, these nuts fuse to the base metal, so they won’t twist and pull out. Three evenly spaced projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. All have a collar pilot that guides the nut into the hole, holds it in place while welding, and protects the threads from weld spatter. You can also install them on thick pieces of metal.

Steel—Best for dry environments since moisture will cause them to rust. Made of uncoated steel, these nuts require minimal prep. Weld them to uncoated steel surfaces.

				Collar
	Thread Size	Wd.	Ht.	Dia.	Ht.	For Hole Dia.	Specs. Met	Pkg. Qty.		Pkg.
Steel



		7/16"-20	3/4"	21/64"	21/32"	0.05"	43/64"	ASME B1.1	25	93560A270	000000


		7/16"-20	3/4"	21/64"	21/32"	0.085"	43/64"	ASME B1.1	10	93560A115	00000