An intentional clearance between internal or external thread and the design form of the thread when the thread form is on it's maximum metal condition. Not all classes of fit have an allowance. For metric threads the allowance is called the fundamental deviation.

(n) A tolerancing measure used to describe the minimum clearance or maximum interference between parts. Allowance is the tightest fit between two mating parts.

An allowance is an intentional difference between the maximum material limits of mating parts. It is the minimum clearance (positive allowance) or maximum interference (negative allowance) between such parts.

The prescribed difference in dimensions of mating parts to provide a certain class of fit.

A time increment included in the standard time for an operation to compensate the worker for production lost due to fatigue and normally expected interruptions, such as personal and unavoidable delays.

In a foundry, the clearance specified; difference in limiting sizes, as minimum clearance or maximum interference between mating parts, as computed arithmetically.

1) In work measurement, a time value or percentage of time by which the normal time is increased, or the amount of nonproductive time applied, to compensate for justifiable causes or policy requirements that necessitate performance time not directly measured for each element or task. Usually includes irregular elements, incentive opportunity on machine-controlled time, minor unavoidable delays, rest time to overcome fatigue, and time for personal needs. 2) In assembly, the minimum clearance or maximum interference distance between two adjacent objects.