We've found that for large and small needs alike, it's important to be equipped with an excellent understanding of the hinge terminology associated with industrial type hinges.

Gauge · The thickness of a hinge leaf.	Pin · Rod running the length of the hinge. The pin holds the leaves of the hinge together.
Knuckle Length · The nominal or typical dimension of the knuckle measured parallel to the pin.	Knuckle · The hollow circular part at the joint of a hinge through which a pin is passed. The knuckle is often called a loop, joint, node or curl.
Hinge Length · The length of the leaves measured parallel to the pin.	Hinge Width · The overall dimension of the leaves measured perpendicular to, or across, the pin. (same as open width).
End Play · The amount of axial movement between the leaves.	Pitch · The dimension from a point on the knuckle to the same point on an adjacent knuckle on the same leaf.
Leaf · The portion of a hinge extending laterally from the knuckle and which usually revolves around a pin.	Leaf Width · The dimension from the center of the pin to the outer edge of the leaf.

Paint Clearance · The minimum dimension between the outer face of the knuckle and the opposing edge of the cutout over the hinge's entire range of pivotal movement.
Plain or Standard Assembly · This is a surface-type hinge. The leaves lie flat in the same plane when in the open position. Unless otherwise indicated, this type of hinge will be furnished.
Swaging · The forming of one or both leaves toward or beyond the center of the pin, swaging slightly increases leaf width.
Both Leaves Half-Swaged · Both leaves are swaged approximately one-half the pin diameter with a minimum clearance between leaves when parallel.
One Leaf Half-Swaged · One leaf swaged one half the pin diameter.
One Leaf Full-Swaged · One leaf swaged equal to the pin diameter and both leaves parallel when in a closed position.
Reverse Swaged · One leaf swaged to simulate reverse assembly. Leaves will not close to a parallel position.
Offset · Forming one or both leaves away from the center of the pin. Offsetting slightly decreases leaf width.
Stop Hinge · A hinge manufactured to limit the travel of the leaves to a specified angle. Inside Stop Hinge Leaves will open from a closed position, leaves parallel to each other, to a stop angle as specified.
Outside Stop Hinge · Leaves move from an open or flat position and stop at a specified angle.