IS 8721 : 1978 Specification for Fish Bolts (Cup Oval Neck Bolts) for Collieries
| UDC 621.882.64 : 622.625.143.42 | PGD 37 |
|
| Reaffirmed 2021 |
1 Scope
Covers the requirements of fish bolts with cup head and ovalneck for use in collieries in the diameter range 10 to 22 mm.