O.S. Engine OS79871555 M5x55 Hex Socket Cap Screw Pack of 10  [OS79871555]

M5x55 screw build and typical applications

The O.S. Engine OS79871555 set is a 10-piece pack of M5x55 hexagon socket head cap screws intended for RC-scale fastening tasks. The hex socket head is designed to be driven with a matching hex key for controlled tightening in compact mounting areas.

Installation notes: engage the hex key fully, tighten with steady pressure and avoid excessive torque to prevent thread damage. For longevity in high-vibration locations, inspect thread engagement regularly and consider using a medium-strength threadlocker where frequent access is not required.

Service and setup: these fasteners are used to fix engine mounts, motor supports and gearbox fixtures; using consistent screw length and head type simplifies maintenance and helps maintain alignment when tuning the model.