Welding Collets | McMaster-Carr

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Split

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89 Products

TIG Torch Collets


Split TIG Collet	Wedge TIG Collet

Hold your tungsten electrode in place during TIG welding with these collets. Slide them into a collet body or gas lens, and secure by screwing the back cap onto your torch.

Split TIG Collet—Split collets are split into two sides. When you tighten the back cap, the sides squeeze together to grip the tungsten. These are the most common collet style, but the split is a weak area where they deform over time.

Wedge TIG Collet—Wedge collets have a wedge-shaped head that presses against the collet body when the back cap is tightened, holding the tungsten steady. This single-piece design is more durable than split collets.

	For Nozzle Material	For Gas Coverage	Choose an Electrode Diameter (Industry Number)		Each
Split TIG Collet



	9, 20, 25	Ceramic Alumina, Silicon Nitride Ceramic, Quartz Glass	Narrow	0.020" (13N20), 0.040" (13N21)	77425A21	00000


	9, 20, 25	Ceramic Alumina, Silicon Nitride Ceramic, Quartz Glass	Narrow, Wide	0.063" (13N22), 0.094" (13N23), 0.125" (13N24)	77425A24	0000
	17, 18, 26	Ceramic Alumina, Silicon Nitride Ceramic, Quartz Glass	Narrow	0.040" (10N22), 0.063" (10N23), 0.094" (10N24), 0.125" (10N25), 0.156" (54N20)	77425A82	0000


	Wedge TIG Collet



			9, 20	Silicon Nitride Ceramic, Borosilicate Glass	Narrow	0.063", 0.094", 0.125"	77425A25	0000


			17, 18, 26	Silicon Nitride Ceramic, Borosilicate Glass	Narrow	0.063", 0.094", 0.125"	77425A26	0000
			17, 18, 26	Borosilicate Glass	Wide	0.063", 0.094", 0.125"	77425A27	0000

TIG Torch Accessory Kits

All the TIG torch accessories you need to get started in one kit, including collets, collet bodies, and nozzles.

Borosilicate Glass Nozzle—Kits with borosilicate glass nozzles are clear, so you'll be able to see what you're working on, even when space is cramped. However, these nozzles break more easily than other nozzles. Instead of threads, the collet bodies have O-rings; push the nozzle onto the collet body, and the O-ring holds it in place.

Ceramic Alumina Nozzle—Kits with ceramic alumina nozzles are durable and economical—a good choice for most applications, although they do limit visibility, unlike glass. The nozzles thread directly onto the collet bodies.

Gas-Saving TIG Welding—Gas-saving nozzles include a gas diffuser, so they use less gas than standard nozzles but won't compromise the quality of your weld. The gas diffuser smooths the flow of shielding gas, so it goes where you want it and isn't wasted. Shielding gas prevents oxidation and pitting, which weaken welds. Having reliable gas coverage means your electrode can stick out farther and reach into tight spots while staying inside the cloud of gas.

For Narrow Gas Coverage—Narrow nozzles work well with most metals.

For Wide Gas Coverage—Wide nozzles spray a large cloud of shielding gas that helps with tough-to-weld metals, such as titanium and Inconel. Because of their size, they’re harder to fit into corners than standard nozzles.

				For Narrow Gas Coverage		For Wide Gas Coverage
	For Torch Series No.	For Electrode Dia.	Includes		Each		Each
Borosilicate Glass Nozzle







				Gas-Saving TIG Welding

				9, 20	0.063"	Gas Lens Insulator 0.063" Collet 0.063" Collet Body 0.063" Gas Diffuser Borosilicate Glass Nozzle	7740A31	000000	7740A37	0000000


				9, 20	0.094"	Gas Lens Insulator 0.094" Collet 0.094" Collet Body 0.094" Gas Diffuser Borosilicate Glass Nozzle	7740A32	00000	7740A38	000000
				9, 20	0.125"	Gas Lens Insulator 0.125" Collet 0.125" Collet Body 0.125" Gas Diffuser Borosilicate Glass Nozzle	7740A33	00000	7740A39	000000
				17, 18, 26	0.063"	Gas Lens Insulator 0.063" Collet 0.063" Collet Body 0.063" Gas Diffuser Borosilicate Glass Nozzle	7740A34	00000	7740A41	000000
				17, 18, 26	0.094"	Gas Lens Insulator 0.094" Collet 0.094" Collet Body 0.094" Gas Diffuser Borosilicate Glass Nozzle	7740A35	00000	7740A42	000000
				17, 18, 26	0.125"	Gas Lens Insulator 0.125" Collet 0.125" Collet Body 0.125" Gas Diffuser Borosilicate Glass Nozzle	7740A36	00000	7740A43	000000


				Ceramic Alumina Nozzle







								Standard TIG Welding

								9	0.040", 0.063"	Long Back Cap 0.040" Collet 0.063" Collet 0.040" Collet Body 0.063" Collet Body Size 4 Aluminum Oxide Ceramic Nozzle Size 5 Aluminum Oxide Ceramic Nozzle Size 6 Aluminum Oxide Ceramic Nozzle 7" Long 2% Ceriated Tungsten Electrode with 0.040" Diameter 7" Long 2% Ceriated Tungsten Electrode with 0.063" Diameter	7740A23	00000	———	0


								17	0.040", 0.063", 0.094"	Short Back Cap 0.040" Collet 0.063" Collet 0.094" Collet 0.040" Collet Body 0.063" Collet Body 0.094" Collet Body Size 4 Aluminum Oxide Ceramic Nozzle Size 5 Aluminum Oxide Ceramic Nozzle Size 6 Aluminum Oxide Ceramic Nozzle 7" Long 2% Ceriated Tungsten Electrode with 0.040" Diameter 7" Long 2% Ceriated Tungsten Electrode with 0.063" Diameter 7" Long 2% Ceriated Tungsten Electrode with 0.094" Diameter	7740A24	00000	———	0
								18, 26	0.063", 0.094", 0.125"	Short Back Cap 0.063" Collet 0.094" Collet 0.125" Collet 0.063" Collet Body 0.094" Collet Body 0.125" Collet Body Size 5 Aluminum Oxide Ceramic Nozzle Size 6 Aluminum Oxide Ceramic Nozzle Size 8 Aluminum Oxide Ceramic Nozzle 7" Long 2% Ceriated Tungsten Electrode with 0.063" Diameter 7" Long 2% Ceriated Tungsten Electrode with 0.094" Diameter 7" Long 2% Ceriated Tungsten Electrode with 0.125" Diameter	7740A25	00000	———	0
								20	0.063", 0.094", 0.125"	Long Back Cap 0.063" Collet 0.094" Collet 0.125" Collet 0.063" Collet Body 0.094" Collet Body 0.125" Collet Body Size 5 Aluminum Oxide Ceramic Nozzle Size 6 Aluminum Oxide Ceramic Nozzle Size 7 Aluminum Oxide Ceramic Nozzle 7" Long 2% Ceriated Tungsten Electrode with 0.063" Diameter 7" Long 2% Ceriated Tungsten Electrode with 0.094" Diameter 7" Long 2% Ceriated Tungsten Electrode with 0.125" Diameter	7740A26	00000	———	0




										Gas-Saving TIG Welding

										9, 20	0.063"	Aluminum Oxide Ceramic Nozzle Gas Lens Insulator 0.063" Collet 0.063" Collet Body 0.063" Gas Diffuser	7740A11	00000	7740A17	000000


										9, 20	0.094"	Aluminum Oxide Ceramic Nozzle Gas Lens Insulator 0.094" Collet 0.094" Collet Body 0.094" Gas Diffuser	7740A12	00000	7740A18	000000
										9, 20	0.125"	Aluminum Oxide Ceramic Nozzle Gas Lens Insulator 0.125" Collet 0.125" Collet Body 0.125" Gas Diffuser	7740A13	00000	7740A19	000000
										17, 18, 26	0.063"	Aluminum Oxide Ceramic Nozzle Gas Lens Insulator 0.063" Collet 0.063" Collet Body 0.063" Gas Diffuser	7740A14	00000	7740A21	000000
										17, 18, 26	0.094"	Aluminum Oxide Ceramic Nozzle Gas Lens Insulator 0.094" Collet 0.094" Collet Body 0.094" Gas Diffuser	7740A15	00000	7740A22	000000
										17, 18, 26	0.125"	Aluminum Oxide Ceramic Nozzle Gas Lens Insulator 0.125" Collet 0.125" Collet Body 0.125" Gas Diffuser	7740A16	00000	7740A27	000000

Stud Welders

Join threaded studs and pins to metal surfaces in milliseconds, forming bonds stronger than the studs themselves. Just load a stud into the gun, aim it against your base material, and pull the trigger to fuse the two together.

Unlike drawn arc stud welders, our capacitor discharge systems work with metals less than a millimeter thick. They won’t leave fastener heads on the opposite side of the base material, so they’re often used for jobs requiring a clean-looking finish, such as attaching handles to high-end cookware. The one-sided welds are also preferred by the USDA for fabricating dairy tanks and other food-safe machinery – with no holes drilled, germs have nowhere to hide.

Welders

Easily portable at less than 25 lbs.
Plugs into standard outlets
Full-color LCD display visualizes power output and includes material presets
A collet is required; choose one below that matches the size or gauge of your studs or pins

		Input				Overall
	Stud Weld Rate	Voltage, V AC	Freq., Hz	Current, amp	Output Voltage Range, V DC	Ht.	Wd.	Dp.	Cord Lg., ft.	Includes		Each
Three Blade



		4 per min. @ 200V DC	120	60	10	70 to 200	13"	12"	9"	6	Control Unit Welding Gun with 21-ft. Cable 4 Stop Pins for Setting Threaded Studs and Pins in Collet 15-ft. Ground Cable with 2 Ground Clamps	7845A38	000000000

Collets

Hold pins in place during welding
Must match the size or gauge of the stud or pin
Studs from other systems won’t fit; choose matching studs below

For Pin Ga.		Each



—	12	7845A951	000000


4-40	—	7845A351	00000
6-32	10	7845A352	00000
8-32	—	7845A353	00000
10-24	—	7845A354	00000
1/4"-20	—	7845A355	00000

Threaded Studs

Suitable for steel and stainless steel base materials, as well as aluminum and brass

Copper-Plated Steel—Copper-plated steel studs have good corrosion resistance.

18-8 Stainless Steel—18-8 stainless steel studs are more corrosion resistant than copper-plated steel studs.

Aluminum—Aluminum studs are more lightweight than steel or stainless steel studs. They’re nonmagnetic. In wet environments, they resist corrosion.

				Copper-Plated Steel			18-8 Stainless Steel			Aluminum
Thread Size	For Collet Thread Size	Head Dia.	Lg.	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.



	4-40	4-40	3/16"	1/2"	100	7845A55	000000	—	———	0	—	———	0


	6-32	6-32	7/32"	3/8"	100	7845A132	00000	100	7845A141	000000	—	———	0
	6-32	6-32	7/32"	1/2"	100	7845A51	0000	100	7845A88	00000	—	———	0
	6-32	6-32	7/32"	3/4"	100	7845A72	00000	100	7845A82	00000	—	———	0
	6-32	6-32	7/32"	1 1/2"	100	7845A77	00000	100	7845A83	00000	—	———	0
	8-32	8-32	1/4"	3/8"	100	7845A133	00000	—	———	0	—	———	0
	8-32	8-32	1/4"	1/2"	100	7845A52	0000	100	7845A89	00000	—	———	0
	8-32	8-32	1/4"	5/8"	100	7845A134	00000	—	———	0	—	———	0
	8-32	8-32	1/4"	3/4"	100	7845A78	00000	100	7845A84	00000	—	———	0
	10-24	10-24	1/4"	1/2"	100	7845A56	00000	100	7845A91	00000	—	———	0
	10-24	10-24	1/4"	3/4"	—	———	0	—	———	0	100	7845A144	000000


	10-24	10-24	1/4"	1"	100	7845A57	00000	100	7845A92	00000	—	———	0
	10-32	10-32	1/4"	3/8"	—	———	0	100	7845A137	00000	—	———	0
	10-32	10-32	1/4"	1/2"	—	———	0	100	7845A138	00000	—	———	0
	10-32	10-32	1/4"	3/4"	—	———	0	100	7845A139	00000	—	———	0
	1/4"-20	1/4"-20	5/16"	1/2"	100	7845A53	00000	100	7845A85	00000	100	7845A142	00000
	1/4"-20	1/4"-20	5/16"	5/8"	—	———	0	100	7845A135	00000	—	———	0
	1/4"-20	1/4"-20	5/16"	3/4"	100	7845A131	00000	100	7845A86	00000	—	———	0
	1/4"-20	1/4"-20	5/16"	1"	100	7845A58	00000	100	7845A87	00000	100	7845A143	00000
	1/4"-20	1/4"-20	5/16"	1 1/2"	—	———	0	100	7845A136	000000	—	———	0

Pins

Often used for installing insulation and acoustical lining

			Copper-Plated Steel
For Collet Ga. No.	For Collet Thread Size	Lg.	Pkg. Qty.		Pkg.



	10	6-32	2 1/2"	100	7845A111	000000


	10	6-32	3"	100	7845A45	00000
	10	6-32	6"	100	7845A46	00000
	12	—	1"	100	7845A112	00000
	12	—	2"	100	7845A113	00000
	12	—	2 1/2"	100	7845A33	00000
	12	—	6"	100	7845A114	00000

TIG Torch Collet Bodies

Attach TIG torch nozzles to TIG torches with these collet bodies. Holes in the collet body route shielding gas to the nozzle to protect your weld from oxidation and pitting. Use them with a split or wedge collet to hold a tungsten electrode. All collet bodies require a TIG torch insulator.

For Borosilicate Glass Nozzles

Collet bodies for borosilicate glass nozzles have a silicone O-ring. Press the nozzle onto the collet body, and the O-ring holds it in place.

		For Narrow Gas Coverage		For Wide Gas Coverage
For Torch Series No.	For Electrode Dia.		Each		Each
9, 20	0.063", 0.094", 0.125"	77425A436	00000	77425A438	000000
17, 18, 26	0.063", 0.094", 0.125"	77425A437	0000	77425A439	00000

For Ceramic Alumina and Silicon Nitride Ceramic Nozzles

Collet bodies for ceramic alumina and silicon nitride ceramic nozzles have threads for connecting to nozzles. Use an adapter ring (sold separately) to connect quartz glass nozzles to these collet bodies.

TIG Torch Collet Bodies				TIG Torch Adapter Rings for Quartz Glass Nozzles
		For Narrow Gas Coverage
For Torch Series No.	Choose an Electrode Diameter (Industry Number)		Each	Nozzle Connection		Each
9, 20, 25	0.020" (13N25), 0.040" (13N26), 0.063" (13N27), 0.094" (13N28), 0.125" (13N29)	77425A85	00000	Threaded × Push On	90567A120	00000
17, 18, 26	0.040" (10N30), 0.063" (10N31), 0.094" (10N32), 0.125" (10N28), 0.156" (406488)	77425A86	0000	Threaded × Push On	90567A110	0000