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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).
Blueprint for a 'KTB' Type 'K' Drip Plug, showing dimensions and a table of part numbers.

Identifier  ExFiles\Box 26\5\  Scan202
Date  10th February 1928
  
B-1772
3/8
11/16
5/16
3/32
3/8 - 24 S.A.E. THREAD.
5/8
9/16
7/16 HEX.
BIJUR KTB
RATE NO.
1/8 PIPE THREAD.
NOTE
-PATENTS PENDING-
UNLESS OTHERWISE SPECIFIED
TOLERANCE OF ALL DIMENSIONS
IS PLUS OR MINUS .010"
PRINTED ON TRACING PAPER 197 K & E CO., N.Y.
TABLE:
RATE | SYMBOL | PART NO
00 | KTB-00 | B-1773
0 | KTB-0 | B-1774
1 | KTB-1 | B-1775
2 | KTB-2 | B-1776
3 | KTB-3 | B-1777
4 | KTB-4 | B-1778
5 | KTB-5 | B-1779
6 | KTB-6 | B-1780
BIJUR LUBRICATING CORP., N.Y.
DRIP PLUG "KTB" TYPE "K"
DR. HM.{Capt. W. Hallam - Head Repairs} DT. 10.2.28
CK{Mr Clark}'D.{John DeLooze - Company Secretary} DT.
B-1772
  
  


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