QMA Snap-On Jack for RG-174 Cable Runs
The 930-124J-51S: The snap-on fastening mates in a fraction of a second compared to a standard SMA, at the cost of a lower mating cycle budget — 100 cycles is the rated limit, so this connector suits test-point and field-swap applications rather than permanent hardline runs. The white bronze body finish on the brass shell provides corrosion resistance without the galvanic mismatch risk of nickel on stainless in outdoor enclosures.
Cable Termination and Field Fit
This hybrid termination is standard for semi-rigid and flexible coax up to 0.100-inch diameter — the listed cable group covers RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174. The beryllium copper center contact with gold plating handles the 100-cycle mating life without fretting corrosion at the interface. Mounting is bulkhead front-side nut: the jack passes through a panel hole, the lockwasher seats against the panel face, and the hex nut tightens from the outside. The PTFE dielectric maintains consistent impedance through the transition from cable to connector body.