From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Required size reduction for 2 BA square collar nuts from .350 to .343.
| Identifier | WestWitteringFiles\T\2July1928-December1928\ Scan185 | |
| Date | 11th June 1928 | |
| BY (struck through) FROM E.{Mr Elliott - Chief Engineer} Copy to Ps (struck through) HS.{Lord Ernest Hives - Chair} ORIGINAL E1/M6.11.28. SQUARE COLLAR NUTS - LeC.2590. V1221 Regarding the models of the above brought here by HS.{Lord Ernest Hives - Chair}, we think there is just one alteration needed, and that is, a slight reduction in the size of the square of the 2 BA. This should be altered from .350 to .343. The latter size being a 32 dimension will most probably be more convenient as regards purchasing the square bar. E.{Mr Elliott - Chief Engineer} | ||