SAE AS 6416-2017 Bolts Screws Studs and Nuts Definitions for Design Testing and Procurement.pdf

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4、70 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AS6416 AEROSPACE STANDARD AS6416 Issued 2017-04 Bolts, Screws, Studs, and Nuts, Definitions fo

5、r Design, Testing and Procurement RATIONALE This document establishes basic terms and definitions applicable to procurement requirements for fasteners (bolts, screws, studs, nuts, and other threaded parts). 1. SCOPE This SAE Aerospace Standard provides definitions for terms and requirements used in

6、SAE AS procurement specifications for fasteners (bolts, screws, studs, nuts, and other threaded parts). 2. REFERENCES There are no referenced publications specified herein. 3. DEFINITIONS BURR: A rough edge or ridge left on the metal due to cutting, grinding, piercing, or blanking operation. See als

7、o TIGHT BURR. COLD ROLLING (or COLD WORKING): Forming material below the recrystallation temperature. CRACK: Rupture in the material which may extend in any direction and which may be intercrystalline or transcrystalline in character. DEFECT: Any non-conformance of the unit or the product with speci

8、fied requirements. DEFECTIVE: A unit of the product which contains one or more defects. DISCONTINUITY: An interruption in the normal physical structure or configuration of a part such as a lap, seam, inclusion, crack, machining tear, or stringer. FINISHED PART: A part ready for use, inclusive of any

9、 possible treatments and/or surface coatings, as specified on the part drawing. HEAT PATTERN: A discernible difference in etched appearance between the head and the shank caused by plastic forming of the head. SAE INTERNATIONAL AS6416 Page 2 of 2 INCLUSION: Non-metallic particles originating from th

10、e material making process. They may exist as discrete particles or strings of particles extending longitudinally. LAP: Surface imperfection caused by folding over metal fins or sharp corners and then rolling or forging them into the surface. See part drawing or procurement specification for allowabl

11、e lap depth and minimum condition for rateable laps. MACHINING TEAR: A pattern of short jagged individual cracks, generally at right angles to the direction of machining, frequently the result of improperly set cutting tools, or dull cutting tools. NON-CONFORMANCE: A departure from a specified requi

12、rement for any characteristic. NON-CONFORMING UNIT: A unit of the product that has one or more non-conformances. PART DRAWING (OR PART STANDARD): Document specifying all the requirements for the part, i.e., metallurgical, geometrical and dimensional, mechanical properties and testing, ND inspection,

13、 etc. PRODUCTION INSPECTION LOT: All finished parts of the same part number, made from a single heat of alloy, heat treated at the same time to the same specified condition, produced as one continuous run, and submitted for manufacturers inspection at the same time. ROOM TEMPERATURE: Ambient tempera

14、ture (approximately 68 F). SEAM: Longitudinal surface imperfection in the form of an unwelded, open fold in the material. SIMPLE RANDOM SAMPLING: The taking of n items from a population of N items in such a way that all possible combinations of n items have the same probability of being chosen. STRI

15、NGER: A solid non-metallic impurity in the metal bar, often the result of an inclusion that has been extended during the rolling process. TIGHT BURR: A burr closely compacted and binding in the periphery of a part without loose ends and is within the dimensional limits of the part. 4. NOTES 4.1 Revi

16、sion Indicator A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY SAE COMMITTEE E-25, GENERAL STANDARDS FOR AEROSPACE AND PROPULSION SYSTEMS