ISO 2306 : 1972(R2016)现行
DRILLS FOR USE PRIOR TO TAPPING SCREW THREADS
出版：International Organization for Standardization
专家解读视频
Gives sizes for ISO internal and internal metric threads to various British Standards, and also gives alternative sizes.
DS 2062 : 1991 - Identical
SNV ISO 2306 : 1972 - Identical
ABNT NBR ISO 2306: 2019 - Identical
NBN E 66 101 : 1973 - Identical
BIS IS 10952 : 1984(R2015) - Identical
NBN E 66 101 : 1973 - Identical
DS 2062 : 1991 - Identical
BIS IS 10952 : 1984(R2015) - Identical
ABNT NBR ISO 2306: 2019 - Identical
SNV ISO 2306 : 1972 - Identical
