1 4 28 unjf 3b July 8, 2019 16 32 64 128 1 4 28 unjf 3b thread dimensions 1 4 28 unjf 3b minor diameter 1 4 28 unjf 3b tap 1 4 28 unjf 3b drill size 1 4 28 unjf 3b thread gage 1 2 3 4 серия
