d Threads per inch
d hreads per inch
1/4 28
1/2 20
7/8 14
5/16 24
9/16 18
1.IN.-12G 12
3/8 24
5/8 18
1.IN.-14G 14
7/16 20
3/4 16
1.1/8 14
Thread
Material
Class
Surface treatment
Packaging
Code
UNF
St
≥4.8
Zipl
3 feet
Standard
20290