The U.S. aircraft register, updated daily
Parts

Engine Stud

No failure report names the engine stud. 2 FAA approvals let 1 company make a replacement engine stud, Rainbow International holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

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

MakerPartReplacesFitsGrantedStatus
Rainbow InternationalEngine stud 09-001Teledyne Continental Motors 401-893, 401-852, 401-804Teledyne Continental Motors O-470 Series, B, G2010-05-23current
Rainbow InternationalEngine stud 09-002Teledyne Continental Motors 402-151Teledyne Continental Motors C-75 Series, 8, 8F2010-05-23current

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.