Unified Full Nuts

ANSI / ASME B18.2.2

Materials and Finishes:

Steel/Zinc & clear 

Stainless steel/Self colour 

Brass/Self colour

Please note: Not all sizes stated are available from stock, please enquire for availability.

Note: Due to the fact that fastening applications differ greatly, the below information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.

Dimension data
d (thread size)1/4 UNF5/16 UNF3/8 UNF7/16 UNF1/2 UNF9/16 UNF5/8 UNF
1/4 UNC5/16 UNC3/8 UNC7/16 UNC1/2 UNC9/16 UNC5/8 UNC
m max0.2260.2730.3370.3850.4480.4960.559
s max0.4380.5000.5620.6880.7500.8750.938


d (thread size)3/4 UNF7/8 UNF1 UNF1.1/8 UNF1.1/4 UNF1.3/8 UNF1.1/2 UNF
3/4 UNC7/8 UNC1 UNC1.1/8 UNC1.1/4 UNC1.3/8 U1.1/2 UNC
m max0.6650.7760.8870.9991.0941.2061.317
s max1.1251.3121.5001.6881.8752.0622.250


Technical Support Articles
UNC thread sizes
UNF thread sizes
Tightening factors & tolerances