21953 Self-Locking Front Retainer

The Hutchinson 21953 series front retainers are the same part as MS14108-3 and MS14108-4 and M85731-3* and M85731-4* retainers with and without the Hutchinson Clevis as part of the assembly. Hutchinson 21953 series with clevis is the same as Boeing HS4897 series with clevis. See part numbers 21953-3 and 21953-4.
*MS14108 and MIL-F-85731 items identified by the same size and suffix characteristics are universally, functionally and dimensionally interchangeable. (Per note F in MS14108.)