管用螺纹

附屬書

JIS0202 Appendix

規格本體

JIS0202 Text

螺紋記號

Screw thread abbreviation

PF

G

標稱範圍

Range of thread size

PF1/8∼PF12"

G1/16∼G6"

等級

Classes

外螺紋、內螺紋有A級、B級

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

外螺紋有A級、B級，內螺紋沒有等級

Only the external thread is divided into classes A & B

標稱1/8∼6"之外螺紋(A級、B級)及母螺紋

(A級)雖有規定外事項，但其容許差和規格本體之規定相同。

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.