No. 10-32 size designation internal thd by 5/16-18 size designation external thd insert screw thd
A locking device which is serrated on the inside and outside diameters. It may have outer serrations omitted on one or two sides for close edge installation. The inner serrations engage the mating serrations of bolts, inserts, nuts, studs or similar items to be locked in place. The outer serrations broach their way into parent material when driven or pressed into place.
NSN 4140-00-732-5444
NSN 5910-01-641-7603
NSN 6645-00-003-5945
NSN 5905-00-580-1748
NSN 6685-01-657-4104
NSN 5905-00-688-4573
NSN 5930-00-675-7688
NSN 6220-01-159-9080
NSN 5945-01-197-0340
NSN 6105-01-328-8695
NSN 5905-01-331-8372
NSN 6645-01-054-3969