BS 7794:1995

This standard BS 7794:1995 Specification for square-drive sockets, driving squares and accessories for power-driven socket wrenches is classified in these ICS categories:

• 25.140.30 Hand-operated tools

This British Standard specifies design and dimensional requirements for the following components of power-driven socket wrenches:

1. square-drive sockets for metric bolts, nuts and machine screws specified in:

   BS 3692 : 1967, BS 4183 : 1967, BS 4190 : 1967,

   BS 4395 : Parts 1 and 2 : 1969, BS 4929 : 1973;

2. driving squares;

3. accessories: square-drive converters, extensions and universal joints.

The dimensional requirements for comparable sockets for the inch series of bolts, nuts and machine screws are specified in annexes A and B.

Annex C gives notes on the safe usage of power-driven sockets and accessories, and annex D describes two types of retaining device.