
- A: 1.57 in / 40 mm
- B: 1.38 in / 35 mm
- C: 0.28 in / 7.1 mm
- D: 0.55 in / 14 mm
Quick flange fitting sizes are 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-25 (QF) to 1/4 inch NPT Male Pipe Adapter connects the ISO-KF Flange and the 1/4 in Male Pipe, and is made of stainless steel. The assembly of KF-25 (QF) to 1/4 NPT-Male Adapter consists of a clamp and an o-ring. 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-25 (QF) to 1/4 NPT Male Pipe Adapter.
The KF (QF) to NPT Male 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 25 x 1/2 NPT
NW 25 x 3/4 NPT
NW 40 x 1/8 NPT
NW 40 x 1/4 NPT
NW 40 x 1/2 NPT
NW 40 x 3/4 NPT
NW 50 x 1/8 NPT
NW 50 x 1/4 NPT
NW 50 x 1/2 NPT
NW 50 x 3/4 NPT




Wholesale KF-40 Vacuum Bellows Hose, 100 Inch, ISO-KF Flange Size NW-40, Stainless Steel
Leybold Scrollvac-18 Plus Oil Free Dry Scroll Vacuum Pump with Gas Ballast, 1-phase 100-240 VAC. PN: 141018V10
Leybold D25 D25B Trivac Rotary Vane Dual Stage Mechanical Vacuum Pump, 1-Ph., 115 VAC. PN: 91275V001
New Pfeiffer HiPace-300C (chemical) Turbo Drag Pump DN100 ISO-KF ISO 100, 245 l/s P/N PMP03906
New Pfeiffer HiPace-300 Turbo Drag Pump DN100 CF-F 6 inch Conflat 260 l/s P/N PMP03901
Leybold D25, D25B, ATEX 3i Trivac Rotary Vane Dual Stage Mechanical Vacuum Pump, 1-Ph. 230VAC. PN: 11335
Fluorocarbon Gaskets for DN35CF, 2-3/4" Flanges
NEW Agilent Varian IDP-07 IDP07 IDP7 Dry Scroll Vacuum Pump, 1-Phase, PN X3807-64010 with Inlet Isolation Valve
Quality Laboratory Planetary Ball Mill Machine for Battery Materials Grinding
New Bearing Cap for Leybold 150 CSV Turbopump
Wholesale KF-16 Vacuum Bellows Hose, 80 Inch, ISO-KF Flange Size NW-16, Stainless Steel
Adapter KF 50 (NW 50) to 1/8 NPT-Female, Flange ISO-KF, NW-50, Stainless Steel Hardware 



