The INGUN KS-215 M1.6-F is a screw-in receptacle from INGUN's quick-change (Schnellwechselsystem) sub-series. It threads into the fixture plate rather than being pressed in, so a receptacle can be removed and refitted during rework, and the quick-change head lets the contact be exchanged without dismantling the plate assembly.
The body is 2 mm outer diameter into a 1.99 mm hole, with a near-flush 0.2 mm collar, and it is long at 42.9 mm — roughly 16 mm more than the plain press-in KS-215, which is what the threaded quick-change head adds. INGUN lists the receptacle connection as plug / open, and this variant is vacuum-tight, so it suits vacuum-actuated fixtures.
Total length 42.9 mm (1.68 in), outer diameter 2 mm (.078 in)
Collar diameter 2.2 mm, collar height 0.2 mm; no press ring
