![]() The intelligence behind defining AQLs is in figuring out how much error is tolerable given the costs that would be incurred by any efforts to further reduce its incidence.Īn abbreviation used in parts lists (PLs, LMs, BoMs) in the quantity-per-assembly field when a discrete count is not applicable. It is trivial to say that no one wants any error, and that everyone wants uniform perfection but in the real world, it almost never happens. The threshold of defectiveness that is allowable in a group of parts. (See also MS- and NAS.)Īnd the many standards that it issues, for example, ANSI Z87.1. DOD and military to do less of it (as explained at United States Military Standard > Origins and evolution), although many MIL standards are still current. Today industry and ISO also do a lot of this standardization specification, freeing the U.S. Army and Navy were leading the way on product standardization for logistics improvement, yielding the United States Military Standards system. Came from the era of circa 1890s-1945, when the U.S. Standards in materials science and engineering maintained by SAE International and widely used in the aerospace manufacturing industries.Ī prefix for standard hardware (catalog hardware) ID numbers. The SAE steel grade system was formerly a joint AISI-SAE system. The AISI acronym is commonly seen as a prefix to steel grades, for example, "AISI 4140". Many corporations have such standards, which define some terms and symbols specific to them on the national and international level, ASME standard Y14.38 is probably the most widely used.Ĭommonly used when measuring the corners of a hex drive, such as a hex nut.Ĭommonly used when measuring the flat surfaces of a hex drive, such as a hex nut. Technical standards exist to provide glossaries of abbreviations, acronyms, and symbols that may be found on engineering drawings. This list includes abbreviations common to the vocabulary of people who work with engineering drawings in the manufacture and inspection of parts and assemblies. Engineering drawing abbreviations and symbols are used to communicate and detail the characteristics of an engineering drawing. ![]()
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