1、- 3 DOD-S-63275A 53 7777706 0307086 5 beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, US Army Armament Research and Development Command, ATTN: DRDAR-TST-S, Dover, NJ 07801 by using th
2、e self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. DOD- S- 6 3 2 7 5 A 29 October 1982 SUPERSEDING DOD-S-63275 26 September 1977 MILITARY SPECIFICATION STUD, SCREW THREAD, LOCKED IN, RING LOCKED, SERRATED, METRIC AND RING
3、, LOCK, SERRATED, METRIC, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers metric locked in studs. The method of locking in the stud is.by means of a serrated collar and an acc
4、essory lockring with matching serrations installed within the parent material to prevent rota- t ion. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. Unless otherwise specified, t the following specifications, standards, and handbooks of the issue li
5、sted in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL QQ-A-22516 - QQ-A-250/6 - QQ-P-416 - PPP-H-1581 - Aluminum Alloy Bar, Rod, and Wire,
6、Rolled, Drawn or Cold Aluminum Alloy 5083, Plate and Sheet Plating, Cadmium (Electrodeposited) Hardware (Fasteners and Related Items), Packaging of Finished, 2024 - FSC 5307 7. (jb Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I DOD-S-63275A 53 777
7、7706 0107087 7 = DOD-S-632 75A MILITARY MIL-1-6866 - Inspection, Penetrant Method of MIL-1-6868 - Inspection Process, Magnetic Particle MIL-Hy6875 - Heat Treatment of Steels (Aircraft Practice, Process for) MIL-A- 86 25 - Anodic Coatings, for Aluminum and Aluminum Alloys DOD-S-63275/1 - Stud, Screw
8、Thread, Locked In, Ring Locked, Serrated, Metric STANDARDS FEDERAL FED-STE-H28/20 - Inspection Methods for Acceptability of UN, UNR, UNJ, M and FED-STD-H28/21 - Screw Thread Standards for Federal Services, Section 21, MJ Screw - Threads Metric Screw Threads MILITARY MIL-STD-105 - Sampling Procedures
9、 and Tables for inspection by Attributes MIL-STD-1312 - Fasteners Test Methods (Copies of specifications, standards, handbooks, drawings, and publications re- quired by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by
10、the contracting officer.) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. The issues of the documents which are indicated as DOD adopted shall be the issue listed in the current DODISS and the supplement thereto, if applicable. AMERIC
11、AN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI B 46.1 - Surface Texture (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018.) AEROSPACE MATERIAL SPECIFICATIONS (AMs) AMs 5662 Alloy Bars, Forgings and Rings, Corrosion and Heat Resis
12、tant (718) AMs 6322 Steel, Alloy, Composition 8740 (Application for copies should be addressed th the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM A 380 - Cleaning and Descaling Stainless Steel Parts, Equ
13、ipment and Systems ASTM E 8 - Tension Testing of Metallic Materials (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) -1 2 * Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
14、om IHS-,-,-DOD-S-b3275A 53 W 7777706 0107088 7 DOD- S-6 3 2 75A (Industry association specifications and standards are generally available for reference from libraries. and using Federal agencies.) They are afso distributed among technical groups 2.3 Order of precedence. In the event of a conflict b
15、etween the text of this specification and the references other than Specification sheets cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as speci- fied herein and in accordance with the applicable
16、 specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Material. Recycled and reclaimed materials (see 3.1) shall be used to the maximum extent practicable. from the following materials as specified.
17、 The studs shall be a one piece all metal unit, made 3.2.1 Alloy steel. Alloy steel shall be composition 8740 (UNS G87400) in ac- cordance with AMs 6322. 3.2.2 Nickel base alloy. tant composition 718 (UNS N07718) in accordance with AMs 5662. Nickel base alloy shall be corrosion and heat resis- 3.3 T
18、reatment and finish. 3.3.1 Heat treatment. The stud shall be heat treated in accordance with the heat treatment process specified in MIL-H-6875. 3.3.2 Protective finish. The stud shall be furnished with a protective plating or surface treatment as specified herein. 3.3.2.1 Cadmium plate. with QQ-P-4
19、16, type II, class 3. me ter s). Alloy steel studs shall be cadmium plated in accordance The plating thickness shall be 5.1pm (micro- 3.3.2.2 Cleaning and descalinq. and descaled in accordance with ASTM A380. Corrosion resistant steel studs shall be cleaned 3.4 Design, dimensions and tolerances. Des
20、ign, dimensions, and tolerances shall conform to the requirements of the applicable specification sheet and shall apply after application of the protective plating or cleaning and descaling surface treatment. 3.4.1 Threads. Threads shall be right hand, M or MJ profile in accordance with FED STD H28/
21、21 and the applicable specification sheet. 3.4.1.1 Nut end threads. Nut end threads shall be M or MJ profile, tolerance class 4h for alloy steel and 4e for nickel base alloy as specified in the appli- cable specif ication sheet. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted
22、without license from IHS-,-,-DOD-S-63275A 53 W 7777706 OLO7OB7 O W “T END THREAD SIZE M!5 MlO M6 THRU M8 Ml2, Ml4 WD-S-63275A DEVIATION OF STUD FROM PLATE, MAX. (a PER lorn OF STUD NUT END LENGTH) 0.040 O. 030 O. 025 0.020 3.4.1.2 Stud end threads. Stud end threads shall be M profile, tolerance clas
23、s 3h4h as specified in the applicable specif icaton sheet. 3.4.1.3 Thread forming. formed after heat treatment. be formed prior to agng. surface treatment. rolling process. 1 Composition 8740 alloy steel stud threads shall be fully Composition 718 nickle base alloy stud threads shall Thread forming
24、shall be prior to protective plating or Tkeads for nut end and stud end shall be formed by a single 3.4.1.4 Incomplete threads. The runout threads shall be faired into the shank within a midmum of one and a maximum of two pitches without an abrupt change in cross sectional area. The root and flanks
25、of the runout thread may deviate from true thread form but shall be smooth and free of tool marks. Lead.thread shall not exceed two pitches. 3.4.1.5 Grain flow. thread contour with the maximum density at the bottom of the root radius as shown in figure 1. The grain flow in rolled threads shall follo
26、w the general Fiqure 1. Thread Grain Flow 3.4.2 Locking serrations. Locking serration dimensions shall conform in size to the applicable specification sheet part number and shall be of full form and free from burrs or other flaws. 3.4.3 Surface texture. the values stated in the applicable specificat
27、ion sheet and shall be in accord- ance with ANSI B46.1. The surface texture, prior to plating, shall not exceed 3.4.4 Straightness. specified in table I when tested in accordance with 4.6.5. The straightness of the stud shall be within the values TABLE I. Straightness Provided by IHSNot for ResaleNo
28、 reproduction or networking permitted without license from IHS-,-,- DOD-S-b3275A 53 W 7777906 Olt07070 7 Load Min Rating Tensile MPa Strength MPa 900 900 125 O 1250 WD- S-6 3 2 75A - Shear Min Engagement Area Proof (Stud End) MPa Numbers Numbers 630 TABLE V I TABLE V Strength -100 -200 1000 COL 1 CO
29、L 1 3.5 Mechanical properties. fied in the applicable specification sheet and having load ratings as specified Studs conforming to the design and dimensions speci- NOMINAL SIZE (NJT END) M5xO. 8 M6x1 M7x1 M8x1.25 M8x1 MlOxl. 5 MlOxl .25 Ml2x1.5 Ml2x1.25 in Table II s as shown in FED-STD-H28, APPENDI
30、X A5, 3. Strength Factors - 2/ The minimum axial loads shown are the applicable tensile stress areas multiplied by the appropriate load rating. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-S-63275A 53 W 7777706 OL07071 7.W 8.8 12.5 18.0 22.7
31、 24.4 36.1 38.2 55 .O 57.5 77.8 WD-S-63275A 14.0 19.8 28.5 26.1 38.8 57.3 60.6 87.2 91.3 123.0 3.5.2 Proof load. as specified in table IV when tested in accordance with 4.7.1. The stud shall be capable of withstanding proof loads TABLE W Proof Load For Studs (Nut End) NOMINAL SIZE (NUT END) M5XO. 8
32、M6X1 M7X1 M8X1.25 M8Xl MiOX1.5 MlOXl .25 Ml2Xl.5 Ml2X1.25 Ml4xl.5 TENSILE STRESS AREA .4. The stud shall meet the hardness as specified in the applicable DISCONTINUITY DEPTH MAX mm i/ 0.13 0.15 0.2 3.6 Metallurgical properties. 3.6.1 Discontinuities. The stud shall not exhibit discontinuities which
33、exceed the following limitations when tested in accordance with 4.8. 3.6.1.1 Cracks. (See 6.3.1) The stud shall be free of cracks in any direction or location. 3.6.1.2 Laps and seams. (See 6.3.2 and 6.3.3) The stud shall show no evidence of laps and seams as specified in 3.6.2. the values specified
34、in table VIII. Discontinuity depths shall not exceed TABLE VIII. Discontinuity Depth - i/ Depth of discontinuity shall be measured normal to the surface at a point of greatest penetration. 3.6.1.3 Inclusions. (See 6.4) The stud shall show no evidence of surface or subsurface inclusions at the thread
35、 root when examined in accordance with 4.8. 8 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-S-63275A 53 W 9999906 0109074 4 W DOD-S-63275A 3.6.2 Thread discontinuities. (Lap, seams, and surface irregularities in rolled threads). The stud shal
36、l show no evidence of laps at the root or along the flanks of the thread as shown in figure 2. permissible regardless of location. the thread above the pitch diameter on either the pressure or non-pressure side (one lap per thread) provided it extends toward the crest and generally parallel to the s
37、ide as shown in figure 3a. Crest craters, crest laps, or a crest lap in combination with a crest crater are permissible, provided the imperfection does not extend deeper than 20 percent of the basic thread height (See Table IX) as measured from the thread crest when the thread major diameter is at a
38、 minimum size (See Figure 3a). Slight deviation from the thread contour is permissible at the crest of the thread within the major diameter limits as shown in Figure 3b. The in- complete threat at each end of the thread may also deviate slightly from contour. Multiple laps on the sides of threads ar
39、e not A single lap is permissible along the side of TABLE IX. Basic Thread Height, Metric Thread PITCH BASIC THREAD 20% BASIC ( .750H) HEIGHT O. 600 o .120 1.0 1.25 1.5 0.750 1.125 o. 938 O. 150 O. 225 0.188 3.6.3 Grinding burns. The stud shall show no evidence of grinding Eurns. 3.7 Workmanship. fi
40、nish, and class of thread fit specified. quality free from laps, cracks, seams, inclusions, splits, or other defects or irregularities which would be detrimental to the performance of the stud in service use. Workmanship shall be consistent with the type of product, The studs shall be of uniform 4.
41、QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all in- spection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the c
42、ontractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed n
43、ecessary to assure supplies and services conform to “prescribed requirements. 4.1.1 Test equipment and inspection facilities, The manufacturer shall insiire that test and inspection facilities of sufficient accuracy, quality and quantity are estabiished and maintained to permit perf ormance of requi
44、red inspections. 4.1.2 Test black fabrication. Test blocks shall be fabricated in accordance with figures 4 or 5 as applicable. Test blocks may exceed dimensions specified in figures 4 or 5 to accommodate multiple testing of studs and lockrings except for tests of 4.7.1 and 4.7.2. 9 o Provided by IH
45、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-S-63275A 53 799770b 0307095 b W -Ei * -C? Ej- ,.L -ni . -i 1; 7 LAPS, SEAMS AND INCLUSIONS NOT PERMISSIBLE MAJOR DIAMETER PITCH DIAMETER -5 E -MINOR DIAMETER .-. . . . .FIGURE 2. LAPS, SEAMS, AND SURFACE THREAD P
46、ERMISSIBLE SURFACE IRREGWITIE S MAiOR DIAMETER PITCH DIAMETER MINOR DIAMETER -r -. NOT MORE .THAN 20% OF BASIC THREAD HEIGHT . .- -pod 5- . FIGURE 30. LAPS, SEAMS, AND SURFACE THREAD PERMISSIBLE SURFACE IRREGULARITIES DI AME TER PITCH DIAMETER FIGURE 3. LAPS, SEAMS, AND SURFACE THREAD 10 O. Provided
47、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- DOD-S-63275A 53 9999906 0109096 4.1.3 Test specimen installation. Sample studs and lockrings shall be installed in accordance with the applicable specification sheet in test blocks specified in _- 4.1.2. 4.1.3
48、.1 Inspection of installed studs and lockrings. The studs and lockrings in- stalled as specified in 4.1.3 shall be visually inspected under 10 diameters mag- nification. stallation shall be aause for rejection. tion which shows cause for further examination, the test specimen shall be pene- trant in
49、spected in accordance with MIL-1-6866. The presence of cracks in either test block or stud as a r.esult of in- When visual inspection discloses a condi- 4.2 Quality conformance inspection. Quality conformance inspection shall be as specified in table X. 4.2.1 Inspection lot. An inspection lot shall consist of all studs covered by a single specification sheet produced under essentially the same conditions and
