The U.S. aircraft register, updated daily
Parts

Threaded Retainer

No failure report names the threaded retainer. 4 FAA approvals let 1 company make a replacement threaded retainer, Duncan Aviation INC holding the most (4).

Approved replacement parts 4 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a threaded retainer and sell it as an approved part for the models named. These are the companies holding such approvals for a threaded retainer:

For these models most: Cessna 750 Citation X (4).

MakerPartReplacesFitsGrantedStatus
Duncan Aviation INCThreaded Retainer 100308036-2.0.6Modification PartCessna 7502011-05-03current
Duncan Aviation INCThreaded Retainer 100308036-1.0.5Modification PartCessna 7502011-05-03current
Duncan Aviation INCThreaded Retainer 100308036-1.0.6Modification PartCessna 7502011-05-03current
Duncan Aviation INCThreaded Retainer 100308036-2.0.5Modification PartCessna 7502011-05-03current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.