1962 Catalog drawing vs actual
Square | Size | Date range |
F-081 | ¼ | 1962-1995 |
F-101 | 5/16 | 1962-1995 |
F-121 | 3/8 | 1948-1995 |
F-141 | 7/16 | 1948-1995 |
F-151 | 13/32 | 1967-1995 |
F-161 | ½ | 1948-1995 |
F-171 | 17/32 | 1948 – 1953 |
F-181 | 9/16 | 1948-1995 |
F-191 | 19/32 | 1948-1995 |
F-201 | 5/8 | 1948-1995 |
F-221 | 11/16 | 1948-1995 |
F-241 | ¾ | 1948-1995 |
F-261 | 13/16 | 1948-1995 |
F-281 | 7/8 | 1948-1995 |
F-301 | 15/16 | 1965-1995 |
F-321 | 1 | 1965-1995 |