Arc Studs | McMaster-Carr

Filter by

System of Measurement

Thread Size

Material

Projection Location

Diameter

Base Diameter

Thread Spacing

Thread Type

Head Diameter

Base Thickness

Thread Fit

Unified Standard Class 2A

Unified Standard Class 3A

Tensile Strength

Specifications Met

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

RoHS

Head Height

Base Length

Base Width

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	93865A310	00000


				5/8"	Below Head	0.323"	0.052"	60,000	Not Rated	100	93865A120	0000
				3/4"	Below Head	0.323"	0.052"	60,000	Not Rated	100	93865A320	0000




						8-32

						3/8"	Below Head	0.385"	0.068"	60,000	Not Rated	100	93865A135	0000


						3/8"	Above Head	0.323"	0.052"	60,000	Not Rated	100	93865A550	0000
						1/2"	Below Head	0.385"	0.068"	60,000	Not Rated	100	93865A330	0000
						3/4"	Below Head	0.385"	0.068"	60,000	Not Rated	100	93865A340	0000
						1"	Below Head	0.385"	0.068"	60,000	Not Rated	100	93865A155	0000




								10-24

								3/8"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A160	0000


								1/2"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A165	0000
								1/2"	Above Head	0.385"	0.068"	60,000	Not Rated	100	93865A570	0000
								5/8"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A170	00000
								3/4"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A175	00000
								3/4"	Above Head	0.385"	0.068"	60,000	Not Rated	100	93865A580	00000
								1"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A350	00000
								1 1/4"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A360	00000




										10-32

										3/8"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A370	0000


										1/2"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A190	0000
										1/2"	Above Head	0.385"	0.068"	60,000	Not Rated	100	93865A590	0000
										5/8"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A195	0000
										5/8"	Above Head	0.385"	0.068"	60,000	Not Rated	100	93865A610	00000
										3/4"	Below Head	0.448"	0.068"	60,000	Not Rated	100	93865A380	00000
										3/4"	Above Head	0.385"	0.068"	60,000	Not Rated	100	93865A620	00000
										1"	Below Head	0.448"	0.068"	Not Rated	Not Rated	50	93865A205	0000
										1"	Above Head	0.385"	0.068"	60,000	Not Rated	100	93865A630	00000




1/4"-20

3/8"	Below Head											0.575"	0.083"	Not Rated	Not Rated	50	93865A215	0000


3/8"	Above Head											0.51"	0.083"	60,000	Not Rated	50	93865A640	0000
1/2"	Below Head	0.575"										0.083"	Not Rated	Not Rated	50	93865A220	0000
1/2"	Above Head	0.51"	0.083"									60,000	Not Rated	50	93865A650	0000
5/8"	Below Head	0.575"	0.083"									Not Rated	Not Rated	50	93865A225	0000
5/8"	Above Head	0.51"	0.083"									60,000	Not Rated	50	93865A660	0000
3/4"	Below Head	0.575"	0.083"									Not Rated	Not Rated	50	93865A230	00000
3/4"	Above Head	0.51"	0.083"									60,000	Not Rated	50	93865A670	0000
7/8"	Below Head	0.575"	0.083"									60,000	Not Rated	25	93865A390	00000
1"	Below Head	0.575"	0.083"									Not Rated	Not Rated	50	93865A235	00000
1"	Above Head	0.51"	0.083"									60,000	Not Rated	50	93865A680	00000


1 1/4"	Below Head	0.575"	0.083"	60,000								Not Rated	25	93865A410	0000
1 1/2"	Below Head	0.575"	0.083"	60,000	Not Rated							25	93865A420	0000
1 3/4"	Below Head	0.575"	0.083"	60,000	Not Rated							25	93865A430	0000
2"	Below Head	0.575"	0.083"	60,000	Not Rated							25	93865A440	00000




		5/16"-18

		3/4"	Below Head	0.755"	0.099"							60,000	Not Rated	25	93865A450	00000


		3/4"	Above Head	0.63"	0.099"							60,000	Not Rated	5	93865A690	0000
		1"	Below Head	0.755"	0.099"	60,000						Not Rated	5	93865A460	0000
		1 1/4"	Below Head	0.755"	0.099"	60,000	Not Rated					25	93865A470	00000
		2"	Below Head	0.755"	0.099"	60,000	Not Rated					5	93865A480	00000




				3/8"-16

				1"	Below Head	0.88"	0.114"					60,000	Not Rated	10	93865A490	0000


				1 1/4"	Below Head	0.88"	0.114"					60,000	Not Rated	5	93865A510	0000
				1 1/2"	Below Head	0.88"	0.114"					60,000	Not Rated	10	93865A520	0000
				1 3/4"	Below Head	0.88"	0.114"					60,000	Not Rated	10	93865A530	0000




						1/2"-13

						1 1/4"	Below Head	1.005"	0.146"			60,000	Not Rated	5	93865A540	00000




								M3.5

								8 mm	Above Head			7 mm	1.1 mm	Not Rated	Not Rated	10	93865A710	0000


								25 mm	Above Head			7 mm	1.1 mm	Not Rated	Not Rated	10	93865A740	0000




										M4

										6 mm	Above Head	8 mm	1.2 mm	Not Rated	Not Rated	10	93865A750	0000


										8 mm	Above Head	8 mm	1.2 mm	Not Rated	Not Rated	10	93865A760	0000
										10 mm	Above Head	8 mm	1.2 mm	Not Rated	Not Rated	10	93865A770	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	90578A621	00000




						3/8" Diameter

						2 1/8"	3/4"	0.281"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	90578A631	0000


						3 1/8"	3/4"	0.281"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	90578A632	0000
						4 1/8"	3/4"	0.281"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	90578A633	00000
						6 1/8"	3/4"	0.281"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	90578A634	00000




								1/2" Diameter

								2 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	90578A641	00000


								3 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	90578A642	00000
								4 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	10	90578A643	00000
								5 5/16"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A644	0000
								6 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A645	0000
								8 1/8"	1"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A646	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	90578A651	00000


										5 3/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A652	00000
										6 3/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A653	00000
										6 9/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A654	00000
										8 3/16"	1 1/4"	0.312"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A655	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	90578A661	00000


												3 3/8"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A662	00000
												4 3/16"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A663	00000
												4 3/8"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A664	00000
												4 7/8"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A665	00000
												5 3/16"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A666	00000
												5 3/8"	1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A667	00000
5 7/8"												1 1/4"	0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A668	00000
6 3/16"	1 1/4"											0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	5	90578A669	00000
8 3/16"	1 1/4"											0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A671	0000
9 3/16"	1 1/4"											0.375"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A672	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	90578A681	00000


		5 3/16"	1 3/8"	0.375"								65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A682	0000
		6 3/16"	1 3/8"	0.375"	65,000							Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A683	0000
		7 3/16"	1 3/8"	0.375"	65,000							Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A684	0000
		8 3/16"	1 3/8"	0.375"	65,000							Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A685	0000
		9 3/16"	1 3/8"	0.375"	65,000							Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A686	0000




				1" Diameter

				4 1/4"	1 5/8"							0.5"	65,000	Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A691	0000


				6 1/4"	1 5/8"	0.5"	65,000					Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A692	0000
				8 1/4"	1 5/8"	0.5"	65,000					Not Rated	Not Rated	Ceramic	ASTM A108, AWS D1.1	1	90578A693	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	94445A110	000000




						8-32

						1/2"	5/8"	1/4"	1/16"	Not Rated	Not Rated	50	94445A200	00000




								10-24

								1/2"	11/16"	5/16"	1/16"	Not Rated	Not Rated	50	94445A300	00000




										10-32

										1/2"	11/16"	11/32"	1/16"	Not Rated	Not Rated	50	94445A400	00000




												1/4"-20

												1/2"	3/4"	3/8"	3/32"	Not Rated	Not Rated	25	94445A450	0000


												5/8"	3/4"	3/8"	3/32"	Not Rated	Not Rated	25	94445A500	0000
												3/4"	3/4"	3/8"	3/32"	Not Rated	Not Rated	25	94445A550	0000
												1"	3/4"	3/8"	3/32"	Not Rated	Not Rated	25	94445A600	0000


												18-8 Stainless Steel







																6-32

																3/8"	9/16"	7/32"	3/64"	Not Rated	Not Rated	25	96466A111	00000


																1/2"	9/16"	7/32"	3/64"	Not Rated	Not Rated	25	96466A010	00000




																		8-32

3/8"	5/8"																	1/4"	1/16"	Not Rated	Not Rated	25	96466A112	00000


1/2"	5/8"																	1/4"	1/16"	Not Rated	Not Rated	25	96466A025	00000
5/8"	5/8"	1/4"																1/16"	Not Rated	Not Rated	10	96466A113	0000
3/4"	5/8"	1/4"	1/16"															Not Rated	Not Rated	10	96466A114	0000
1"	5/8"	1/4"	1/16"															Not Rated	Not Rated	10	96466A116	0000
1 1/4"	5/8"	1/4"	1/16"															Not Rated	Not Rated	10	96466A117	0000
1 1/2"	5/8"	1/4"	1/16"															Not Rated	Not Rated	10	96466A118	0000




		10-24

		3/8"	11/16"	5/16"	1/16"													Not Rated	Not Rated	10	96466A119	0000


		1/2"	11/16"	5/16"	1/16"													Not Rated	Not Rated	10	96466A030	0000
		3/4"	11/16"	5/16"	1/16"	Not Rated												Not Rated	10	96466A123	0000
		1"	11/16"	5/16"	1/16"	Not Rated	Not Rated											10	96466A122	0000
		1 1/4"	11/16"	5/16"	1/16"	Not Rated	Not Rated											10	96466A124	0000




				10-32

				3/8"	11/16"	11/32"	1/16"	Not Rated	Not Rated									10	96466A125	0000


				1/2"	11/16"	11/32"	1/16"	Not Rated	Not Rated									10	96466A040	0000
				3/4"	11/16"	11/32"	1/16"	Not Rated	Not Rated									10	96466A126	0000
				1"	11/16"	11/32"	1/16"	Not Rated	Not Rated									10	96466A127	0000
				1 1/4"	11/16"	11/32"	1/16"	Not Rated	Not Rated	10								96466A128	00000
				1 3/4"	11/16"	11/32"	1/16"	Not Rated	Not Rated	10	96466A129							00000




						1/4"-20

						1/2"	3/4"	3/8"	3/32"	Not Rated	Not Rated							10	96466A045	00000


						5/8"	3/4"	3/8"	3/32"	Not Rated	Not Rated							10	96466A050	00000
						3/4"	3/4"	3/8"	3/32"	Not Rated	Not Rated							10	96466A055	00000
						7/8"	3/4"	3/8"	3/32"	Not Rated	Not Rated							10	96466A131	00000
						1"	3/4"	3/8"	3/32"	Not Rated	Not Rated	5						96466A060	0000
						1 1/4"	3/4"	3/8"	3/32"	Not Rated	Not Rated	5	96466A132					0000
						1 1/2"	3/4"	3/8"	3/32"	Not Rated	Not Rated	5	96466A133					0000
						1 3/4"	3/4"	3/8"	3/32"	Not Rated	Not Rated	5	96466A134					0000




								5/16"-18

								5/8"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	96466A135			0000


								3/4"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	96466A136			0000
								1"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	96466A137			0000
								1 1/4"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	96466A138			0000
								1 1/2"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	96466A139	00000
								2"	7/8"	7/16"	1/8"	Not Rated	Not Rated	5	96466A141	00000




										3/8"-16

										1"	1"	17/32"	5/32"	Not Rated	Not Rated	5	96466A142	00000


1 1/4"										1"	17/32"	5/32"	Not Rated	Not Rated	5	96466A143	00000
1 1/2"	1"									17/32"	5/32"	Not Rated	Not Rated	5	96466A144	00000