IS 7511 : Part 2 : 1986 DIMENSIONS FOR NECK FINISHES PART 2 SHALLOW CONTINUOUS THREAD FINISH FOR DEEP SCREW CAPS (R3/D) UDC 621.798.147 : 666.171.92 : 006.78 CHD 10
Reaffirmed 2017
Scope - Specifies dimensions for shallow continuous thread finish (R3/D) for use with deep screw caps.