214658 147 Revision A
7 Reference
7.1 Definitions
The following definitions and acronyms may be used in this manual:
Term
Definition
API American Petroleum Institute
ASTM American Society of Testing and Materials
Bolt
A headed and externally threaded fastener that is designed to be paired with a nut
CGVW Combined gross vehicle weight
Finger tight
Finger tight is a reference position where sealing surfaces or components are
making contact with each other and the fitting has been tightened to a point where
the fitting is no longer loose.
F.F.F.T.
Flats from finger tight
GVW Gross vehicle weight
hp Horsepower
JIC
Joint Industrial Council: A standards body that developed the standard sizing and
shape for original 37° flared fitting.
n/a
Not applicable
Nut
An internally threaded fastener that is designed to be paired with a bolt
NPT
National Pipe Thread: A style of fitting used for low pressure port openings, threads
on NPT fittings are uniquely tapered for an interference fit.
ORB
O-ring boss: A style of fitting commonly used in port openings on manifolds, pumps,
and motors.
ORFS
O-ring face seal: A style of fitting commonly used for connecting hoses and tubes.
This style of fitting is also commonly called an O-ring seal (ORS).
Pick-Up Header
A machine that attaches to a combine and picks up grain that has been cut and laid
in windrows.
PTO Power take-off
RoHS (Reduction of
Hazardous Substances)
A directive by the European Union to restrict the use of certain hazardous
substances (such as hexavalent chromium used in some yellow zinc platings)
SAE Society of Automotive Engineers
Screw
A headed and externally threaded fastener that threads into preformed threads or
forms its own thread in one of the mating parts.
Soft joint
A joint made with the use of a fastener where the joining materials are compressible
or experience relaxation over a period of time.
spm
Strokes per minute
Tension
Axial load placed on a bolt or screw, usually measured in Newtons (N) or
pounds (lb.).
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