Heli-Coil R1185-4 1/4-20 wire refill inserts
Check compatibility
R1185-4 is the 1/4-20 refill for a compatible Heli-Coil system. The maker lists a 0.375-inch installed length, which should be checked against the available hole depth.
Questions before ordering
Does this refill come with installation tooling?
The manufacturer lists R1185-4 as packaged replacement inserts. If you need the system tools, compare the corresponding 5521-4 kit.