O.S. Engine OS74003540 M5 Stand-off Mount 25.4mm (1')  [OS74003540]

Precision M5 Stand-off 25.4mm

The O.S. Engine OS74003540 M5 stand-off is a compact spacer measuring 25.4mm (1') designed for M5-threaded engine mount points on RC models. It establishes clearance between the engine and nearby parts to assist with alignment and tidy packaging inside the chassis.

Installation is simple: pair the stand-off with M5 bolts or nuts and tighten to fix the engine or mounting flange at the required offset. Apply thread-lock to metal-to-metal fasteners where appropriate and confirm alignment before final torque to avoid driveline misalignment.

During setup, standoffs like this let you adjust engine position to improve drive line alignment, cooling airflow, and to clear fittings such as fuel lines or muffler hardware. When swapping or adding stand-offs, match the M5 thread and the 25.4mm length for consistent results.

Choose this stand-off when you need a fixed 25.4mm offset using M5 hardware, and double-check thread engagement and clearance before final installation.