LanFranco locking nuts: all-metal vibration resistance

All-metal self-locking nuts

LanFranco ESL nuts lock with an all-metal prevailing-torque action rather than a nylon insert — so they resist loosening from vibration and keep working at temperatures that would soften a nylon-insert nut.

How the locking action works

Part of the nut body is precisely deformed so that it grips the male thread as it’s run down. That grip — the prevailing torque — is what stops the nut backing off under vibration, independent of how tightly the joint is clamped.

Reusable and temperature-stable

Because the locking feature is the metal itself, the nuts can typically be removed and refitted several times while retaining performance, and they stay effective across a far wider temperature range than nylon-insert types.

Where they’re used

• Vibration-prone assemblies — machinery, vehicles, rotating equipment.
• High-temperature joints — where nylon inserts would fail.
• Maintenance-friendly builds — where nuts are removed and refitted.