These high quality exhaust studs are made of cadmium plated steel, with a standard 5/16 x 18 thread and a length of 1.5". They are a direct replacement for Lycoming stud part number 31C12. They do not have a safety wire hole. FAA approved for all Lycoming engines from 0-235 to 0-540.
These high quality exhaust studs are made of cadmium plated steel, with a standard 5/16 x 18 thread and a length of 1.5". They are a direct replacement for Lycoming stud part number 31C12. They do not have a safety wire hole. FAA approved for all Lycoming engines from 0-235 to 0-540.