標準號：BS 7794-1995
中文標準名稱：電動套管扳手用方形驅動套管、驅動方頭和附件規范
英文標準名稱：Specification for square-drive sockets, driving squares and accessories for power-driven socket wrenches
標準類型：J47
發布日期：1995/11/15 12:00:00
實施日期：1995/11/15 12:00:00
中國標準分類號：J47
適用范圍：This British Standard specifies design and dimensional requirements for the following components of power-driven socket wrenches: a) 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; b) driving squares; c) 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.