- A: 1.50 in / 38.1 mm
- B: 0.98 in / 25 mm
- C: 1.26 in / 32 mm
The flanges, or the vacuum flange fittings, are available in the following sizes KF10, KF-16, KF-25, KF-40, KF-50 with corresponding flange sizes NW-10, NW-16, NW-25, NW-40, NW-50.
The KF-40 to ¼ NPT female pipe thread adapters are made out of stainless steel and are used to connect the ISO-KF flange with the male pipe. The KF 40 to ¼ inch NPT-Female Adapter assemblies consist of two flanges, a centering ring, and an aluminum clamp. A uniform application of pressure on the clamp insures a vacuum seal. The mating flange surfaces compress the o-ring, which is held in place by a metal centering ring, to generate vacuum seal.
Please refer to Recommended Products Section at the bottom of this page to choose corresponding clamps and rings for your KF The KF-40 to ¼ NPT Female Pipe Thread Adapter.
The KF to NPT Female Pipe Adapters are available in the following sizes:
NW 16 x 1/8 NPT
NW 16 x 1/4 NPT
NW 25 x 1/8 NPT
NW 25 x 1/4 NPT
NW 40 x 1/8 NPT
NW 40 x 1/4 NPT
NW 50 x 1/8 NPT
NW 50 x 1/4 NPT




Adapter KF 25 (NW 25) to 1/8 NPT-Female, Flange ISO-KF, NW-25, Stainless Steel Hardware
Wholesale KF-25 Vacuum Bellows Hose, 8 Inch, Flexible Coupling, ISO-KF Flange Size NW-25, Stainless Steel
Wholesale KF-50 Vacuum Bellows Hose, 120 Inch, ISO-KF Flange Size NW-50, Stainless Steel 
