JIS B 1004

Hole sizes before threading

English 1975
0.000
JIS
Detailed Information

This Japanese Industrial Standard specifies the diameters of holes to be drilled before threading the following screw threads or before carrying on similar works, hereinafter referred to as the hole size before “threading”.

The hole sizes before threading for the thread sizes M1.7 , M2.3 and M 2.6 shall comply with the Appendix to this standard.

Screw sizes M1 to M 68 specified in JIS B 0205.

Screw sizes No. 1-64 UNC to 4-4 UNC specified in JIS B 0206.

Nominal diameters 1 to 300 mm specified in JIS B 0207.

Screw sizes No. 0-80 UNF to 1 1/2-12 UNF specified in JIS B 0208.

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