3-1/2 Inch Nut 12 TPI x 1/4 Inch Thick NSN 5310-01-166-6393 BFVS Bradley

3-1/2 Inch Nut. 12 TPI x 1/4 Inch Thick. NSN 5310-01-166-6393. BFVS Bradley. Military spec means top quality. US steel. SPECS: AAJD Thread Class 2B AAJF Thread Direction Right-hand ACTA NUT Style Hexagon ADEA NUT Height 0.250 inches nominal ASDB Width Across Flats 4.590 inches nominal BZRR Thread Series UN CMLP Thread Quantity PER Inch 12 CQFM Hardness Rating 28.0 rockwell C minimum and 33.0 rockwell C maximum CQJX Nominal Thread Size 3.500 inches CRTM Bearing Surface Type FLAT MATT Material Steel overall STYL Style Designator 17C solid, plain, no outside flanges C7D10 10326