The INGUN KS-113 30 (INGUN item KS-11330) is a press-in receptacle on a 3 mm body. It is pressed into the fixture's probe plate and the probe plugs into it, so a worn probe can be replaced without unsoldering or rewiring the fixture.
This is a short, large-bore receptacle: 25 mm overall with a near-flush 0.2 mm collar, into a 2.98 – 2.99 mm hole. The combination suits heavier contacts in a shallow plate stack — a bigger barrel than the KS-112 for more current-carrying and mechanical support, without the extra length of the KS-150.
Total length 25 mm (.984 in), outer diameter 3 mm (.118 in)
Collar diameter 3.2 mm, collar height 0.2 mm; no press ring
