IS 12166 : 1987 Specification for Ratchet Screwdrivers
| UDC 621.883.7 : 621.838 | PGD 34 |
|
| Reaffirmed 2013 |
1 Scope
Covers dimensions and other requirements of ratchet screwdrivers which incorporate an inbuilt ratchet mechanism, capable ofbeing reversed; and used for slotted and cross recessed headscrews.