PIPE THREADS AND TOOL SELECTION

ParallelPipeThreadsG(PF)

Thread TypeNumber of threadsStandard internal diameter
G1/1628.258"
G1/8.337"
G1/4.451"
G3/819.589"
G1/2.734"
G5/814.811"
G3/4.949"
G7/81.098"
G11.193"
G1·1/8111.376"
G1·1/41.534"

Note 1) Same as PF.

TaperPipeThreadsR(PT),Rc(PS)

G

Thread TypeNumber of threadsStandard internal diameter
R1/1628.258"
R1/8.337"
R1/4.451"
R3/819.589"
R1/214.734"
R3/414.949"
R1111.193"
R1·1/4111.534"

Note 1) Same as Rc and PT.

  • The pitch is pre-determined for each nominal diameter. Note the minimum machining diameter especially when internal threading.