A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5965-00-247-4886
NSN 5996-01-167-8914
NSN 5990-00-924-4167
NSN 6685-01-230-3907
NSN 5990-00-056-9775
NSN 5975-01-480-7913
NSN 6145-00-942-0981
NSN 5855-01-213-9076
NSN 5998-01-165-9393
NSN 6130-01-559-7660
NSN 5960-01-117-1887
NSN 6240-01-574-7480