fren...pt
Paris
Paris
Bourges
+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
Ceritifié
ISO 9001 since 1998

SRF

SRF – HFR FLANGE NUT
ALL METALS

THE PRINCIPLE

SRF DEFORMED NUT

The principle of self-locking of the SRF flange nut is obtained by making calibrated markings on the top of the nut under a specific load deforming the last thread(s) of the nut.

During the assembly, the screw generates pressure on the deformed thread of the nut creating a constant braking torque and independent (called self-locking) of the tightening torque of the latter.

The SRF nut has a flat base providing an enlarged support surface with the support part to improve the distribution of forces and reduce the contact pressure. With an SRF nut, it is not necessary to affix a flat washer under the nut.

Product description

Definition: all metals self-locking hexagon flange nut locking by deformation of the last threads given by recessions at the top of the nut 
Threading: standard to ISO 965-2
Characteristic and performance test: for steel ISO 898-2/ISO 2320-
for stainless steel ISO 3506-2/NF E 25-035-2
Manufacturing range: metric/inch, all diameters, coarse & fine pitch, special heights & A/F upon request