Skip Navigation Links
 Home 
 Products Expand  Products 
 Reference Expand  Reference 
 Bookstore 
 Contact 

Pipe Threads

  American Standard British Standard
Nominal OD Threads per Inch Nominal Outside Pipe Diameter (inches) Approximate Length of Thread (inches) Approximate Total Thread Makeup (inches) NPT Straight NPS Threads per Inch Drill
Drill with Tapered Reamer Drill w/o Tapered Reamer
1/16 27 0.313     15/64 D 1/4 28 G
1/8 27 0.405 3/8 1/4 21/64 R S 28 11/32
1/4 18 0.540 5/8 3/8 27/64 7/16 29/64 19 15/32
3/8 18 0.675 5/8 3/8 9/16 37/64 19/32 19 39/64
1/2 14 0.840 3/4 7/16 11/16 23/32 47/64 14 3/4
5/8 -   -   - - - 14 53/64
3/4 14 1.050 3/4 1/2 57/64 59/64 15/16 14 31/32
7/8 -   -   - - - 14 1-7/64
1 11.5 1.315 7/8 9/16 1-1/8 1-5/32 1-3/16 11 1-7/32

 


 
Copyright © Armstrong Metalcrafts 2011-2024    Privacy Notice