Quick Connect Flanges | McMaster-Carr

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System of Measurement

Tube OD

Tube Material

Fitting Type

High-Vacuum Flange Size

Material

Connects To

Shape

For Use With

Maximum Vacuum @ Temperature

1× 10^-8 Torr @ 72° F

Flange OD

Fabrication

Length

Maximum Temperature

O-Ring Material

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

Yes

Minimum Temperature

-49° F to -1° F

Relative Vacuum Rating

For Tube Fabrication

Sterilize With

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

26 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-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.

Connectors have quick-connect fittings on both sides. Use them to connect two lengths of tubing: stainless steel to stainless steel, glass to glass, or go from one material to the other.

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 Connectors, Quick Connect

Connectors								Replacement O-Rings
For Tube OD	Wall Thick.	Max. Vacuum	Material	O-Ring Material	Temp. Range, °F		Each		Each
1/4"	0.117"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	3486N11	0000000	3486N21	00000
1/2"	0.078"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	3486N12	000000	3486N22	0000
3/4"	0.212"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	3486N13	000000	3486N23	0000
1"	0.18"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	3486N14	000000	3486N24	0000
1 1/2"	0.242"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	3486N15	000000	3486N25	0000
2"	0.242"	10 ^-8 torr @ 72° F	304 Stainless Steel	Buna-N Rubber	-40° to 250°	3486N16	000000	3486N26	0000

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