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Engineering fits are generally used as part of geometric dimensioning and tolerancing when a part or assembly is designed. In engineering terms, the "fit" is the clearance between two mating parts, and the size of this clearance determines whether the parts can, at one end of the spectrum, move or rotate independently from each other or, at the other end, are temporarily or permanently joined.
There are three main types of fit: Clearance Fit: a fit between mating parts with positive space in-between. Parts will freely move between each other. Transition Fit: a fit between mating parts between the clearance and interference fit. Parts fit together easily enough so that force isn't required, but will still hold together on it's own.
Fit The fit of a commodity is defined by its ability to physically interface or connect with or become an integral part of another commodity. For software, the fit is defined by its ability to interface or connect with a defense article. Function The function of a commodity is the action or actions it is designed to perform. For software, the ...
A business using a part will often use a different part number than the various manufacturers of that part do. This is especially common for catalog hardware, because the same or similar part design (say, a screw with a certain standard thread, of a certain length) might be made by many corporations (as opposed to unique part designs, made by only one or a few).
Vendors supplying parts to the Department of Defense are required to supply parts with UID Data Matrix Symbols conforming to MIL-STD 130M standard. By using a Data Matrix Symbol laser etching system to engrave a UID onto each part, items can be uniquely identified by manufacturer, part number and serial number.
The FAA's FAQ on Part 21 stated that PMA quality systems would be evaluated for compliance by the FAA during certificate management activity after the compliance date of the rule. [23] Today, all FAA production approvals – whether for complete aircraft or for piece parts – rely on a common set of quality assurance system elements.
Usually, an electronic parts catalogue enables the user to virtually disassemble the product into its components to identify the required part(s). In the automotive industry , electronic parts catalogues are also able to access specific vehicle information, usually through an online look-up of the vehicle identification number .
A catalog number is an identification number assigned to a purchasable product by an organization which sells goods. It is similar to the concept of a stock keeping unit [1] [irrelevant citation] It is sometimes overlapping but typically distinct from the concept of a part number.