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Revision B
Chapter 2:
Product Overview
The product overview provides the dimensions, details, and performance criteria for the various sizes and configurations.
2.1
Definitions
The following terms, abbreviations, and acronyms are used in this manual.
Term
Definition
API
American Petroleum Institute
ASTM
American Society of Testing and Materials
Bolt
A headed and externally threaded fastener designed to be paired with a nut
Center-link
A hydraulic cylinder or manually adjustable turnbuckle type connection between the
header and the vehicle, which is used to change the angle of the header relative to the
vehicle
CGVW
Combined gross vehicle weight
DK
Double knife
DKD
Double-knife drive
Export header
The header configuration typical outside North America
FFFT
Flats from finger tight
Finger tight
Finger tight is a reference position in which the given sealing surfaces or components are
making contact with each other and the fitting has been tightened by hand to a point
where the fitting is no longer loose and cannot be tightened further by hand
GVW
Gross vehicle weight
Hard joint
A joint made with use of a fastener where joining materials are highly incompressible
Header
A machine that cuts crop and feeds it into an attached combine
Hex key
A tool of hexagonal cross-section used to drive bolts and screws that have a hexagonal
socket in the head (internal-wrenching hexagon drive); also known as an Allen key
ISC
Intermediate Speed Control
JIC
Joint Industrial Council: A standards body that developed standard sizing and shape for
original 37° flared fitting
n/a
Not applicable
North American header
The header configuration typical in North America
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
Nut
An internally threaded fastener designed to be paired with a bolt
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 ORS, which stands for O-Ring Seal
SAE
Society of Automotive Engineers
Screw
A headed and externally threaded fastener that threads into preformed threads or forms
its own thread when inserted into a mating part
Soft joint
A flexible joint made by use of a fastener in which the joining materials compress or relax
over a period of time
Tension
An axial load placed on a bolt or screw, usually measured in Newtons (N) or pounds (lb.).
This term can also be used to describe the force a belt exerts on a pulley or sprocket
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