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4.5.5.2 LOCK NUTS (STATE STANDARD 8961-75 )
Figure 4.27 – Conventional drawings of lock nut
Table 4.13
Nominal Thread External Internal H, mm D, mm S, mm Chamfer
bore, Dy, G, inch diameter, diameter, mm с, mm
mm mm
10 3/8 16.663 14.951 7 31,2 27 1
15 1/2 20.956 18.532 8 36,9 32 1,5
20 3/4 26.442 24.119 9 41,6 36 1,5
25 1 33.25 30.292 10 53,1 46 2
32 1 41.912 38.954 11 63,5 55 2
40 1 47.805 44.847 12 69,3 60 2
50 2 59.616 56.659 13 86,5 75 2
The example of the conventional denotation of a lock-nut with the nominal bore 20 mm:
Lock-nut 20 State Standard 8961-75.
4.5.5.3 PIPE COUPLINGS (STATE STANDARD 8955-75)
Figure 4.28 – Conventional drawings of pipe coupling
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