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Hinge Terminology

A. LEAF WIDTH – the dimension from the center of the pin to the outer edge of the leaf.

B. KNUCKLE LENGTH – the nominal or typical dimension of the knuckle measured parallel to the pin.

C. HINGE LENGTH – the length of the leaves measured parallel to the pin.

D. HINGE WIDTH – the overall dimension of the leaves measured across the knuckle.

E. END PLAY – the amount of axial movement between the leaves.

F. PITCH – the dimension from a point on the knuckle to the same point on an adjacent knuckle on the same leaf.

G. PAINT CLEARANCE – the minimum dimension between the outer face of the knuckle and the opposing edge of the leaf cut out over the entire range of pivotal movement of the hinge.

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