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■ 不同點 Difference


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.





■ JIS B0203-1982 管用推拔螺紋 Taper pipe threads


規格本體之螺紋

(依ISO 7/1)

推拔外螺紋:R

推拔內螺紋:Rc

平行內螺紋:Rp

附屬書之螺紋

推拔外螺紋:PT

推拔內螺紋:PT

平行內螺紋:PS

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