Affiliated Steel & Tube offers pipe threading for both carbon and stainless steel pipes using the National Pipe Threading (NPT) standards (ANSI/ASME B1.20.1). Our services include 1/8" to 4" pipes, up to schedule 40.
Pipe Thread Sizes
Nominal NPT Size
Outer Diameter
Threads per inch
Pitch of Thread
1/8"
0.405"
27
0.03704
1/4"
0.540"
18
0.05556
3/8"
0.675"
18
0.05556
1/2"
0.840"
14
0.07143
3/4"
1.050"
14
0.07143
1"
1.315"
11 1/2
0.08696
1 1/4"
1.660"
11 1/2
0.08696
1 1/2
1.900"
11 1/2
0.08696
2"
2.375"
11 1/2
0.08696
2 1/2"
2.875"
8
0.12500
3"
3.500"
8
0.12500
4"
4.500"
8
0.12500
For a quote or to order services, please call customer service at 909.923.8005 or complete the online RFQ.
More Info
Our Motto
Committed to quality products, superior service & fair pricing.
Mission Statement
Our mission is to be the best in service, quality, and expertise, while maintaining personable and friendly service.
Minority Owned
Affiliated Steel & Tube is recognized as a minority woman owned business by the Minority Business Development Council of Southern California. As a member, we can help businesses like yours meet your company's diversity programs.
Pipe Threading