BS 949-4:1990現行
Screwing taps. Specification for metric ground thread taps: manufacturing tolerances
出版：British Standards Institution
專家解讀視頻
基本信息
標準編號： BS 949-4:1990
發布時間：1990/6/29 0:00:00
標準類別：Standard
出版單位：British Standards Institution
標準頁數：28
標準簡介
Manufacturing tolerances on the threaded portion of taps for producing ISO metric threads of tolerance classes 4H to 8H and 4G to 6G. Valid for short taps specified in ISO/R 529 as well as any other kind of ground thread taps with the same diameters and pitches.
標準備注
? British Standards Institution 2013
等同采用的國際標準
ISO 2857:1973 - Identical
