The U.S. aircraft register, updated daily
Parts

Pin Collar

No failure report names the pin collar. 2 FAA approvals let 2 companies make a replacement pin collar, Triumph Actuation Systems - Connecticut holding the most (1).

Approved replacement parts 2 parts manufacturer approvals

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

For these models most: Saab Aircraft Ab SAAB 2000 (1), Boeing 727 (1).

MakerPartReplacesFitsGrantedStatus
Triumph Actuation Systems - ConnecticutPin Collar 4281205-1RSaab PN 9303956-001SAAB Saab 20002018-05-20current
Gemini EngineeringPin Collar Retaining Nose Gear G66-11765Boeing 66-11765Boeing 7271992-12-31current

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.