Whitworth thread (55? thread angle).
Pitch: 60-48TPI
55? thread angle
Insize 4809, U.S. STAND SHEET METAL GAGE, 0-36(.3125~.0070"), 6928640330162
Insize 4808, WIRE GAGE, 0-36(.3249~.0050"), 6928640330155
3M 14211, Roloc Disc Pad TS and TSM, Medium 2 in 1/4-20 Internal, 7000045283
Insize 0110-1125, ANEMOMETER, 6974029776595
Insize 7231, SCRIBER, 6928640320071
Insize 4809, U.S. STAND SHEET METAL GAGE, 0-36(.3125~.0070"), 6928640330162
Insize 4808, WIRE GAGE, 0-36(.3249~.0050"), 6928640330155
3M 14211, Roloc Disc Pad TS and TSM, Medium 2 in 1/4-20 Internal, 7000045283
Insize 0110-1125, ANEMOMETER, 6974029776595
Insize 7231, SCRIBER, 6928640320071
Whitworth thread (55? thread angle).
Pitch: 60-48TPI
55? thread angle
