PIPE THREADS

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■ Difference


JIS0202 Appendix

JIS0202 Text

Screw thread abbreviation

PF

G

Range of thread size

PF1/8∼PF12"

G1/16∼G6"

Classes

Both external & internal thread are divided into classes A & B

Only the external thread is divided into classes A & B


The tolerances of the external and internalthreads of PF 1/8∼6" differ from the specifications in the Appendix, but they are the same as those specified in the Text.





■ JIS B0203-1982  Taper pipe threads


Symbol specified in

Text(in ISO7/1)

External taper thread:R

Internal taper thread:Rc

Internal parallel thread:Rp

Symbol specified

in Appendix

Externaltaperthread:PT

Internal taper thread:PT

Internal parallelthread:PS