• for Pipe Threads
  • for Pipe Threads

Unit : mm Unit : mmUnit : mm Unit : mm

SizeMinor Diameter of JIS Max.internal thread (D1) Min.Bored hole size ( ref.)
PF1/16 - 286.8436.5616.77
PF1/8 - 288.8488.5668.78
PF1/4 - 1911.89011.44511.78
PF3/8 - 1915.39514.95015.28
PF1/2 - 1419.17218.63119.0
PF5/8 - 1421.12820.58721.0
PF3/4 - 1424.65824.11724.5
PF7/8 - 1428.41827.87728.3
PF1 - 1130.93130.29130.8
PF1 1/8-1135.57934.93935.4
PF1 1/4-1139.59238.95239.4
PF1 1/2-1145.48544.84545.3
PF1 3/4-1151.42850.78851.3
PF2 - 1157.29656.65657.1
PF2 1/2-1172.86672.22672.7
PF3 - 1185.56684.92685.4
PF31/2-1198.01297.37297.9
PF4 - 11110.712110.072110.6
  • for American Standard Pipe Thread
Unit : mm
SizeMinor diameter o Max.f internal threads Min.Bored hole size ( ref.)
1/16-27NPSC6.6046.3006.53
1/8-27NPSC8.9408.6368.86
1/4-18NPSC11.63311.22711.53
3/8-18NPSC15.08714.65614.98
1/2-14NPSC18.64318.16118.5
3/4-14NPSC24.00323.49523.9
1 -111/2NPSC30.07329.49029.9
11/4-111/2NPSC38.83638.25338.7
11/2-111/2NPSC44.90744.32344.8
2 -111/2NPSC56.94656.36356.8
Minor diameter ofinternal threadsBored hole size
SizeMax.Min.( ref.)
1/16-27NPSM6.9086.7316.86
1/8-27NPSM9.2459.0949.21
1/4-18NPSM12.21711.88812.13
3/8-18NPSM15.54415.31715.49
1/2-14NPSM19.27818.97419.2
3/4-14NPSM24.63824.33424.6
1 -111/2NPSM30.75930.50630.7
11/4-111/2NPSM39.49739.26939.4
11/2-111/2NPSM45.56745.33945.5
2 -111/2NPSM57.60757.37957.6
  • for Dryseal American Standard Pipe Thread
Unit : mm
SizeMinor diameter o Max.f internal threads Min.Bored hole size ( ref.)
1/16-27NPSF6.4826.3056.44
1/8-27NPSF8.8298.6528.78
1/4-18NPSF11.45511.23211.40
3/8-18NPSF14.89214.67214.84
1/2-14NPSF18.37418.11818.3
3/4-14NPSF23.72123.46523.7
1 -111/2NPSF29.75829.46429.7
11/4-111/2NPSF38.51438.22038.4
11/2-111/2NPSF44.58444.29044.5
2 -111/2NPSF56.62156.32856.5