Bulkheads for Ammonium Hydroxide

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Fitting Connection

Flanged

Quick Clamp

Yor-Lok

High-Vacuum Flange Size

For Use With

Acetic Acid (White Vinegar) (10% Concentration)

Hydrochloric Acid (25% Concentration)

Nitric Acid (10% Concentration)

Phosphoric Acid (70% Concentration)

Phosphoric Acid (85% Concentration)

Silane

Sodium Carbonate (Soda Ash)

Sodium Hydroxide (Caustic Soda) (50% Concentration)

Sodium Hypochlorite (Bleach)

Steam

Sulfur Hexafluoride

Sulfuric Acid

Sulfuric Acid (75% Concentration)

Tungsten Hexafluoride

Water

Xenon

Material

304 Stainless Steel

304/304L Stainless Steel

316 Stainless Steel

316/316L Stainless Steel

System of Measurement

Inch

Tube OD

1/4"

Tube Material

304/304L Stainless Steel

316/316L Stainless Steel

Flange OD

Fitting Type

Mounting Location

High-Vacuum Connection Type

ISO-KF

Connects To

Tube

Shape

Straight

Maximum Pressure @ Temperature

Compatible With

Maximum Vacuum @ Temperature

1× 10^-13 Torr @ 72° F

1× 10^-8 Torr @ 72° F

Fabrication

Seamless

Welded

Maximum Environment Temperature

300° F

840° F

DFARS Specialty Metals

Exempt

1/4"

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

Yes

Export Control Classification Number (ECCN)

REACH

RoHS

Maximum Temperature

Minimum Temperature

18 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Quick-Clamp Through-Wall Fittings for High-Vacuum Chambers

Quick-Clamp Shown Installed

For Use With: See table
Environment Temperature Range: 32° to 300° F
Process Temperature Range: -325° to 995° F
Tubing: Use with 304/304L or 316/316L stainless steel
Specifications Met: ISO 2861

Transfer liquids and gases into high-vacuum chambers with these assembled fittings, also known as feedthroughs. Their quick-clamp (ISO-KF) connections are easier to install and remove than bolt-on flanges. This makes them a good choice for systems that need frequent cleaning, repairs, and setup changes, such as those in teaching and research labs. These fittings meet ISO 2861, which means they’re made to strict dimensional standards that ensure vacuum-tight connections. Made of stainless steel and aluminum, these fittings resist rusting. They are not for use in pressure applications.

These fittings are ready to install and include quick-clamp fittings, metal tubing, and Yor-Lok tube fittings at each end. The Yor-Lok fittings include a nut and two sleeves that grip your system’s stainless steel tubing. To complete the quick-clamp connection, you’ll need a clamp and ring (each sold separately).

Fittings

				For Tube
Flange OD	High-Vacuum Flange Size	High Vacuum Connection Type	Connection Style	OD	Wall Thick.	Lg.	Max. Vacuum	Material		Each
For Use With Acetone, Air, Ammonium Hydroxide, Helium, Methane, Nitrogen, Oil, Water
1.18"	16	ISO-KF	Yor-Lok	1/4"	0.028"-0.095"	8"	10 ^-8 torr @ 72° F	304 Stainless Steel	3441N31	0000000
1.57"	25	ISO-KF	Yor-Lok	1/4"	0.028"-0.095"	8"	10 ^-8 torr @ 72° F	304 Stainless Steel	3441N32	000000
2.16"	40	ISO-KF	Yor-Lok	1/4"	0.028"-0.095"	8"	10 ^-8 torr @ 72° F	304 Stainless Steel	3441N33	000000
2.95"	50	ISO-KF	Yor-Lok	1/4"	0.028"-0.095"	8"	10 ^-8 torr @ 72° F	304 Stainless Steel	3441N34	000000

Clamps

With Wing Nut
For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	Material	Max. Vacuum		Each
1.18"	10, 16	ISO-KF	Aluminum	10 ^-8 torr @ 72° F	4518K711	00000
1.57"	25	ISO-KF	Aluminum	10 ^-8 torr @ 72° F	4518K72	00000
2.16"	40	ISO-KF	Aluminum	10 ^-8 torr @ 72° F	4518K73	00000
2.95"	50	ISO-KF	Aluminum	10 ^-8 torr @ 72° F	4518K74	00000

Rings

			Material
For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	O-Ring	Inner Ring	Max. Vacuum		Each
1.18"	16	ISO-KF	Viton® Fluoroelastomer Rubber	304 Stainless Steel	10 ^-8 torr @ 72° F	4518K621	00000
1.57"	25	ISO-KF	Viton® Fluoroelastomer Rubber	304 Stainless Steel	10 ^-8 torr @ 72° F	4518K63	00000
2.16"	40	ISO-KF	Viton® Fluoroelastomer Rubber	304 Stainless Steel	10 ^-8 torr @ 72° F	4518K64	00000
2.95"	50	ISO-KF	Viton® Fluoroelastomer Rubber	304 Stainless Steel	10 ^-8 torr @ 72° F	4518K65	00000

Flanged Through-Wall Fittings for Ultra-High-Vacuum Chambers

Shown Installed

For Use With: See table
Environment Temperature Range: 32° to 300° F
Process Temperature Range: -325° to 995° F
Tubing: Use with 304/304L or 316/316L stainless steel

Bolt these fittings onto your ultra-high-vacuum chamber to transfer liquids and gases inside. Also known as feedthroughs, they come assembled with a flanged (CF) fitting, metal tubing, and two Yor-Lok tube fittings. Their bolt-together connection forms the tightest seal of any fitting type, so you can use them in semiconductor manufacturing, surface analysis experiments, and even research with particle accelerators. Made of stainless steel and copper, these fittings resist rusting. These fittings are not for use in pressure applications.

To complete the flanged connection, you’ll need a gasket and bolt kit (each sold separately). The Yor-Lok fittings on each end include a nut and two sleeves that grip your system’s stainless steel tubing.

Fittings

				Bolt Holes			For Tube
Flange OD	High-Vacuum Flange Size	High Vacuum Connection Type	Bolt Circle Dia.	Dia.	No. of	Connection Style	OD	Wall Thick.	Lg.	Max. Vacuum	Material		Each
For Use With Acetone, Air, Ammonium Hydroxide, Helium, Methane, Nitrogen, Oil, Water
1 21/64"	16	CF	1 1/16"	11/64"	6	Yor-Lok	1/4"	0.028"-0.095"	8"	10 ^-13 torr @ 72° F	304 Stainless Steel	3441N41	0000000
2 3/4"	40	CF	2 5/16"	17/64"	6	Yor-Lok	1/4"	0.028"-0.095"	8"	10 ^-13 torr @ 72° F	304 Stainless Steel	3441N42	000000

Gaskets

For Flange OD	Gasket Material	Specifications Met		Each
1 21/64"	Copper	ASTM F68	9088K51	00000
2 3/4"	Copper	ASTM F68	9088K52	0000

Bolt Kits

For Flange OD	For High-Vacuum Flange Size	Bolt Dia.	Thread Size	No. of Bolts Included	No. of Nuts Included	No. of Washers Included	Bolt Material		Each
1 21/64"	16	0.164"	8-32	6	6	12	18-8 Stainless Steel	9088K71	00000
2 3/4"	40	1/4"	1/4"-28	6	6	12	18-8 Stainless Steel	9088K72	00000