• for Pipe Threads
  • for Pipe Threads

Unit : mm Unit : mmUnit : mm Unit : mm

Minor Diameter of JIS internal thread (D ) Bored hole size Minor Diameter of JIS internal thread (DMinor Diameter of JIS internal thread (D) ) Bored hole sizeBored hole sizeBored hole size Bored hole size

Size 1 SizeSize 1 1

( ref.)Max.Min.( ref.)( ref.)( ref.)( ref.)
6.50PF1/16 - 286.8436.5616.77 6.50 6.776.77
PF1/8 - 288.8488.5668.78
8.508.78 8.508.78
PF1/4 - 1911.89011.44511.78
11.3011.78 11.3011.78
PF3/8 - 1915.39514.95015.28
14.90- 1415.28 14.9015.28
PF1/219.17218.63119.0
18.5PF5/8 - 1421.12820.58719.0 18.5 21.019.0
24.0PF3/4 - 1424.65824.11721.0 24.0 24.521.0
30.2PF7/8 - 1428.41827.87724.5 30.2 28.324.5
38.8PF 1- 1130.93130.29128.3 38.8 30.828.3
PF 1 1/8 -1135.57934.93935.4
44.730.8 44.730.8
PF 1 1/4 -1139.59238.95239.4
56.535.4 56.535.4
PF 1 1/2 -1145.48544.84545.3
PF 1 3/4 -1151.42850.78839.4 51.339.4
PF 2- 1157.29656.65645.3 57.145.3
PF 2 1/2 -1172.86672.22651.3 72.751.3
PF 3- 1185.56684.92657.1 85.457.1
PF 3 1/2 -1198.01297.37297.9
PF 4- 11110.712110.072110.6
  • for American Standard Pipe Thread

Unit : mm Unit : mm Minor diameter of internal threads Bored hole size Minor diameter of internal threads Bored hole size Size Size

Max.Min.( ref.)Max.Min.( ref.)
1/16 - 27NPSC6.6046.3006.531/16 - 27NPSM6.9086.7316.86
1/8 - 27NPSC8.9408.6368.861/8 - 27NPSM9.2459.0949.21
1/4 - 18NPSC11.63311.22711.531/4 - 18NPSM12.21711.88812.13
3/8 - 18NPSC15.08714.65614.983/8 - 18NPSM15.54415.31715.49
1/2 - 14NPSC18.64318.16118.51/2 - 14NPSM19.27818.97419.2
3/4 - 14NPSC24.00323.49523.93/4 - 14NPSM24.63824.33424.6
1 - 11 1/2NPSC30.07329.49029.91 - 11 1/2NPSM30.75930.50630.7
1 1/4 - 11 1/2NPSC38.83638.25338.71 1/4 - 11 1/2NPSM39.49739.26939.4
1 1/2 - 11 1/2NPSC44.90744.32344.81 1/2 - 11 1/2NPSM45.56745.33945.5
2 - 11 1/2NPSC56.94656.36356.82 - 11 1/2NPSM57.60757.37957.6
  • for Dryseal American Standard Pipe Thread

Unit : mm Minor diameter of internal threads Bored hole size Size

Max.Min.( 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 - 11 1/NPSF29.75829.464Technical Inf 29.7

2

1 1/4 - 11 1/2NPSF38.51438.22038.4
1 1/2 - 11 1/2NPSF44.58444.29044.5
2 - 11 1/2NPSF56.62156.32856.5