STAINLESS STEEL LANFRANCO LOCKING NUTS

LanFranco Locking Nuts

LanFranco is a French manufacturer specialising in all-metal self-locking nuts, supplied through PTS as the LanFranco ESL Locking Nuts range. Unlike a standard nut fitted with a nylon insert, an all-metal locking nut achieves its locking action through the metal components alone, making it suited to applications where a plastic insert would be unsuitable or where an all-metal, higher-temperature fixing is specified.

Materials
LanFranco ESL Locking Nuts are all-metal, with no plastic or nylon insert component.

FAQs
How does an all-metal locking nut avoid needing a nylon insert?
All-metal self-locking nuts typically achieve their locking action through mechanical means built into the metal itself — such as controlled deformation of the thread form, an elliptical thread section, or an engineered friction-collar effect against the mating bolt thread — rather than relying on a plastic insert to grip the thread. The LanFranco ESL design follows this same general principle, achieving its prevailing-torque lock through the nut's metal construction rather than any separate insert.

When would you choose an all-metal locking nut over a nylon insert nut?
An all-metal locking nut is generally the better choice where a nylon insert nut would be unsuitable — for example at higher operating temperatures than nylon can tolerate, in environments with chemical exposure that could degrade a plastic insert, or in applications where the nut needs to be removed and reused repeatedly without the locking performance wearing away.