统一螺钉（UNM）标称尺寸（mm）1/4的水量表 线程仪 WR1/4-28UNF2A

Gage type: ANSI B1.2
Nominal dimension (mm): 1/4
Pitch (mm): 28
Grade (class): 2A
Pitch (number of peaks/inch): 28
Nominal dimension: 1/4
Gage type: Straight, stop

ohns（相当于JIS SKS3）

75G

-

-

-

-

-