DUBO LOCKING AND SEALING RINGS
FOR THREADED FASTENERS - FROM CHALLENGE
sealing/locking rings from Challenge can be used on their own or
with a toothed collar ring for especially high loading applications, e.g.
when using 8.8 and 10.9 bolts. In addition to having the locking action of
a normal lock washer, the elastic distortion, which occurs when the
material is subjected to heavy pressure, creates considerable frictional
resistance. Dubo polyamide sealing/locking rings are available for
threaded fasteners from M2 to M52 and offer a cheap and simple solution
for Original Equipment Manufacturers and Installers to permanently retain
and seal threaded items.
shape of the ring is so designed that as the bolt is screwed home the
screw thread is gripped both along the internal circumference and in the
bolt hole. This brings into effect additional frictional forces, which
make it impossible for the ring to rotate around the bolt. Other features
resulting from the use of this plastics material are the elimination of
leakage, protection of the underlying surface, sound deadening, isolation
and corrosion resistance.
The Dubo system is applicable to all forms of hex nut or socket screw and the polyamide rings are resistant to all generally encountered chemicals, e.g. alkalis, petrol, sea water etc. They are complemented by the Korrex range of insulating bushes and nut caps.