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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).
Table of square collar nuts, requesting models be made from drawing Lec.2590 for inspection.

Identifier  ExFiles\Box 77\5\  scan0234
Date  12th September 1928
  
BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer}

c. to BJ. RG.{Mr Rowledge} Hs.{Lord Ernest Hives - Chair}

X.1221

E1/M12.9.28.

TABLE OF SQUARE COLLAR NUTS.

We send you herewith drg.Lec.2590 shewing above.

These are intended for use in connection with set screws where it is desired the nut should not turn round, XX the nut being close to an abutment, or where a nut is used on each end of a stud one of these nuts being arranged not to turn.

We should be glad if you would kindly instruct a set of models to be made to this drg., and sent to WW. for inspection.

E.{Mr Elliott - Chief Engineer}
  
  


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