IS 2473 : 1975 Dimensions for centre holes
| UDC 621.9 - 229.335 : 389.83 | PGD 20 |
|
| Reaffirmed 2018 |
1 Scope
Prescribes dimensions for the following three types of centreholes:
Type A - Centre holes without protecting chamfers
Type B - Centre holes with protecting chamfers
Type R - Centre holes with radius form