These thread inserts are made of stainless steel, and work great with the W86910 thread repair kit.
M14-1.25 thread inserts
Use with drill bit size 9/16 in. (14.5 mm)
Includes: (6) 503 Stainless steel inserts
Lengths: 5/16, 7/16, and 5/8 in.
Designed for use with tapered or gasket seated spark plugs
Recommended to use with W86910 thread repair kit for proper tap and insert tools



