Standard No.:	GB/T 4389-2013
English Name:	Double-headed open-ended wrenches,double-headed box wrenches and combination wrenches—Maximum widths of heads
Chinese Name:	双头呆扳手、双头梅花扳手、两用扳手 头部外形的最大尺寸
Chinese Classification:	J47    Hand tool
Professional Classification:	GB    National Standard
ICS Classification:	25.140.30 25.140.30    Including wrenches, screwdrivers, pliers, nippers, hammers, etc. 25.140.30
Issued by:	AQSIQ;SAC
Issued on:	2013-11-12
Implemented on:	2014-5-1
Status:	valid
Superseding:	GB/T 4389-1995 Assembly tool for screws and nuts-Openend double-head engineers wrenches,double-head box wrenches and combination wrenches-Maximum outside dimensions of heads
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	140.0
Delivery:	via email in 1~3 business day

本标准规定了双头呆扳手、双头梅花扳手、两用扳手头部外形的最大尺寸。
本标准适用于扳拧螺栓和螺母或其他紧固件的呆扳手、梅花扳手和两用扳手,上述扳手的命名与术语按照GB/T4625的规定。