1、7 nsr _I._ I - :- -i- / r r MIL-1-45934 . 2 30 JUNE 1971 J : . kT . -! L MILITARY SPECIFICATION INSERT, SCRJ3W THREAD, KEYRING LOCKED, SELF-LOCKING AND NON SELF-LOCKING, 125, 180, AND 220 KSI FTU; GENERAL SPECIFICATION FOR This specification is mandatory for use by all Departments and Agencies of th
2、e Department of Defense. 1. SCOPE 1.1 Scope. This specification -covers locked in, screw thread inserts which have an integral locking keyring to prevent rotation of the insert when installed in the parent material. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date o
3、f invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS Federal QQ-A-225/6 - Aluminum Alloy Bar, Rod and Wire, Rolled or Cold pA-225/9 QQ-A-250/6 - Aluminum Alloy, 5083, Plate and Sheet. Q-P- 3 5 Finished, 2024. - Aluminum Alloy
4、Bar, Rod, Wire and Special Shapes; Rolled, Drawn, or Cold Finished, 7075. - Passivation Treatment for Austenitic, Ferritic and Martensitic Corrosion-Resisting Steel (Fastening Devices). . 2 E Q-P-416 - Plating, Cadmium (Electrodeposited). QQ-S-764 - Steel, Bar, Corrosion Resisting, Free Machining. 1
5、 QQ-W-423 - Wire, Steel, Corrosion Resisting. P PPP-H-1581 - Hardware (Fasteners and Related Items), Packaging t 1 and Packing for Shipment and Storage of. Military MIL-S-5626 - Steel: Chrome Molybdenum (4140) Bars, Rods, and MIL-S-6758 - Steel, Chrome-Molybdenum (4130) Bars and Forging MIL-1-6866 -
6、 Inspection, Penetrant Metihod of. MIL-1-6868 MIL-H-6875 - Heat Treatment of Steels (Aircraft Practice, Forging Stock (For Aircraft Applications). Stock (Aircraft Quality). - Inspection Process, Magnetic Particle. Process for). - +. 1. FSC 5340 -7- A$ a MIL-W-52263 - Wire, Steel, Corrosion Resisting
7、, Free Machining Stock. - Anodic Coatings for Aluminum and Aluminum Alloys Minor Diameter; General Specification for. STANDARDS Federal Fed. Test Method Std. No. 151 - Metals; Test Methods. Military MIL-HDBK-5 - Metallic.Materials and Elements for Aerospace Vehicle MIL-STD-105 - Sampling Procedures
8、and Tables for Inspection by MIL-STD-109 - Quality Assurance Tenns and Definitions. MIL-STD-1312- Fasteners, Test Methods. Structures. Attributes. (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtain
9、ed from the procuring activity or as directed by the contracting officer.) See Supplement 1 for list of associated specification sheets or detail specifications. 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicat
10、ed, the issue in effect on date of invitation for bids or request for proposal shall apply. . National Bureau of Standards. Handbook H28 - Screw-Thread Standards for Federal Services. (Application for copies should be addressed to the Superintendent of Documents, U. S. Government Printing Office, Wa
11、shington, D. C. 20402). American National Standards Institute (ANSI) Standard. ANSI B46.1 - Surface Texture (Surface Roughness, Waviness and Lay) (Application for copies should be addressed to the American National Standards Institute, Incorporated, 1430 Broadway, New York, New York 10018.) 2 5 *. P
12、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- MIL-1-45934 53 W 777770b 0307284 T W MIL-1-45934 Aerospace Material Specifications AMs2411 - Silver Plating (For High Temperature Applications). AMs5504 - Steel Sheet, Strip, and Plate, Corrosion and
13、Moderate AMs5610 - Steel, Corrosion and Moderate Heat Resistant. AMs5737 - Steel Bars, Forgings, and Tubing, Corrosion and Heat Heat Resistant. Resistant. (Application for copies should be addressed to the Society of Automotive Enyineers, Inc., Two Pennsylvania Plaza, New York, New York 10001.) Amer
14、ican Society for Testing and Materials (ASTM) Publications l.l shall be heat treated in accordance with MIL-H-6875. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-1-45934 53 9999906 0107285 I = t pllIGI-45934 3.4 Protective plating or surface t
15、reatment. Inserts and locking keyrings shall be furhished with a protective plating or swface treatment as specified herein. Cadmium plating. Unless otherwise specified, inserts I i! I 3.4.1 _. fabricated from alloy steel shall be cadmium plated in accordance with QpP-416, Type II, Class 2. The enti
16、re insert an keyring shall be plated. fi 3.4.2 Silver plating. When specified, inserts shall be silver plated in accordance with AMS2411. plated. The entire insert and keyring shall be 3.4.3 Passivation. Inserts fabricated from corrosion-resistant steel and locking keyrings shall be passivated in ac
17、cordance with QQ-P-35. 3.5 Lubrication. Inserts with self-locking internal threads shall be solid film lubricated. The lubricant shall conform to MIL-L-8937. 3.6 Design, dimensions and tolerances. Inserts and locking key- rims shall be in accordance with the design, dimensions and tolerances - speci
18、fied. the protective plating or surface treatment and prior to application of the lubricant as specified in 3.5. These dimensions and tolerances shall apply after application of 3.7 Construction. The insert, locking keyring and internal thread locking device shall be an integral all-metal unit. , 3.
19、8 Threads 3.8.1 Insert internal and external threads shall be right hand. 3.8.2 Internal threads. Internal threads shall conform to Handbook H28, Part X, and MIL-S-8879, except as noted in MIL-N-25027 for self-locking inserts. Sizes and dimensions shall be as specified on MIL-I-45934/1, MIL-I-45934/
20、2 and MIL-I-45934/3. performed after plating and prior to application of the lubricant, as applicable. gage shall enter a minimum of 3/4 turn before epgagement of the locking device. gages, the insert shall permit a minimum free rotational bolt thread engagement of 3/4 turn before engagement of the
21、locking element. Thread gaging shall be When a locking feature is employed (see 3.8.7), the GO plug When the application of a lubricant prevents the use of standard 3.8.3 External threads. External threads shall be in accordance with MI the removal cycle shall be considered complete when the locking
22、 feature is disengaged. The maximum locking torque encomtered on any installation or removal cycle shall not exceed the values specified in Table I. The minimum breakaway torque for any cycle shall not be less than the values specified in Table I. 4.6.2 Axial strength (proof) test. Test specimens in
23、stalled into test blocks (Figure 2) as specified in 4.4.2.2 shall be used for axial strength testing. bolt shall assemble freely into the insert prior to engaging the self-locking device with finger torque and shall be of sufficient length to extend through the insert a minhum of two (2) pitches (in
24、cluding bolt thread chamfer). The bushing and test block clearance holes in the upper and lower yokes (see Figure 4) shall have a free fit not in excess of 0.060 inch greater than the bushing and testblock diameters. The bolt clearance hole in the upper bushing (see Figure 4) shall be .O06 to .O15 i
25、nch diameter larger than the nominal diameter of the test bolt. The minimum axial load specified in Table II, as applicable, shall then be applied to the assembly and failure of the insert shall not occur below those loads specified in Table II. In the event of bolt failure below the applicable axia
26、l strength rating, the test shall be repeated until the applicable axial strength rating of the insert is exceeded. Rate of loading shall not exceed 100,000 PSI per minute per square inch based on the shank area of the bolt. Test shall be in accordance with Test No. 8, MIL-STD-1312. The test 15 Prov
27、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-45934 Bushing Clearance Bushing ID Minus #om Bolt Dia = .QU i. O05 Test Bolt (4.4.2.3) Upper Yoke / /- Bushing Direction of Lood I 1 I - LTest Specima a8 6peclfled lIL 4.4.2.2 FIGURE 4. Axial Load (4.
28、6.2) and Resistance to Pull-Out Test Fixture (4.6.3) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-45934 4.6.3 Resistance td pullout test. Test specimens installed into test blocks (Figure 2) as specified in 4.4.2.2 shall be used for resistan
29、ce to pullout tests. 4.6.2 except the minimum resistance to pullout strength specified in Table III, as applicable, shall be applied to the assembly. insert to stay in the test block shall not occur below the loads specifie in Table III. strength rating, the test shall be repeated until the minimum
30、pullout strength rating of the insert is exceeded. per minute per square inch based on the shank area of the bolt. aluminum alloy stock used in the test blocks shall be tested to determine its ultimate shear strength and test values shall be adjusted accordingly to correspond with a value for ultima
31、te shear strength of 25,000 PSI. The procedure used shall be the same as required for Failure of the In the event of bolt failure below the applicable pullout Rate of loading shall not exceed 100,000 PSI The 5083 4.6.4 Rotational resistance test. Test specimens instailed into test blocks (Figure 3)
32、shall be used for rotational resistance tests. Torque-out values, with no axial load on the insert, shall not be less than the values specified in Table IV using a test assembly as illustrated in Figure 5. When the near side face of the insert is installed, the far side of the insert shall extend a
33、distance of one and one-half to two external threads of the insert past the far side of the test block allowing it to fit into the countersink of the bushing. bushing countersink to prevent it from expanding under pressure. bolt shall enter the insert from the back side (opposite normal entry), and
34、shall be torqued in a clockwise direction. specified in Table IV shall be cause for rejection. The insert shall fit into the The test Failures at values below those Torque Wrench (4.6.4) f Bushing Countersink DL4 .O15 Urger tbsn MJor Diameter of External Tixreod of Insert. Coun- tcrsink Ange to be 6
35、0“. Test Bolt (4.4.2.3) Gep equal to one and if2 to 4x0 Externa1 Thread Pitches est SpeciPien 81; Specified Insert - forward side NOTE: Above test procedure used with insert in the as received condition. FIGURE 5. Torque Test Fixture (4.6.4) * I. l7 3 Provided by IHSNot for ResaleNo reproduction or
36、networking permitted without license from IHS-,-,-MIL-1-45934 53 M 9999906 0107299 1 M MIL-1-45934 4.6.5 Hardness test. .Samples of inserts taken in accordance with 4.4.4 shall .be tested for hardness requirements of 3.9.4. shall be Test No. 6 of MIL-CTD-1312 for alloy steel and ASTM E10 for corrosi
37、on- resistant steel, The test proceaure 4.7 Chemical analysis. The sample insert taken in accordance with 4.4.4 shall be tested for the composition requirement of 3.2.1 and 3.2.2. The test procedure shall be by Method 111.2 or 112.2 of Federal Test Method No. 151. 4.8 Discontinuitres. Magnetic parti
38、cle inspection performed in accordance with MIL-1-6868 for alloy steel qd penetrant particle inspection performed in accordance with MIL-1-6866 for Corrbsidn-resistant steel chEl1 be used to determine the presence of cracks and discontinuities such as laps, seams and inclusions. 5. PREPARATION FOR D
39、ELIVERY 5.1 Preservation, packaging, packing and marking. Unless otherwise specified, preservation, packaging, packing and marking shall be in accordance with PPP-H-1581. 5.2 Levels. Levels of packaging and packing shall be as specified by the procuring activity. (See 6.2) 6. NOTES 6.1 Intended use.
40、 Inserts covered by this specification are intended as a general purpose fastener with mechanical key ring locked feature to resist rotation. 6.2 Ordering data. Procurement documents should specify the following : a. Title, number and date of.the specification. b. Title and number of applicable Mili
41、tary Specification Sheet. c. Insert material, if other than alloy steel (See 3.2). d. Quantity required. e. Selection of applicable levels of preservation, packaging and packing required (See 5.1). 6.3 Definitions. 6.3.1 Crack. A crack is defined as a clean crystalline break passing through the grai
42、n or grain boundary without the inclusion of foreign elements. Lap. A lap is a surface defect appearing as a seam, caused - 6.3.2 by the folding over of metal fins or sharp corners and then rolling or forging them into the surface, but not welding them. 18 # Provided by IHSNot for ResaleNo reproduct
43、ion or networking permitted without license from IHS-,-,-MIL-I-Y5734 53 9977706 OL07300 4 = 1 MIL-1-45934 6.3.3 - Seam. A seam is an unwclded fold or lap t. hich appears as an opening in the raw material a6 received from the source. Custodians : -Y - - wc Navy - AS Air Force - 82 Review Activities: -Y - AT, AV, EL, MU Navy - None Air Force - 11 DCA-IS NSA Preparing activity: my - wc Project NO. 5340-0866 User activities: -Y - GL, ME Navy - MC, SH Air Force - None Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
