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 'Bentley' branded knock-on wheel nut.
| Identifier | ExFiles\Box 159\7\ scan0192 | |
| Date | 1st August 1934 | |
| R.R. 890 (5H)(67744-1-8-34) Ex.19319 R.H SIDE OF CAR. LETTERS .030 +.015 -.0 DEEP TO BE FILLED IN WITH BLACK ENAMEL WINCHESTER STYLE OF LETTERING OFF BENTLEY ON SPIN OVER WITH RING EX.19321 IN POSn (BEFORE) SWAGING RING MUST LIE ON BOTTOM FACE, & BE JUST FREE TO ROTATE. 4 HOLES .093 DIA EQUISPACED TO BE NICKEL DEPOSITED & CHROMIUM PLATED ALL OVER EXCEPT WHERE MARKED X. TO BE POLISHED WHERE MARKED P. TO BE TREATED WITH LANOLINE IN SOLUTION SECTION A.A. BORE 3.975 +.014 SCREW 3.500 DIA 8 TPI L.H. TRI Handwritten Stamp: ROLLS-ROYCE, LTD PAINT SHOP JUL 15 1935 DERBY Bottom Table: TITLE: WHEEL NUT - KNOCK ON TYPE MATERIAL: S/M SPEC No: 201.D HEAT TREAT: STANTON BRINELL: 187 - 247 SCALE: 1/1 MACHINE ALL OVER OR WHERE MARKED THUS ✓ RUDGE WHITWORTH. Table: REPLACE ALL COPIES TO: EXP. PATT. WORKS FORGE T.O. S.R. D.O. R.R. R.D. AMERICA T.D. COST TRACED: M.B. RUDGE WHIT. PRINT 8714 | ||