Ring tongue terminal for 20 AWG, #8 stud
The 1577623-1 is a PIDG, Strato-Therm ring tongue terminal for 20 AWG wire, terminated with a crimp onto a #8 stud. The nickel-plated copper contact is 0.031" thick, the insulation is polymer thermoplastic, and the serrated termination grips the conductor.
Stud size selection across the series
Within the PIDG, Strato-Therm series the 1577623-1 (#8 stud) sits between the #4-stud 1577622-1 and the #10-stud 1577624-1; the #6-stud 1577625-1 is shorter overall at 0.708" and narrower at 0.218". All four terminals accept the same 20 AWG wire and use the same 0.045" to 0.080" insulation diameter range, so the stud size is the only selection variable.