Yor-Lok Air Hose | McMaster-Carr

Clear All

	Connection Style Connection Style	Show

Yor-Lok

	Connection Style Connection Style	Hide

	Type Type

	Adapter

	System of Measurement System of Measurement

Inch

	For Tube OD For Tube OD

	Trade Number Trade Number

	Shape Shape

	Straight

	High Vacuum Connection Type High Vacuum Connection Type

ISO-KF

	For Tube Material For Tube Material

304/304L Stainless Steel

316/316L Stainless Steel

	Connection Type Connection Type

	Tube

	Material Material

Stainless Steel

	Compatible With Compatible With

Let-Lok

Parker A-Lok

Swagelok®

	Flange OD Flange OD

1.18"

1.57"

2.16"

	Maximum Vacuum Maximum Vacuum

1 × 10^-9 torr @
72° F

	Maximum Temperature Maximum Temperature

250° to 499° F

	Minimum Temperature Minimum Temperature

-99° to 0° F

	Gender Gender

	Female

	Length Length

1 15/32"

1 5/8"

	Vacuum Rating Vacuum Rating

High

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Specifications Met Specifications Met

ISO

	Nut Material Nut Material

Stainless Steel

	Sterilize With Sterilize With

Steam (Autoclaving)

	Maximum Pressure Maximum Pressure

5 psi @ 72° F

View catalog pages (2)

Forward

How can we improve?

38 Products

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.

For Use With:
Fittings with Gasket End: Air, Argon, Helium, Nitrogen
All Other Fittings: Air
Temperature Range: 0° to 300° F
Tubing: Use with 304/304L or 316/316L stainless steel
Specifications Met: ISO 2861

Instead of a gasket, these fittings have a special ring that is designed for high-vacuum applications, such as vacuum coating and heat treating, leak testing, and analyzing gases. Also known as KF, QF, and NW fittings, they are the most common type of connection in high-vacuum systems. Connect with a clamp and another quick-clamp fitting for fast, easy access to your line. To use fittings in pressure applications, use a pressure-rated ring (sold separately).

304 stainless steel fittings have very good corrosion resistance.

Note: To complete a connection, you’ll need two quick-clamp fittings, a ring, and a clamp (all sold separately).

Straight Adapters, Tube × Yor-Lok Tube

Fittings with Yor-Lok end connect plain-end stainless steel tubing using a nut with two sleeves that bite into the tubing to create a strong seal. Yor-Lok connections are manufactured to tight tolerances—use them for high-pressure applications such as supplying gas or liquid to a high-vacuum chamber. Also known as instrumentation fittings.

Quick-Clamp Tube Connection
For Tube OD	Flange OD	Trade Number	High Vacuum Connection Type	For Tube OD (Yor-Lok)	Max. Vacuum	Max. Pressure	Compatible With		Each
3/4"	1.18"	16	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	000000
3/4"	1.18"	16	ISO-KF	3/8"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	00000
3/4"	1.18"	16	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	000000
1"	1.57"	25	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	00000
1"	1.57"	25	ISO-KF	3/8"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	00000
1"	1.57"	25	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	000000
1 1/2"	2.16"	40	ISO-KF	1/4"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	00000
1 1/2"	2.16"	40	ISO-KF	3/8"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	000000
1 1/2"	2.16"	40	ISO-KF	1/2"	1 × 10 ^-9 torr @ 72° F	5 psi @ 72° F	Let-Lok, Parker A-Lok, Swagelok®	00000000	000000

Clamps

Clamp with Wing Nut

Spring-Loaded Clamp

Clamps (sold separately) tighten by hand. Spring-loaded clamps are also known as toggle clamps.

with Wing Nut
For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	Material	Max. Vacuum	Lanyard Length		Each
1/2"	1.18"	10	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	00000000	00000
1/2", 3/4"	1.18"	10, 16	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	00000000	0000
3/4"	1.18"	16	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	00000000	0000
1"	1.57"	25	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
1 1/2"	2.16"	40	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
Spring Loaded
1/2"	1.18"	10	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
1/2", 3/4"	1.18"	10, 16	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
3/4"	1.18"	16	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
1"	1.57"	25	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
1 1/2"	2.16"	40	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	__	0000000	00000
Spring Loaded with Lanyard
3/4"	1.18"	16	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	5 3/4"	00000000	00000
1"	1.57"	25	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	5 3/4"	00000000	00000
1 1/2"	2.16"	40	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	5 3/4"	00000000	00000

Rings

Ring

Ring with Stainless Steel Screen

Ring with Aluminum Outer Ring

Rings (sold separately) consist of a stainless steel inner ring covered by a fluoroelastomer O-ring. Rings with screen have a stainless steel screen to filter out large particles. Pressure-rated rings have an aluminum outer ring to withstand extra pressure.

Rings
For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	Inner Ring Material	Max. Vacuum	Max. Pressure		Each
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	0000000	0000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	0000000	00000
Rings with Stainless Steel Screen
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	Not Rated	00000000	00000
Rings with Aluminum Outer Ring
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	100 psi @ 72° F	0000000	00000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	75 psi @ 72° F	0000000	00000

Hose

Rigid Hose

Flexible Hose

Hose (sold separately) absorbs moderate vibration

3 3/16" Lg.
For Tube OD	Flange OD	Trade Number	High Vacuum Connection Type	Material	Max. Vacuum	Bend Radius	Flexibility		Each
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	__	Rigid	0000000	000000
4 3/16" Lg.
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	__	Rigid	0000000	00000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	__	Rigid	0000000	000000
12" Lg.
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 5/8"	Flexible	00000000	000000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 3/8"	Flexible	00000000	000000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	2 1/2"	Flexible	00000000	000000
24" Lg.
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 5/8"	Flexible	00000000	000000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 3/8"	Flexible	00000000	000000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	2 1/2"	Flexible	00000000	000000
39" Lg.
3/4"	1.18"	16	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 5/8"	Flexible	00000000	000000
1"	1.57"	25	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	1 3/8"	Flexible	00000000	000000
1 1/2"	2.16"	40	ISO-KF	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	2 1/2"	Flexible	00000000	000000

How to Identify and Measure Fittings

Quick-Clamp High-Vacuum Fittings for Stainless Steel Tubing