Bolt

Engines most often reporting it

Approved replacement parts 12,535 parts manufacturer approvals

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

For these models most: Boeing 747 (4,351), Boeing 737 (2,658), Boeing 777 (1,889), Boeing 767 (1,755), Boeing 757 (1,674), Boeing 707 (743), Boeing 727 (454), Sikorsky S-61 (172), Mcdonnell Douglas MD-11 (165), Sikorsky SH-3 (115), Mcdonnell Douglas DC-10 (114), Sikorsky S-64 (108).

The first 150 of 400.