Jazrider M4-LNF-DB 4mm Blue Flanged Lock Nuts (4 pcs) - practical replacement hardware  [M4-LNF-DB]

Practical overview of Jazrider 4mm flanged lock nuts

These Jazrider 4mm flanged lock nuts in blue are intended as service hardware for common RC applications. They offer a flanged seating area to spread clamping load and a locking profile to reduce the likelihood of components working loose during normal running.

Uses and fitment guidance

Use these lock nuts where a 4mm nut is required, including body posts, linkages and small mounting brackets. The flange helps protect mounting surfaces and improves contact stability on plastic and thin metal parts.

Service notes for hobbyists

Install with standard hand tools and check torque as part of routine maintenance. The blue finish assists quick identification during teardown; inspect threads and replace units that show deformation or thread damage.