Octagonal shaped; approx. 3.500 in. Across flats; approx. 0.500 in. High; has center hole plus 8 holes around center hole, 1 per flat side with nuts embedded in them; also has 8 slots from corners inward
NSN 5985-01-391-4753
NSN 5945-01-157-9486
NSN 5905-01-339-5918
NSN 5895-01-292-5807
NSN 5999-01-631-4843
NSN 6150-00-232-6568
NSN 5996-01-435-1093
NSN 6135-01-433-2062
NSN 5998-01-439-4074
NSN 5905-01-208-1568
NSN 6610-01-095-7219
NSN 5935-01-262-1100