Part 30c
30c.br2) Incorrectly cut 45° teeth, single-tapped, no holes | 30c.br4) Centre not recessed, correct teeth, double-tapped | 30c.br) Flats on teeth, double-tapped post-war stamping | 30c.br1) Sintered brass, double-tapped |
| 30c.br2 Incorrectly cut 45° teeth, single-tapped, no holes | 30c.br4 Centre not recessed, correct teeth, double-tapped | 30c.br Flats on teeth, double-tapped post-war stamping | 30c.br1 Sintered brass, double-tapped |