NAVY MIL-F-8961 A-1992 FASTENER ELEMENT SELF-LOCKING EXTERNALLY THREADED 450 DEG F AND 1 200 DEG F《450和1200℃对外螺纹自锁扣件元》.pdf

1、MIL-F-8SbLA 53 = 999990b 12103Y5 T83 I distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SPECIFICATIONS FEDERAL QQ-P-35 QQ-P-416 TT-E-75 1 TT-1-735 TT-N-97 PPP-H-158 MILITARY MIL-S-8879 MI L-L-460 1 O STANDARDS MILITARY MIL-S

2、TD-105 MIL-STD-1312 MS 1 5981 MS2 1 1 34 MS2 1250 MIL-F-BSbLA 53 SSSSSOb L2L034b 1iT MIL-F-8961A - Passivation Treatments for Corrosion Resistant - Plating, Cadmium (Electrodeposited). - Ethyl Acetate, Techni cal. - Isopropyl Al coho1 . - Naphtha, Aromatic. - Hardware (Fasteners and Related Items),

3、Packag Steel. ng of. - Screw Threads Controlled Radius Root with Increased - Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting. Minor Diameter, General Specification for. - Sampling Procedures and Tables for Inspection by - Fastener Test Met hods. - Fasteners, External ly Threaded, Self-Locki

4、ng, Design - Bolt, Tension, Steel, 180 KSI Ftu, 450F External - Bolt, Tension, Steel, External Wrenching, Flanged, Attributes. and Usage Limitations for. Wrenching, Spline Drive, Flanged. 12-Point, 180 KSI Ftu, 450F. (Unless otherwise indicated, copies of federal and military specifications, standar

5、ds and handbooks are available from the Standardization Document Order Desk, 700 Robbins Avenue, Bldg. 4D, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the

6、 documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). SAE Aerospace Materials Specification - AMS AMS 24

7、11 Silver Plating for High Temperature Applications. (Application for copies should be addressed to SAE, 400 Commonwealth Drive, Warrendal e, PA 15096.) : 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-9bLA 53 = 999990b L2L0347 856 MIL-F-896

8、1 A Aerospace Industries Association of America, Inc. (AIA) NAS 1348 Fasteners-Recommended Tensile Stress Areas for NAS 6704 thru Bolt, Hex Head, Close Tolerance, A286 CRES, Long External Threaded. 6720 Threads, Self-Locking and Non-Locking. (Application for copies should be addressed to Aerospace I

9、ndustries Association of America, 1250 Eye Street, NW, Washington, D.C. 20005.) American Society for Testing and Materials (ASTM) ASTM D740 Standard Specification for Methyl Ethyl Ketone. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street,

10、 Philadelphia, PA 19103-1137.) (Non-government standards and other pub1 ications are normal ly available from the organizations that prepare or distribute the documents. also may be available in or through libraries or other informational services.) These documents 2.3 Order of precedence. In the ev

11、ent of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS I 3.1 Qualification. The faste

12、ner elements furnished under this specification shall be products which are authorized by the qualifying activity for listing on the applicable qualified products list at the time of award of contract (see 4.3 and 6.3). 3.2 Materi al s. 3.2.1 Class I. The 450F elements shall be fabricated from alloy

13、 steel or high temperature plastic. the non-corrosion resistant steel shall not exceed 0.050 percent by weight. The sulphur content or the phosphorous content of 3.2.2 Class II. The 1200F elements shall be fabricated from corrosion and heat resi stant steel. 3.3 Construction. The self-locking elemen

14、t feature shall be a one-piece prevailing torque type, self-contained. 3.3.1 Lubrication. The fastener shall be provided with a coating to prevent nut-bolt seizure. Any dry film lubricant coating shall have been will identify the lubricant used, which shall not be changed without - previously qualif

15、ied to MIL-L-46010, Type I. The Qualified .Products List (QPL) requalification of the design. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-89bLA 53 M 9999906 1210348 792 0 d. p; MIL-F-8961A 3.3.2 Dimensions. Dimensions shall be as specifie

16、d on the associated detail specifications, specification sheets or MS standards. Dimensions are after plating but before lubrication. The fasteners must also meet the other requirements of the associated detail specifications, specification sheets or MS standards and acqui si tion documents. The sel

17、f-locki ng element shall be within the dimensional limitations of MS15981. 3.3.3 Threads. Thread dimensions shall be in accordance with MIL-S-8879. Threads used in the Class II locking element may be displaced in any single rolling process which will provide self-locking fasteners conforming to this

18、 specification. Thread gaging shall be performed after plating in accordance with MIL-S-8879, except that the fastener with locking device incorporated, but without lubricant, shall enter the go gage member 1 to 1-112 turns before engagement of the locking element. When the lubricant prevents the us

19、e of standard gages, the free rotation (finger torque) of the nut shall produce bolt engagement of at least one turn. 3.3.4 Plating or surface treatment. Fasteners fabricated from alloy steel shall be cadmium plated in accordance with QQ-P-416 Type II, Class 2. For dry lubricated fasteners, the type

20、 and class are optional if the fasteners conform to the salt spray requirements for of QQ-P-416 Type II plating. 3.3.4.1 1200F corrosion resistant steel (CRES). The threads of fasteners fabricated from 1200F CRES shall be silver Dlated in accordance with AMS 241 1. CRES fasteners shall be passivated

21、 per QQ-P-35. 3.4 Performance. 3.4.1 Torque. The fastener incorporating the self-locking element shall meet the torque requirements specified in table I and 4.5.4. 3.4.2 Vibration. The self-locking fasteners shall withstand the applicable vibration tests specified in 4.5.7. 3.5 Workmanship. Parts ar

22、e required to be free of burrs and slivers except slight burrs are permissible in the area of the self-locking element provided maximum locking torque values specified in table I are not exceeded. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the co

23、ntract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performanc

24、e of the inspection requirements specified herein, unless disapproved by the Government. any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. The Government reserves the right to perform

25、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i L- IIL-F-BSb1A 53 9999906 1210349 629 M MIL-F-8961A 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shal

26、l become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all

27、 requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements; however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accep

28、t defective material. TABLE I. Torque (at room temperature in inch-pounds). Bolt or Screw Size 0.2500-28-UNJF-3A 0.3125-24-UNJF-3A O. 3750-24-UNJF-3A 0.4375-2O-UNJF-3A 0.5000-20-UNJF-3A 0.5625-18-UNJF-3A 0.6250-18-UNJF-3A 0.7500-16-UNJF-3A O .8750-14-UNJF-3A 1.0000-12-UNJF-3A 1.1250-12-UNJF-3A 1.250

29、0-12-UNJF-3A Maximum Torque (instal 1 ation or re Class I 30 60 80 1 O0 150 200 300 400 600 800 900 1,000 val 1 Class II 60 120 160 200 300 400 600 800 1,200 1,600 1,800 2,000 Mi nimum Breakaway Class I 3.5 6.5 9.5 14 18 24 32 50 70 92 117 143 5 C1 ass II 7 13 19 28 36 48 64 1 O0 140 184 2 34 286 Te

30、nsi le Preload (1 bs) (fourth, ninth, and 14th installation cycles) C1 ass I 4,400 7,000 10,800 14,600 19,500 24,800 31,000 45 , O00 61,000 80 , O00 102,000 128,000 C1 ass II 2,300 3,650 5,650 7 , 660 10,200 12,950 16,200 23,500 32,000 41,800 53,600 66,800 Provided by IHSNot for ResaleNo reproductio

31、n or networking permitted without license from IHS-,-,-4 MIL-F-89bLA 53 m 99999Ob 3230350 3VO m Qualification MIL-F-8961A Test Paragraph 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: Class I 5 - 5 10 10 a. Qualification inspection (see 4.3

32、) b. Quality conformance inspection (see 4.4) Class II 5 5 5 10 10 4.3 Qualification inspection. Qualification inspection shall consist of the inspections listed in table II with self-locking feature incorporated. Qualification approval for the locking design is based on testing and evaluation of th

33、e design incorporated in 3A coarse threads for sizes smaller than No. 10 and 3A fine threads for size No. 10 and larger. Locking designs shall pass the quality conformance inspection (4.4) and conform to the dimensional limitations of MS15981. Tensile strength 4.3.1 Sampling instructions. The qualif

34、ication test samples shall consist of 70 fasteners and 70 nuts for each diameter upon which qualification is desired. These fasteners shall incorporate the self-locking design and conform to the configuration listed in table III, but shall be of the material as specified in 3.2.1 and 3.2.2, and the

35、nuts shall conform to the dimensions in table IV. Samples shall be identified as required and forwarded to the activity designated in the letter of authorization from the activity responsible for qualification (see 6.3). 4.5.1 4.3.2 Certified test report. The manufacturer shall make available to the

36、 activity responsible for qualification a certified test report showing that the manufacturers product conforms to this specification. The test report shall include as a minimum, actual numerical results of each of the tests or examinations specified herein and listed in the order of their appearanc

37、e in table II, including photographs of macro- and micro-examinations. When this report is made available, it shall be accompanied by a detail drawing which completely describes the manufacturers product by specifying al 1 dimensions and tolerances, composition of material, selected coating or plati

38、ng applied, and the heat treatment. length shall be included on the above drawing. Failure of a manufacturer to make available a satisfactory certified test report with the qualification samples shall be sufficient cause for rejection of the qualification request. The manufacturers part number for e

39、ach size and Torque High temperature torque TABLE II. Qualification test and samples required. 4.5.4 4.5.5 Stress rupture Examination of product 4.5.2 4.5.3 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-8SbLA 53 999SSb L2L35L 287 Qualificat

40、ion Minimum breakaway at maximum temperature Reusabi 1 i ty Vi bration Y w 0 Test Paragraph Class I Class II 4.5.5.2 10 10 4.5.6 10 10 4.5.7 10 10 MIL-F-8961A TABLE II. Qualification test and samples required - Continued. 4.3.3 Retention of qualification. To maintain qualification on a QPL, certific

41、ation shall be requested to indicate continued compliance with the requirements of this specification. Certification shall be requested from each manufacturer by the Naval Air Warfare Center Aircraft Division Warminster (NAWCADWAR), Code 6013, Warminster, PA 18974. NAWCADWAR will forward certificati

42、on to the Naval Air Warfare Center Aircraft Division Lakehurst. Certification shall be at the time of the two-year review and shall be signed by a responsible official of management, attesting that the listed product(s) is (are) still available from the listed plant; can be produced under the same c

43、onditions as originally qualified; i.e., same process, materials, construction, design, manufacturers part number or designation, and meets the requirements of the current issue of the specification. the certification will be cause for removal from the QPL. 1. Failure to provide 4.4 Quality conforma

44、nce inspection. Prior to installation of the self-locking element, the quality conformance inspections of the applicable fastener specification shall be met. After installation of the self-locking element onto the applicable fastener, the quality conformance inspections specified in table V shall be

45、 met. In addition, self-locking bolts and screws shall meet any other tests which are considered necessary by the procuring activity to determine conformance with the requirements of this specification. 4.4.1 Sampling. The sample shall be selected at random from each lot as speci fi ed be 1 ow. 4.4.

46、1.1 Random sample. A random sample is a specific number of items so selected that each item of the lot from which the sample is drawn has the same chance of being the first item in the sample. sample is drawn, each of the remaining items has the same chance of being the second item in the sample, an

47、d so on. After the first item in the 4.4.1.2 M. A “lot“ shall consist of fasteners with the same diameter and of the same length; fabricated by the same process; heat treated in the same manner; and produced as one continuous run or order. These finished fasteners will then have the self-locking ele

48、ment incorporated, and this “lot“ will be used in the QualificationlQuality Conformance Testing of the applicable fastener(s. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-J MIL-F-89bLA 53 999990b 3230352 113 Class I Part No. Length Dash No. MIL-

49、F-8961A Class II Part No. Length Dash No. TABLE III. Configuration of fasteners required for qualification tests. MS21134 or MS21250-O4 -05 -06 -07 -08 -09 -1 o -1 2 -1 4 -1 6 -1 8 -20 02 2 02 2 022 022 022 02 2 022 022 022 022 022 022 Thread size 0.2500-28-UNJF-3B O. 31 25-24-UNJF-3B 0.3750-24-UNJF-3B 0.4375-24-UNJF-3B 0.5000-20-UNJF-38 0.5625-1 8-UNJF-3B 0.6250-1 6-UNJF-3B 0.7500-1 6-UNJF-3B NAS 6704 6705 6706 6707 6708 6709 6710 67