These high quality exhaust studs are produced from cad plated steel in 5/16 x 18 standard thread size and length is 1.5" and are a direct replacement for the Lycoming part number 31C12 stud. These studs DO NOT feature a safety wire hole (refer to p/n 08-06780 for safety wire hole feature). FAA approved for all Lycoming engines from 0-235 through 0-540. |
Perfect fit for my Lyc io-320
Lycoming Stud 31C-12
Lycoming Stud 31C-12
Lycoming Stud 31C-12
Lycoming Stud 31C-12
What a stud
Lycoming Stud 31C-12
Just what I needed and received it earlier than expected. Thanks
Lycoming Stud 31C-12
Lycoming Stud 31C-12
Great quality.
Lycoming Stud 31C-12
No question on the high quality of this stud. Although when I installed, some studs were too short to install washers. I wish they offered a stud 0.24 longer.
These bolts had a different thread pitch on each side. One as advertised and called out in the parts manual for the part number and the other side was completely different. Unusable for my alternator installation in lycoming O320 e2a.
Lycoming Stud 31C-12
Please note, Aircraft Spruce Canada's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce Canada assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
Approx 0.26 lbs.
Yes, 5/16-18 on both ends.