Specifications of International Thread Standards

UNS - Unified Special Thread Series, which is used for special purposes.
The flank angle is 60°.

Nominal
Diameter
Major
Diameter
Inch
Major
Diameter
mm
Tapping
Drill Size
mm
TPIPitch
mm
10 - 28 UNS0.19004.8263.95280.907
10 - 36 UNS0.19004.8264.15360.706
10 - 40 UNS0.19004.8264.20400.635
10 - 48 UNS0.19004.8264.35480.529
10 - 56 UNS0.19004.8264.39560.454
12 - 36 UNS0.21605.4864.80360.706
12 - 40 UNS0.21605.4864.90400.635
12 - 48 UNS0.21605.4864.98480.529
12 - 56 UNS0.21605.4865.05560.454
1/4" - 24 UNS0.25006.3505.35241.058
1/4" - 27 UNS0.25006.3505.45270.941
1/4" - 36 UNS0.25006.3505.70360.706
1/4" - 40 UNS0.25006.3505.75400.635
1/4" - 48 UNS0.25006.3505.85480.529
1/4" - 56 UNS0.25006.3505.95560.454
5/16" - 27 UNS0.31257.9387.10270.941
5/16" - 36 UNS0.31257.9387.25360.706
5/16" - 40 UNS0.31257.9387.40400.635
5/16" - 48 UNS0.31257.9387.50480.529
3/8" - 18 UNS0.37509.5258.20181.411
3/8" - 27 UNS0.37509.5258.70270.941
3/8" - 36 UNS0.37509.5258.90360.706
3/8" - 40 UNS0.37509.5259.00400.635
0,390" - 27 UNS0.39009.9069.00270.941
7/16" - 18 UNS0.437511.1129.75181.411
7/16" - 24 UNS0.437511.11210.10241.058
7/16" - 27 UNS0.437511.11210.20270.941
1/2" - 12 UNS0.500012.70010.75122.117
1/2" - 14 UNS0.500012.70011.00141.814
1/2" - 18 UNS0.500012.70011.40181.411
1/2" - 24 UNS0.500012.70011.70241.058
1/2" - 27 UNS0.500012.70011.85270.941
9/16" - 14 UNS0.562514.28812.60141.814
9/16" - 27 UNS0.562514.28813.40270.941
5/8" - 14 UNS0.625015.87514.20141.814
5/8" - 27 UNS0.625015.87515.00270.941
3/4" - 14 UNS0.750019.05017.40141.814
3/4" - 18 UNS0.750019.05017.75181.411
3/4" - 24 UNS0.750019.05018.10241.058
3/4" - 27 UNS0.750019.05018.20270.941
7/8" - 10 UNS0.875022.22519.75102.540
7/8" - 18 UNS0.875022.22521.00181.411
7/8" - 24 UNS0.875022.22521.20241.058
7/8" - 27 UNS0.875022.22521.40270.941
1" - 10 UNS1.000025.40023.00102.540
1" - 14 UNS1.000025.40023.75141.814
1" - 18 UNS1.000025.40024.25181.411
1" - 24 UNS1.000025.40024.50241.058
1" - 27 UNS1.000025.40024.50270.941
1 1/8" - 10 UNS1.125028.57526.25102.540
1 1/8" - 14 UNS1.125028.57527.00141.814
1 1/8" - 24 UNS1.125028.57527.75241.058
1 1/4" - 10 UNS1.250031.75029.50102.540
1 1/4" - 14 UNS1.250031.75030.00141.814
1 1/4" - 24 UNS1.250031.75030.75241.058
1 3/8" - 10 UNS1.375034.92532.60102.540
1 3/8" - 14 UNS1.375034.92533.30141.814
1 1/2" - 10 UNS1.500038.10035.70102.540
1 1/2" - 14 UNS1.500038.10036.50141.814
1 1/2" - 24 UNS1.500038.10037.30241.058
1 5/8" - 10 UNS1.625041.27539.00102.540
1 5/8" - 14 UNS1.625041.27539.50141.814
1 5/8" - 24 UNS1.625041.27540.35241.058
1 3/4" - 10 UNS1.750044.45042.00102.540
1 3/4" - 14 UNS1.750044.45042.85141.814
1 3/4" - 18 UNS1.750044.45043.25181.411
1 7/8" - 10 UNS1.875047.62545.30102.540
1 7/8" - 14 UNS1.875047.62546.00141.814
1 7/8" - 18 UNS1.875047.62546.35181.411
2" - 10 UNS2.000050.80048.40102.540
2" - 14 UNS2.000050.80049.25141.814
2" - 18 UNS2.000050.80049.50181.411
2 1/16" - 16 UNS2.062552.38751.00161.587
2 3/16" - 16 UNS2.187555.56354.10161.587
2 1/4" - 10 UNS2.250057.15054.75102.540
2 1/4" - 14 UNS2.250057.15055.50141.814
2 1/4" - 18 UNS2.250057.15055.75181.411
2 5/16" - 16 UNS2.312558.73757.30161.587
2 7/16" - 16 UNS2.437561.91260.50161.587
2 1/2" - 10 UNS2.500063.50061.20102.540
2 1/2" - 14 UNS2.500063.50061.75141.814
2 1/2" - 18 UNS2.500063.50062.30181.411
2 3/4" - 10 UNS2.750069.85067.50102.540
2 3/4" - 14 UNS2.750069.85068.25141.814
2 3/4" - 18 UNS2.750069.85068.50181.411
3" - 10 UNS3.000076.20073.80102.540
3" - 14 UNS3.000076.20074.50141.814
3" - 18 UNS3.000076.20075.00181.411
3 1/4" - 10 UNS3.250082.55080.25102.540
3 1/4" - 14 UNS3.250082.55081.00141.814
3 1/4" - 18 UNS3.250082.55081.25181.411
3 1/2" - 10 UNS3.500088.90086.55102.540
3 1/2" - 14 UNS3.500088.90087.25141.814
3 1/2" - 18 UNS3.500088.90087.60181.411
3 3/4" - 10 UNS3.750095.25093.00102.540
3 3/4" - 14 UNS3.750095.25093.60141.814
3 3/4" - 18 UNS3.750095.25094.00181.411
4" - 10 UNS4.0000101.60099.30102.540
4" - 14 UNS4.0000101.600100.00141.814
4 1/4" - 10 UNS3.2500107.950105.60102.540
4 1/4" - 14 UNS4.2500107.950106.30141.814
4 1/2" - 10 UNS4.5000114.300112.00102.540
4 1/2" - 14 UNS4.5000114.300112.65141.814
4 3/4" - 10 UNS4.7500120.650118.35102.540
4 3/4" - 14 UNS4.7500120.650119.00141.814
5" - 10 UNS5.0000127.000124.70102.540
5" - 14 UNS5.0000127.000125.35141.814
5 1/4" - 10 UNS5.2500133.350131.00102.540
5 1/4" - 14 UNS5.2500133.350131.70141.814
5 1/2" - 10 UNS5.5000139.700137.40102.540
5 1/2" - 14 UNS5.5000139.700138.00141.814
5 3/4" - 10 UNS5.7500146.050143.75102.540
5 3/4" - 14 UNS5.7500146.050144.40141.814
6" - 10 UNS6.0000152.400150.00102.540
6" - 14 UNS6.0000152.400150.75141.814
UNS Thread