Part Number
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This article includes a, but its sources remain unclear because it has insufficient. Please help to this article by more precise citations. (September 2011) A part number (often abbreviated PN, P/N, part no., or part #) is an of a particular part design used in a particular industry. Its purpose is to simplify reference to that part. A part number unambiguously identifies a part design within a single corporation, and sometimes across several corporations.
Part Number Cross Reference
It refers below For example, when specifying a, it is easier to refer to 'HSC0424PP' than saying 'Hardware, screw, machine, 4-40, 3/4' long, pan head, Phillips'. In this example, 'HSC0424PP' is the part number, and it may be prefixed in database fields as 'PN HSC0424PP' or 'P/N HSC0424PP'. Contents. The part design versus instantiations of it As a part number is an identifier of a part design (independent of its ), a is a of a particular instantiation of that part design.
In other words, a part number identifies any particular (physical) part as being made to that one unique design; a serial number, when used, identifies a particular (physical) part (one physical instance), as differentiated from the next unit that was stamped, machined, or extruded right after it. This distinction is not always clear, as blurs it by typically referring to both part designs, and particular instantiations of those designs, by the same word, 'part(s)'. Thus if you buy a of P/N 12345 today, and another muffler of P/N 12345 next Tuesday, you have bought 'two copies of the same part', or 'two parts', depending on the implied.
User part numbers versus manufacturing part numbers (MPN) A using a part will often use a different part number than the various 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). For example, when referring to a 'Hardware, screw, machine, 4-40, 3/4' long, Phillips':. Manufacturer A uses part number '4-40-3/4'-pan-phil',. Manufacturer B uses part number '100-440-0.750-3434-A'. Manufacturer C uses part number 'TSR-1002'. The business using such a screw may buy screws from any of those manufacturers, because each supplier manufactures the parts to the same specification.
To identify such screws, the user doesn't want to use any of those manufacturer's part numbers, because. it would imply that one manufacturer is acceptable and the other ones aren't, and,.
it wishes to use a consistent for the part numbers of all of the parts it uses. Therefore, the user devises its own part numbering system. In such a system, the user may use the part number 'HSC0424PP' for that screw. There are also some national and industry-association initiatives which help producers and consumers codify the product based on a unified scheme to establish a common language between industrial and commercial sectors. For example:.
Ford Part Number Lookup
The Iranian national classification and codification system known as is a 16 digit code to codify the products in a nationally unified manner. Government, and most especially its Department of Defense, has standardized various part numbering systems over the decades for it and its suppliers to use, such as the AN (Army-Navy) and MS (Military Standard) hardware classification and numbering systems. The maintains the NAS system (National Aerospace Standards), which is gradually replacing the AN and MS systems. Significant versus non-significant part numbers In general, there are two types of part numbering systems: significant (a.k.a.
'intelligent') and non-significant (a.k.a. In a significant part numbering system, the part numbers are assigned intelligently, according to an, and thus they give an indication of salient characteristics of the component. For example, a screw may have the part number 'HSC0424PP'; in this case, the letters indicate characteristics of the component:. H = 'Hardware'. S = 'Machine Screw'. C0424 = '4-40, 3/4' long'.
PP = 'Panhead Phillips'. In a non-significant part numbering system, part numbers are assigned in some other fashion, such as sequentially or arbitrarily. For example, a screw may have the part number '1002', which may not tell the user anything about its thread size, length of shank,. Significant part numbering systems are easier to use if you are trying to identify an item though the use of its code inside your company rather than a long description; however, many variations can start to appear when the code is used by other companies, which may be your distributors, and then people can become confused.
Non-significant part numbers are easier to assign and manage. You can still create a structure where you can have a category and then a sequential number e.g. 231-1002 (2=Hardware 3=Screw 1=Phillips then the unique number 1002) This is also more efficient for data entry where using numbers and dashes are part of a normal keypad which means you don't have to use both hands on a keyboard. One other bonus is that people usually understand numbers easier, and when you store products in a warehouse, you can put items in numerical order (for example, lower numbers at one end of an aisle, and as you continue, the numbers increase).
Dash numbers There is a strong tradition in part numbering practice, in use across many corporations, to use suffixes consisting of a 'dash' followed by a number comprising 1 or 2 digits (occasionally more). These suffixes are called dash numbers, and they are a common way of logically associating a set of detail parts or subassemblies that belong to a common assembly or part family. For example, the part numbers 12345-1, 12345-2, and 12345-3 are three different dash numbers of the same part family. In precise and terms, it is actually a, not a, that is usually used; but the word 'dash' is firmly established in the spoken and written usage of the engineering and manufacturing professions; 'dash number', not 'hyphen number', is the standard term. This comes from the era before computers, when most typographical laypeople did not need to differentiate the or precisely.
Some companies follow a convention of circling the dash numbers on a drawing, such as in view designators and subpart callouts. Relationship of part numbers to drawing numbers Another widespread tradition is using the drawing number as the root (or stem) of the part number; in this tradition, the various dash-number parts usually appear as views on the self-same drawing.
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For example, drawing number 12345 may show an assembly, P/N 12345-1, which comprises detail parts -2 ('dash two'), -3, -4, -8, and -11. Even drawings for which there is currently only one part definition existing will often designate that part with a part number comprising drawing number plus -1 ('dash one').
This is to provide of the part numbering system, in anticipation of a day when it might be desired to add another part definition to the family, which can then become -2 ('dash two'), followed by -3 ('dash three'), and so on. Some corporations make no attempt to encode part numbers and drawing numbers with common encoding; they are paired arbitrarily. Parametric families of parts, and tabulations of part numbers with parameter values Often more than one version of a part design will be specified on one drawing. This allows for easy updating of one drawing that covers a family of parts, and it keeps the specifications for similar parts on one drawing.