ASME B1.160° flank

Unified National Coarse Threads

The inch coarse series. Sizes below 1/4 in are designated by number (#4, #10) rather than by diameter, and those numbers are gauge numbers, not any fraction of an inch: #4 measures 0.112 in. 25 designations are listed here, all quoted in inches.

Dimensions

in
DesignationTPIMajor (in)Pitch Ø (in)Minor ext (in)Tap drill (in)
#1-64 UNC640.07280.0630.05390.0575
#2-56 UNC560.08580.07440.06420.0681
#3-48 UNC480.09880.08540.07360.0783
#4-40 UNC400.11180.09570.08150.087
#5-40 UNC400.12480.10870.09450.1
#6-32 UNC320.13820.11770.09960.1067
#8-32 UNC320.16420.14370.12560.1327
#10-24 UNC240.19020.1630.1390.1484
#12-24 UNC240.21610.1890.1650.1744
1/4-20 UNC200.250.21770.18860.2
5/16-18 UNC180.31260.27640.24450.2571
3/8-16 UNC160.37480.33430.29840.3126
7/16-14 UNC140.43740.39090.350.3661
1/2-13 UNC130.50.450.40550.4232
9/16-12 UNC120.56260.50830.46020.4791
5/8-11 UNC110.62520.56610.51340.5343
3/4-10 UNC100.750.6850.62720.65
7/8-9 UNC90.87480.80280.73860.7638
1-8 UNC810.91890.84650.8748
1-1/8-7 UNC71.12481.03230.94960.9823
1-1/4-7 UNC71.251.15711.07481.1071
1-3/8-6 UNC61.37481.26691.17051.2083
1-1/2-6 UNC61.51.39171.29571.3335
1-3/4-5 UNC51.751.62011.50471.55
2 UNC4.521.85551.72761.778

Other thread systems