+33 (0)1 40 04 92 30 Lun - Jeu 7h30 - 17h30 / Ven 7h30 - 16h 37, Avenue de Saint-Mandé 75012 PARIS
+33 (0)2 48 50 18 10 Lun - Jeu 8h - 17h / Ven 8h - 16h Rue du Minerai 18570 La Chapelle-Saint-Ursin
ISO 9001 since 1998


The Problem

In the petrochemical industry, compressors cannot fail at any time. For many years, J. Lanfranco nuts have been chosen by the most demanding companies in the compressor sector: Hoerbiger, CPI, KSB, Burckard…

The solution

After several tests and evaluations, ESL nuts have been approved for fixing flat valves:

  • A single and unique piece, the ESL nut does not require specific knowledge or special tools
  • A nut with a tightening torque completely independent of any load
  • 100% perpendicularity possible if necessary
  • Constant tightening torque to achieve the correct bolt tension in all installations

The benefits

The benefits of our ESL nut for our customers were immediate:

  • No seizing and a constant coefficient friction for stainless steel with a cost-effective, unique and permanent solution based on tin

About us

Founded in 1974, J. Lanfranco & Cie specializes in the manufacture of high-end self-braked nuts and safety fasteners. ESL and ERM have been on the market for more than 40 years, in the most extreme conditions.