Time-Sert 18121 M8×1.25 11.7 mm refill inserts

Check compatibility
Time-Sert 18121 is an 11.7 mm refill for M8×1.25. The ten-pack listing identifies the 1812 installation system. Compare insert depth against the application.
Questions before ordering
What does 11.7 mm measure?
It is the insert length, separate from the M8×1.25 fastener designation. Confirm the hole depth and the 1812 installation system.