Product Overview
KF25 NW25 to 1/4 Inch Male NPT Vacuum Adapter for High Vacuum Plumbing
Condition
Single unit available. Unused NOS condition with no issues noted during visual evaluation. Evaluation: Visual inspection only. Function testing not performed. Packaging is a bit beat up, but the part is in great shape and looks unused. Genuine Kurt J. Lesker part obtained from a government research facility and covered by our No Hassle PartsMine Guarantee.
Ships same business day from Idaho. Packed carefully.
Product Overview
Kurt J. Lesker QF25XMNPT2 is a KF25 to 1/4 inch male NPT adapter for high vacuum systems. It provides a KF25 quick flange connection on one side and a 1/4 inch MNPT threaded connection on the other for gauges, vent valves, and gas line fittings.
Key Features
- KF25 flange size, also known as NW25 or QF25
- 1/4 inch male NPT threaded connection
- 304 stainless steel construction
- Flange OD: 1.57 inches
- High vacuum rating to 1.0 x 10^-8 Torr
- Temperature range: -60 C to 315 C, limited by the O-ring used in the clamp assembly
- Requires KF25 centering ring and KF25 wing-nut clamp on the flange side
Applications
- Mounting pressure gauges to KF25 vacuum systems
- Adding vent valves to forelines and roughing lines
- Connecting gas inlet plumbing to KF25 manifolds
- General high vacuum plumbing transitions from KF25 to NPT
Frequently Asked Questions
What thread does this adapter use?
It uses a 1/4 inch male NPT thread.
Will this fit BSP or metric threaded fittings?
No. It is not compatible with BSP or metric threads.
What KF hardware does this require?
It must mate with a KF25 NW25 QF25 flange and requires a KF25 centering ring and KF25 wing-nut clamp to seal.
Is this compatible with KF16, KF40, or KF50 systems?
No. It is sized for KF25 only.
Good fit for buyers who need a stainless KF25 to 1/4 inch MNPT transition fitting for gauges, valves, or gas lines. Verify thread standard before ordering to avoid NPT versus BSP mismatch.
