Arc Studs | McMaster-Carr

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136 Products

Weld Studs


Below-Head Projection	Above-Head Projection

Weld in place for greater rigidity and strength than other studs. These studs have a wide base that distributes the load and projections that concentrate the weld. Length listed is overall length.

Steel—Without a finish, these studs require minimal prep work before welding. After installation, you can paint them for a finished look.

Below-Head Projection—Choose these studs for a strong hold that uses the full strength of the fastener. Pass through a hole and weld them in place.

Above-Head Projection—Weld the head directly to the surface of the material for a smooth appearance.

			Base
	Lg.	Projection Location	Dia.	Thk.	Tensile Strength, psi	Hardness	Pkg. Qty.		Pkg.
Steel







				6-32

				1/2"	Below Head	0.323"	0.052"	60,000	Not Rated	100	000000000	00000


				5/8"	Below Head	0.323"	0.052"	60,000	Not Rated	100	000000000	0000
				3/4"	Below Head	0.323"	0.052"	60,000	Not Rated	100	000000000	0000




						8-32

						3/8"	Below Head	0.385"	0.068"	60,000	Not Rated	100	000000000	0000


						3/8"	Above Head	0.323"	0.052"	60,000	Not Rated	100	000000000	0000
						1/2"	Below Head	0.385"	0.068"	60,000	Not Rated	100	000000000	0000
						3/4"	Below Head	0.385"	0.068"	60,000	Not Rated	100	000000000	0000
						1"	Below Head	0.385"	0.068"	60,000	Not Rated	100	000000000	0000




								10-24

								3/8"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	0000


								1/2"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	0000
								1/2"	Above Head	0.385"	0.068"	60,000	Not Rated	100	000000000	0000
								5/8"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	00000
								3/4"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	00000
								3/4"	Above Head	0.385"	0.068"	60,000	Not Rated	100	000000000	00000
								1"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	00000
								1 1/4"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	00000




										10-32

										3/8"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	0000


										1/2"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	0000
										1/2"	Above Head	0.385"	0.068"	60,000	Not Rated	100	000000000	0000
										5/8"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	0000
										5/8"	Above Head	0.385"	0.068"	60,000	Not Rated	100	000000000	00000
										3/4"	Below Head	0.448"	0.068"	60,000	Not Rated	100	000000000	00000
										3/4"	Above Head	0.385"	0.068"	60,000	Not Rated	100	000000000	00000
										1"	Below Head	0.448"	0.068"	Not Rated	Not Rated	50	000000000	0000
										1"	Above Head	0.385"	0.068"	60,000	Not Rated	100	000000000	00000




1/4"-20

3/8"	Below Head											0.575"	0.083"	Not Rated	Not Rated	50	000000000	0000


3/8"	Above Head											0.51"	0.083"	60,000	Not Rated	50	000000000	0000
1/2"	Below Head	0.575"										0.083"	Not Rated	Not Rated	50	000000000	0000
1/2"	Above Head	0.51"	0.083"									60,000	Not Rated	50	000000000	0000
5/8"	Below Head	0.575"	0.083"									Not Rated	Not Rated	50	000000000	0000
5/8"	Above Head	0.51"	0.083"									60,000	Not Rated	50	000000000	0000
3/4"	Below Head	0.575"	0.083"									Not Rated	Not Rated	50	000000000	00000
3/4"	Above Head	0.51"	0.083"									60,000	Not Rated	50	000000000	0000
7/8"	Below Head	0.575"	0.083"									60,000	Not Rated	25	000000000	00000
1"	Below Head	0.575"	0.083"									Not Rated	Not Rated	50	000000000	00000
1"	Above Head	0.51"	0.083"									60,000	Not Rated	50	000000000	00000


1 1/4"	Below Head	0.575"	0.083"	60,000								Not Rated	25	000000000	0000
1 1/2"	Below Head	0.575"	0.083"	60,000	Not Rated							25	000000000	0000
1 3/4"	Below Head	0.575"	0.083"	60,000	Not Rated							25	000000000	0000
2"	Below Head	0.575"	0.083"	60,000	Not Rated							25	000000000	00000




		5/16"-18

		3/4"	Below Head	0.755"	0.099"							60,000	Not Rated	25	000000000	00000


		3/4"	Above Head	0.63"	0.099"							60,000	Not Rated	5	000000000	0000
		1"	Below Head	0.755"	0.099"	60,000						Not Rated	5	000000000	0000
		1 1/4"	Below Head	0.755"	0.099"	60,000	Not Rated					25	000000000	00000
		2"	Below Head	0.755"	0.099"	60,000	Not Rated					5	000000000	00000




				3/8"-16

				1"	Below Head	0.88"	0.114"					60,000	Not Rated	10	000000000	0000


				1 1/4"	Below Head	0.88"	0.114"					60,000	Not Rated	5	000000000	0000
				1 1/2"	Below Head	0.88"	0.114"					60,000	Not Rated	10	000000000	0000
				1 3/4"	Below Head	0.88"	0.114"					60,000	Not Rated	10	000000000	0000




						1/2"-13

						1 1/4"	Below Head	1.005"	0.146"			60,000	Not Rated	5	000000000	00000




								M3.5

								8 mm	Above Head			7 mm	1.1 mm	Not Rated	Not Rated	10	000000000	0000


								25 mm	Above Head			7 mm	1.1 mm	Not Rated	Not Rated	10	000000000	0000




										M4

										6 mm	Above Head	8 mm	1.2 mm	Not Rated	Not Rated	10	000000000	0000


										8 mm	Above Head	8 mm	1.2 mm	Not Rated	Not Rated	10	000000000	0000
										10 mm	Above Head	8 mm	1.2 mm	Not Rated	Not Rated	10	000000000	0000

Weld Anchors for Concrete

Also known as Nelson studs, these anchors strengthen the connection between steel framing and concrete. Weld them to the framing to enhance adhesion and resist shear forces. Their heads ensure secure embedding when wet concrete is poured. A ferrule is included if you choose to weld with a stud welder. Designed for permanent installations, you'd have to cut these anchors out to remove them.

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

		Head			Ultimate Strength
	Lg.	Dia.	Ht.	Tensile Strength, psi	Pull-Out	Shear	Ferrule Material	Specs. Met	Pkg. Qty.		Pkg.
Steel







				1/4" Diameter

				4 1/8"	1/2"	0.187"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	000000000	00000




						3/8" Diameter

						2 1/8"	3/4"	0.281"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	000000000	0000


						3 1/8"	3/4"	0.281"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	000000000	0000
						4 1/8"	3/4"	0.281"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	000000000	00000
						6 1/8"	3/4"	0.281"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	000000000	00000




								1/2" Diameter

								2 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	000000000	00000


								3 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	000000000	00000
								4 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	000000000	00000
								5 5/16"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	0000
								6 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	0000
								8 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000




										5/8" Diameter

										4 3/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000


										5 3/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
										6 3/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
										6 9/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
										8 3/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000




												3/4" Diameter

												3 3/16"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000


												3 3/8"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
												4 3/16"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
												4 3/8"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
												4 7/8"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
												5 3/16"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
												5 3/8"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
5 7/8"												1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
6 3/16"	1 1/4"											0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000
8 3/16"	1 1/4"											0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000
9 3/16"	1 1/4"											0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000




		7/8" Diameter

		4 3/16"	1 3/8"									0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	000000000	00000


		5 3/16"	1 3/8"	0.375"								65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000
		6 3/16"	1 3/8"	0.375"	65,000							Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000
		7 3/16"	1 3/8"	0.375"	65,000							Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000
		8 3/16"	1 3/8"	0.375"	65,000							Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000
		9 3/16"	1 3/8"	0.375"	65,000							Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000




				1" Diameter

				4 1/4"	1 5/8"							0.5"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000


				6 1/4"	1 5/8"	0.5"	65,000					Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000
				8 1/4"	1 5/8"	0.5"	65,000					Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	000000000	0000

90° Angle Weld Studs

Weld these studs to flat surfaces in confined areas, narrow channels, and tight corners.

Steel—Without a finish, these studs require minimal prep work before welding. After installation, you can paint them for a finished look.

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

		Base
	Lg.	Lg.	Wd.	Thk.	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
Steel







				6-32

				1/2"	9/16"	7/32"	3/64"	Not Rated	Not Rated	50	000000000	000000




						8-32

						1/2"	5/8"	1/4"	1/16"	Not Rated	Not Rated	50	000000000	00000




								10-24

								1/2"	11/16"	5/16"	1/16"	Not Rated	Not Rated	50	000000000	00000




										10-32

										1/2"	11/16"	11/32"	1/16"	Not Rated	Not Rated	50	000000000	00000




												1/4"-20

												1/2"	3/4"	3/8"	3/32"	Not Rated	Not Rated	25	000000000	0000


												5/8"	3/4"	3/8"	3/32"	Not Rated	Not Rated	25	000000000	0000
												3/4"	3/4"	3/8"	3/32"	Not Rated	Not Rated	25	000000000	0000
												1"	3/4"	3/8"	3/32"	Not Rated	Not Rated	25	000000000	00000


												18-8 Stainless Steel







																6-32

																3/8"	9/16"	7/32"	3/64"	Not Rated	Not Rated	25	000000000	00000


																1/2"	9/16"	7/32"	3/64"	Not Rated	Not Rated	25	000000000	00000




																		8-32

3/8"	5/8"																	1/4"	1/16"	Not Rated	Not Rated	25	000000000	00000


1/2"	5/8"																	1/4"	1/16"	Not Rated	Not Rated	25	000000000	00000
5/8"	5/8"	1/4"																1/16"	Not Rated	Not Rated	10	000000000	0000
3/4"	5/8"	1/4"	1/16"															Not Rated	Not Rated	10	000000000	0000
1"	5/8"	1/4"	1/16"															Not Rated	Not Rated	10	000000000	0000
1 1/4"	5/8"	1/4"	1/16"															Not Rated	Not Rated	10	000000000	0000
1 1/2"	5/8"	1/4"	1/16"															Not Rated	Not Rated	10	000000000	0000




		10-24

		3/8"	11/16"	5/16"	1/16"													Not Rated	Not Rated	10	000000000	0000


		1/2"	11/16"	5/16"	1/16"													Not Rated	Not Rated	10	000000000	0000
		3/4"	11/16"	5/16"	1/16"	Not Rated												Not Rated	10	000000000	0000
		1"	11/16"	5/16"	1/16"	Not Rated	Not Rated											10	000000000	0000
		1 1/4"	11/16"	5/16"	1/16"	Not Rated	Not Rated											10	000000000	0000




				10-32

				3/8"	11/16"	11/32"	1/16"	Not Rated	Not Rated									10	000000000	0000


				1/2"	11/16"	11/32"	1/16"	Not Rated	Not Rated									10	000000000	0000
				3/4"	11/16"	11/32"	1/16"	Not Rated	Not Rated									10	000000000	0000
				1"	11/16"	11/32"	1/16"	Not Rated	Not Rated									10	000000000	0000
				1 1/4"	11/16"	11/32"	1/16"	Not Rated	Not Rated	10								000000000	00000
				1 3/4"	11/16"	11/32"	1/16"	Not Rated	Not Rated	10	000000000							00000




						1/4"-20

						1/2"	3/4"	3/8"	3/32"	Not Rated	Not Rated							10	000000000	00000


						5/8"	3/4"	3/8"	3/32"	Not Rated	Not Rated							10	000000000	00000
						3/4"	3/4"	3/8"	3/32"	Not Rated	Not Rated							10	000000000	00000
						7/8"	3/4"	3/8"	3/32"	Not Rated	Not Rated							10	000000000	00000
						1"	3/4"	3/8"	3/32"	Not Rated	Not Rated	5						000000000	0000
						1 1/4"	3/4"	3/8"	3/32"	Not Rated	Not Rated	5	000000000					0000
						1 1/2"	3/4"	3/8"	3/32"	Not Rated	Not Rated	5	000000000					0000
						1 3/4"	3/4"	3/8"	3/32"	Not Rated	Not Rated	5	000000000					0000




								5/16"-18

								5/8"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	000000000			0000


								3/4"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	000000000			0000
								1"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	000000000			0000
								1 1/4"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	000000000			0000
								1 1/2"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	000000000	00000
								2"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	000000000	00000




										3/8"-16

										1"	1"	17/32"	5/32"	Not Rated	Not Rated	5	000000000	00000


1 1/4"										1"	17/32"	5/32"	Not Rated	Not Rated	5	000000000	00000
1 1/2"	1"									17/32"	5/32"	Not Rated	Not Rated	5	000000000	00000