One of the greatest unknowns to the general public is that Caterpillar invented a
Four Spiral Hose in 1966 and supplied many of the major hose suppliers such as Gates,
Parker, and Weatherhead with hose up until the 1990’s.
XT-3 Style Caterpillar Coupling This is technically a reuseable fitting,however it
could also be considered a press on fitting as well. This fitting is still used today
by Caterpillar. Patent # 3,325,194 A
Four Spiral Hose,Sae 100R10, which was later changed to Sae 100r12. Caterpillar still
produces this hose today in Illinois. It is used for the XT-3 version coupling. Hose
assemblies with crimp style Cat fittings are made with fittings from Anchor Coupling
and hose from Rapisarda. Both companies are owned by Caterpillar.