Part 25

25.mm

Feather key fixing, 25t x ¼'' & 20t x 7/32''
25.mm1

Feather & tongue key, otherwise as above
25.mm2

Tongue key fixing, 25t x ¼'' & 20t x 7/32''
25.mm3

Tongue key fixing, now ¼'' wide
25.br1

Single-tapped boss, 25 and 20 teeth
25.br1a

Single-tapped boss, 3/16'' face †
25.br1

Single-tapped, pre-war 25 and 19 teeth
25.br2

Double-tapped, pre-war 25 and 19 teeth
25.br

Double-tapped, post-war markings

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