LDS Vacuum NW40‑150‑SF Short Weld Neck Flange

This NW40‑series short weld neck flange, part number NW40‑150‑SF, provides a robust, high‑vacuum compatible welding termination for 1.50″‑OD standard tubing, with a standardized NW40 (KF40 / QF40) mating face. Its compact “short neck” design helps minimise internal dead volume and ease installation into vacuum systems with limited space. Fabricated from 304 stainless steel, this weldable flange ensures vacuum‑tight connections when properly mated with a centering ring, clamp, and matching NW40 flange.

Ideal for vacuum piping systems, instrumentation ports, or custom vacuum chamber fabrication where a welded termination is required. As a surplus inventory listing, this component supports restoration or new build of vacuum systems in research, lab‑engineering, or process environments — a good fit for your professional‑user audience (scientists, engineers, educational institutions).

Typical Applications:

• Vacuum chamber feedthroughs and ports

• Custom vacuum line fabrication in R&D or educational labs

• Instrumentation mounting in analytic vacuum systems

• Systems requiring NW40 mating face compatibility (KF40 / QF40)