Dimention
Notice

NPT.NPS

NOMINAL
SIZE

In units of inch

NPT

 NPS
　 Use and entangle the occasion of Occasion of that do not use entangling
1/16-27 6.10(0.240) 6.25(0.246) 6.35(0.250)
1/8-27 8.33(0.328) 8.43(0.322) 8.74(0.344)
1/4-18 10.72(0.422) 11.13(0.438) 11.13(0.438)
3/8-18 14.27(0.562) 14.27(0.562) 14.68(0.578)
1/2-14 17.48(0.688) 17.86(0.703) 18.26(0.719)
3/4-14 22.63(0.891) 23.01(0.906) 23.42(0.922)
1/11 1/2 28.58(1.125) 28.98(1.141) 29.36(1.156)
1 1/4-11 1/2 37.31(1.469) 37.69(1.484) 38.10(1.500)
1 1/2-11 1/2 43.66(1.719) 44.04(1.734) 44.45(1.750)
2-11  1/2 55.58(2.188) 55.96(2.203) 56.36(2.219)
2 1/2-8 65.89(2.594) 66.68(2.625) 67.46(2.656)

NPTF.NPSF

In units of inch

NPTF

 NPSF
Use and entangle the occasion of Occasion of that do not use entangling
5.94(0.234) 6.25(0.246) 6.35(0.250)
8.33(0.328) 8.61(0.339) 8.74(0.344)
10.72(0.422) 11.13(0.438) 11.28(0.444)
14.27(0.562) 14.68(0.578) 14.68(0.578)
17.48(0.688) 17.86(0.703) 18.26(0.719)
22.63(0.891) 23.42(0.922) 23.42(0.922)
28.58(1.125) 29.36(1.156) 23.96(1.156)
37.31(1.469) 38.10(1.500) 　
43.26(1.703) 44.04(1.734) 　
55.58(2.188) 55.36(2.219) 　
65.89(2.594) 67.68(2.641) 　

PT

NOMINAL
SIZE

In units of inch
 

BASIC DIA

 Length of the effective spiral shell's tooth department Standard length
  Use and entangle the occasion of Occasion of that do not use entangling
PT 1/16-28 6.10 6.20 6.244 6.384
PT 1/8-28 8.10 8.20 8.249 8.398
PT 1/4-19 10.70 11.00 10.962 11.174
PT 3/8-19 14.2 14.5 14.448 14.658
PT 1/2-14 17.6 18.0 17.979 18.263
PT 3/4-14 23.0 23.5 23.378 23.663
PT 1-11 29.0 29.5 29.459 29.822
PT 1 1/4-11  37.5 38.0 37.976 38.339
PT 1 1/2-11  43.4 44.0 43.689 44.232
PT 2-11 54.9 55.5 55.412 55.844

UNF NORMAL SIZE AND BASIC DIA - H
UNF

NOMINAL SIZE

BASIC  DIA

H
7/16X20 9.8 1/4
1/2X20 11.50 5/16
9/16X18 12.90 3/8
3/4X16 17.50 1/2
7/8X14 20.50 5/8
1 1/16X12 24.90 3/4
1 5/16X12 31.30 1"
1 5/8X12 39.30 1 1/4
1 7/8X12 45.60 1 1/2
2 1/2X12 61.55 2"

PS

NOMINAL
SIZE

BASIC DIA

 Internal diameter
D1

MAX

 D1

MIN
PS 1/16-28 6.50 6.632 6.490
PS 1/8-28 8.50 8.637 8.495
PS 1/4-19 11.40 11.549 11.341
PS 3/8-19 15.0 15.054 14.846
PS 1/2-14 18.5 18.773 18.489
PS 3/4-14 24.0 24.259 23.975
PS 1-11 30.2 30.471 30.111
PS 1 1/4-11  38.8 39.132 38.772
PS 1 1/2-11  44.8 45.025 44.665
PS 2"-11 56.5 56.836 56.476

PF

NOMINAL
SIZE

BASIC DIA

 AB Internal diameter
D1

MAX

 D1

MIN
PF 1/16-28 6.70 6.843 6.561
PF 1/8-28 8.70 8.848 8.566
PF 1/4-19 11.70 11.890 11.445
PF 3/8-19 15.2 15.395 14.950
PF 1/2-14 19.0 19.172 18.631
PF 5/8-14 21.0 21.128 20.578
PF 3/4-14 24.5 24.658 24.117
PF 7/8-14 28.2 28.418 27.877
PF 1-11 30.5 30.931 30.291
PF 1 1/8-11 35.2 35.579 34.939
PF 1 1/4-11 39.2 39.592 38.952
PF 1 1/2-11 45.0 45.485 44.845
PF 1 3/4-11 51.0 51.428 50.788
PF 2"-11 57.0 57.296 56.656

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