THREAD 1/4 x 28 SAE LT (SAE J534)
A. 35/64″
B. 3/16″
C. 7/64″
Hex size. 5/16″
Material. 1215
Zinc Finish. Yellow/Clear
Type. Straight

The ¼”x28 SAE-LT Taper Threads should be assembled into ¼”x28 UNF class 3B, straight threaded hole with a mínimum of 75% thread height.