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).
Blueprint for a Screw with dimensions and material specifications.
| Identifier | ExFiles\Box 81\2\ scan0105 | |
| Date | 18th April 1922 | |
| 2173 /H 4234 /H Jay DRAWING NO E-18407. SEE ALSO THE FOLLOWING OPERATION DRAWINGS PIECE NO NOT TO BE MARKed ON. SLOT .050 +5 .250 +10 .156 +10 .025 RAD .625 +.30 .500 +.30 .183 DIA -2 45° +/-2° .025 +3 TURN .183 DIA-2 SCREW 10/32 A.S.M.E .300 -.10 DRILL .062 +5 .062 +/-10 TO BE LIGHTLY CASEHARDENED ALL OVER .010 TO .015 DEEP STAMP: NOV 1 1923 DRAWN BY TRACED BY: M.D.D. CHECKED BY: F.A.S. APPROVED BY: R.L.S.L. LIMITS ROLLS-ROYCE OF AMERICA, INC. MODEL: 40/50 SEC.: 5080 DATE: 4-18-22 SCALE: 2/1. NOT HEAT TREAT TITLE: SCREW BRINELL STANTON MACHINE ALL OVER MACHINE WHERE MARKED MATERIAL: S/M.{Mr Moon / Mr Moore} SPECIFICATION: 201. NO. OFF: 2 | ||