Buna-N Tri-Clamp Tube Gaskets

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Maximum Vacuum @ Temperature

29 in. Hg @ 72° F

1× 10^-8 Torr @ 72° F

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34 Products

About Hose

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Quick-Connect High-Vacuum Fittings for Stainless Steel Tubing

Twist these fittings onto high-vacuum tubing to quickly make sealed, high-vacuum connections without the need for clamping, welding, or tools. To connect, insert your tubing into the fitting and twist the collar on the end of the fitting; an O-ring on the inside of the fitting compresses to form the seal. Also known as quick-disconnects, they're as easy to twist off as they are to twist on. Not for use in pressure applications.

Adapters have a quick-connect fitting on one side and a quick-clamp fitting on the other. Use them to attach and remove components for one-off uses or to adapt your quick-clamp system to connect to glass tubing. Quick-clamp fittings are also known as KF, QF, and NW fittings; they require a clamp and ring (sold separately) to complete the connection.

Straight Adapters, Quick Connect × Quick Clamp

Adapters
	Quick Clamp Tube Connection												Replacement O-Rings
For Tube OD (Quick Connect)	For Tube OD	Flange OD	High-Vacuum Flange Size	High Vacuum Connection Type	Wall Thick.	Max. Vacuum	Material	O-Ring Material	Temp. Range, °F	Specifications Met		Each		Each
1/4"	3/4"	1.18"	16	ISO-KF	0.112"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	ISO 2861	3486N31	0000000	3486N21	00000
1/2"	1"	1.575"	25	ISO-KF	0.117"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	ISO 2861	3486N32	000000	3486N22	0000
3/4"	1"	1.575"	25	ISO-KF	0.055"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	ISO 2861	3486N33	000000	3486N23	0000
1"	1"	1.575"	25	ISO-KF	0.055"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	ISO 2861	3486N34	000000	3486N24	0000
1 1/2"	1 1/2"	2.165"	40	ISO-KF	0.118"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	ISO 2861	3486N35	000000	3486N25	0000
2"	2"	2.953"	50	ISO-KF	0.118"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	ISO 2861	3486N36	000000	3486N26	0000

Clamps

with Wing Nut
For Tube OD	For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	Material	Nut Material	Max. Vacuum	Temp. Range, °F	Specifications Met		Each
1/2"; 3/4"	1.18"	10; 16	ISO-KF	Aluminum	Zinc Alloy	10 ^-8 torr @ 72° F	0° to 300°	ISO 2861	4518K711	00000
1"	1.57"	25	ISO-KF	Aluminum	Zinc Alloy	10 ^-8 torr @ 72° F	0° to 300°	ISO 2861	4518K72	00000
1 1/2"	2.16"	40	ISO-KF	Aluminum	Zinc Alloy	10 ^-8 torr @ 72° F	0° to 300°	ISO 2861	4518K73	00000
2"	2.95"	50	ISO-KF	Aluminum	Zinc Alloy	10 ^-8 torr @ 72° F	0° to 300°	ISO 2861	4518K74	00000

Rings

				Material
For Tube OD	For Flange OD	For High-Vacuum Flange Size	High Vacuum Connection Type	O-Ring	Inner Ring	Max. Vacuum	Temp. Range, °F	Specifications Met		Each
3/4"	1.18"	16	ISO-KF	Viton® Fluoroelastomer Rubber	304 Stainless Steel	10 ^-8 torr @ 72° F	0° to 300°	ISO 2861	4518K621	00000
1"	1.57"	25	ISO-KF	Viton® Fluoroelastomer Rubber	304 Stainless Steel	10 ^-8 torr @ 72° F	0° to 300°	ISO 2861	4518K63	00000
1 1/2"	2.16"	40	ISO-KF	Viton® Fluoroelastomer Rubber	304 Stainless Steel	10 ^-8 torr @ 72° F	0° to 300°	ISO 2861	4518K64	00000
2"	2.95"	50	ISO-KF	Viton® Fluoroelastomer Rubber	304 Stainless Steel	10 ^-8 torr @ 72° F	0° to 300°	ISO 2861	4518K65	00000

Oil-Resistant Wet-Food and Beverage Hose with Quick-Clamp Sanitary Fittings

Temperature Range: -25° to 230° F
Maximum Vacuum: 29" of Hg @ 72° F
Material: Buna-N Rubber Blend with Blended Rubber Cover
Color: White

For easy access to lines that handle oily and fatty foods and beverages, this hose has flanged ends that join with quick-clamp fittings. Both the hose and fittings are 3-A certified for safe use with food, and the hose is also FDA compliant. Made of a Buna-N blend, this hose remains flexible even when exposed to oil. A smooth interior prevents food from getting caught and building up. The hose and fittings withstand high temperatures and mild cleaning solutions, so you can clean your line often. Reinforced with yarn and steel wire, this hose holds its shape and won't collapse when hooked up to a vacuum pump.

The fittings are also known as tri-clamp fittings. They attach to other quick-clamp fittings with a gasket and a clamp.

304 Stainless Steel Quick-Clamp Sanitary × 304 Stainless Steel Quick-Clamp Sanitary
Flange OD	ID	OD	Bend Radius	Max. Pressure	Specifications Met		5 ft.	10 ft.	15 ft.	20 ft.
0.984" × 0.984"	3/4"	1 1/4"	2"	150 psi @ 72° F	3-A Certified 18-03, 3-A Certified 62-02, FDA Compliant 21 CFR 177.2600	5567K16	0000000	0000000	0000000	000000000
1.984" × 1.984"	1"	1 7/16"	3"	150 psi @ 72° F	3-A Certified 18-03, 3-A Certified 62-02, FDA Compliant 21 CFR 177.2600	5567K14	000000	000000	00000000	00000000
1.984" × 1.984"	1 1/4"	1 3/4"	4"	150 psi @ 72° F	3-A Certified 18-03, 3-A Certified 62-02, FDA Compliant 21 CFR 177.2600	5567K17	000000	000000	00000000	00000000
1.984" × 1.984"	1 1/2"	2"	4"	150 psi @ 72° F	3-A Certified 18-03, 3-A Certified 62-02, FDA Compliant 21 CFR 177.2600	5567K18	000000	000000	00000000	00000000
2.516" × 2.516"	2"	2 9/16"	5"	150 psi @ 72° F	3-A Certified 18-03, 3-A Certified 62-02, FDA Compliant 21 CFR 177.2600	5567K23	00000000	00000000	00000000	00000000
3.579" × 3.579"	3"	3 5/8"	7"	150 psi @ 72° F	3-A Certified 18-03, 3-A Certified 62-02, FDA Compliant 21 CFR 177.2600	5567K24	00000000	00000000	00000000	00000000
4.682" × 4.682"	4"	4 11/16"	10"	150 psi @ 72° F	3-A Certified 18-03, 3-A Certified 62-02, FDA Compliant 21 CFR 177.2600	5567K25	00000000	00000000	00000000	00000000

Oil-Resistant Wet-Food and Beverage Hose

Temperature Range: -25° to 230° F
Maximum Vacuum: 29" of Hg @ 72° F
Material: Buna-N Rubber Blend
Color: White
Compatible Hose Fittings: Quick-Clamp Sanitary

Blended with Buna-N, this hose remains flexible and won’t break down from oily or fatty food and beverages. It also withstands high temperatures and chemicals, so you can clean it often. The interior is smooth to prevent product buildup inside the hose. This hose is FDA compliant and 3-A certified, so you know it’s safe for use with food. Reinforced with yarn and steel wire, it holds its shape and won’t collapse when hooked up to a vacuum pump.

							Per Ft.
ID	OD	Bend Radius	Max. Pressure	Specifications Met	Max. Continuous Lg., ft.		1-99	100-Up
3/4"	1 3/16"	2"	150 psi @ 72° F	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	100	5567K15	000000	000000
1"	1 7/16"	3"	150 psi @ 72° F	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	100	5567K26	00000	00000
1 1/4"	1 11/16"	4"	150 psi @ 72° F	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	100	5567K19	00000	00000
1 1/2"	1 15/16"	4"	150 psi @ 72° F	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	100	5567K21	00000	00000
2"	2 7/16"	5"	150 psi @ 72° F	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	100	5567K22	00000	00000
3"	3 9/16"	7"	150 psi @ 72° F	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	100	5567K33	00000	00000
4"	4 9/16"	10"	150 psi @ 72° F	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	100	5567K44	000000	00000