1、a 4 a O “0s- 03 MIL-I-45910C 11 March 1985 SUPERSEDING 28 June 1976 MIL-1-459 1 OB MILITARY SPECIFICATION INSERT, SCREW THREAD-LOCKED IN AND RING LOCKED, SERRATED GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1
2、.1 Scope. This specification covers the requirements for locked-in inserts. The method of locking in the insert is by means of a serrated collar and an accessory lockring with matching serrations installed within the parent material to prevent rotation. 2. APPLICABLE DOCUMENTS 2.1 Government documen
3、ts. 2.1.1 Specifications, standards and handbooks. The following specifications, standards and handbooks form a part of this specification to the extent specified herein. Unless otherwise specified, the issues shall be those listed in the issue of the Department of Defense Index of Specifications an
4、d Standards (DoDISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS FEDERAL QQ-A-225/6 Aluminum Alloy Bar, Rod, and Wire; Rolled, Drawn, or Cold QQ-A-250/6 Aluminum Alloy 5083, Plate and Sheet QQ-P-416 Plating, Cadmium (Electrodeposited) PPP-H-1581 Hardware (Fasteners and Related
5、Items), Packaging of Finished, 2024 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, Nunitions and Chemical Command, ATTN:AMSMC-TDA-S(D), Dover, New Jersey 07801-500
6、1 by using. th self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. DISTRIBUTION STATEMENT A. DISTRIBUTION UNLIMITED. APPROVED FORPUBLIC RELEASE; / 7 FSC 5340 / ._ THIS DOCUMENT CONTAINS PAGES “ r . Licensed by Information Ha
7、ndling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILITARY MIL-S-5626 - %eel; Chrome-Molybdenum (4140) Bars, Rods, and Forging Stock MIL-1-6866 - Inspection, Penetrant Method of MIL-1-6868 - Inspection Prc)ce.ss, Magnetic Particle MIL-A-
8、8625 - Anodic Coatings,for Alumhum and Aluminum Alloys MIL-C-8837 - Coating, Cadmiam (Vacuum Deposited) MIL-S-8879 - Screw Threads; Conkrolled Radius Root with Increased Minor MIL-L-8937 -. Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting MIL-T-9047 - Titanium and Titanium Alloy Bars (Rolled
9、or Forged) and (For Aircraft Applications) Diameter; General Specification for Reforging Stock, Aircraft Quality STANDARDS PE3 ERAL FED-STD-H28/2 - Screw-Thread Standard6 for Federal Services, FED-STD-H28/20 - Screw Thread Standard for Federal Services, Section 2, Unified lnch Screw Threads-UN and U
10、NR Thread Forms Section 20,. Inspection Method-s for Acceptability of UN, UNR, UNJ, M and MJ Screw-Threads MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-453 - Inspection, Radiographic MIL-STD-1312 - Fasteners Test Methods (See supplement 1 for list Gf MS
11、sheet form standards.) (Copies of specifications, standards, handbooks, drawings, and publications required by manufacturers in connection with specific acquisition functions should beobtained from the contracting activity or as directed by the contracting officer.) 2 Provided by IHSNot for ResaleNo
12、 reproduction or networking permitted without license from IHS-,-,-MIL-1-459 1OC 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the doc- uments that are adopted by DoD shall be those in the D
13、oDISS cited in the solicita- tion. Unless otherwise specified, the issues of documents which have not been adopted shall be the issue of the nongovernment documents which are current on the date of the solicitation. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI B46.1 - Surface Texture (Applicati
14、ons for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018). NATIONAL AEROSPACE STANDARDS (NAS) NAS 672 - Plating - High Strength Steels - Cadmium (Applications for copies should be addressed to the Aerospace Industries Association, of America,
15、 Inc., 1725 DeSales Street, NW, Washington, DC 20036.) AEROSPACE MATERIAL SPECIFICATIONS (AMs) AMs 2411 - Silver Plating for High Temperature Applications AMs 4967 - Titanium Alloy Bars, Forgings and Rings AMs 5731 - Steel Bars, Forgings, Tubing, and Rings, Corrosion and Heat Resistant AMs 5734 - St
16、eel Bars, Forgings, Tubing, Corrosion and Heat Resistant AMs 6382 - Steel Bars, Forgings and Rings (Applications for copies should be addressed to the Society of Automotive Engineers Inc., 400 Commonwealth Drive, Warrendale, PA 15096.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) . ASTM A 108 -
17、 Steel Bars, Carbon, Cold-Finished, Standard Quality ASTM A 380 - Cleaning and Descaling Stainless Steel Parts, Equipment and Systems (Applications for copies should be addressed to the American Society for Testing (Nongovernment documents are normally available from the organizations which prepare
18、and Materials, 1916 Race Street, Philadelphia, PA 19103:,) or which distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict between the text of this spec- ification and the reference
19、s cited herein (except for associated detail specifications, specification sheets or MS standards) , the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific. exemption has been obtained. 3. REQUIR
20、EMENTS 3.1 MS sheets. The individual item requirements shall be as specified herein and in accdrdance with the applicable MS sheets. In the event of any conflick between re- quirements of this specification and the MS sheet, the latter shall govern. Provided by IHSNot for ResaleNo reproduction or ne
21、tworking permitted without license from IHS-,-,-MIL-I-45910C 3.2 Material. Recycled and reclaimed materials (see 3.1) shall be used to the maximum extent practicable. The insert shall be a one piece all metal unit. The insert and lockring shall be made from the following materials as specified in th
22、e applicable MS sheet (see 3.1) when inspected in conformance with 4.6.2. 3.2.1 Carbon and alloy steel. Carbon steel shall be grade 1117 (UNS 211170) in accordance with ASTMA 108. Alloy steel shall be grade 4140 (UNS G41400) in accordance with MIL-S-5626 or AMs 6382. 3.2.2 Corrosion-resistant steel.
23、 Corrosion-resistant steel shall be type A286 (UNS S66286) in accordance with AMs. 5731 or ANS 5734. 3.2.3 Titanium alloy. Titanium alloy shall be type Ti-6A1-4V (UNS R56400) in accordance with MIL-T-9047 or AMs 4967. 3.3 Protective finishand surface treatment. The insert and lockring shall be furni
24、shed Qith a protective plating or surface .treatment as specified in the app-licable ?is sheet (see 3.1) when inspected in conformance with 4.6.3. 3.3.1 Carbon and alloy steel. Inserts of carbon or alloy steel and lockrings of carbon steel shall be cadmium plated in accordance with QQ-P-416, Type II
25、 Class 3. 3.3.2 Corrosion-resistant steel. Corrosion-resistant inserts and lockrings shall be cleaned, descaled and passivated in accordance with ASTM A 380. When specified in the applicable MS sheet (see 3.1), corrosion-resistant steel inserts shall be silver plated in accordance with AMs 2411, ,00
26、02 inch minimum thickness When specified in the applicable MS sheet (see 3. I) , corrosion-resistant steel inserts shall have a dry film lubricant applied in accordance with MIL-L-8937. 3.3.3 Titanium alloy. Titanium alloy inserts shall have an anodic coating. 3.4 Design, dimensions and tolerances.
27、Design, dimensio.ns and.tolerances shall be in accordance with the requirements of the applicable MS sheet: (see 3.1) and shall apply after application of the protective finish or surface treatment specified in 3.3. 3.4.1 Threads. Threads shall be right hand in accordance with the applicable KS shee
28、t (see 3.1) 3.4.1.1 External threads. External threads shall be in accordance with FED-STD-H28/2 with pitch and minor diameters as specified in the applicable MS sheet (see 3.1) for fine and coarse threads. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
29、HS-,-,-MIL-I-573OC 53 W 7777706 0307082 7 W a MIL-I-4591OC 3.4.1.2 Internal threads. Internal threads shall be in accordance with MIL-S-8879 as specified in the applicable MS sheet (see 3.1). Internal threads which include locking feature shall be displaced or deformed as specified in 3.4.2. The ins
30、ert without lubricant shall allow the “go“ gage to enter not less than bne-half turn before engagement of locking feature. When an insert with lubricant prevents the use of standard gages, the insert shall permit a minimum free rotational bolt thread en- gagement of chree-fourths turn before engagem
31、ent of the locking feature. 3.4.1.3 Thread forming. Threads may be produced either by machining, grinding, of-flly formed by a single rolling process Ln the event the external threads are rolled, the grain flow in the threads shall follow the general thread contour withthe maximum density at the bot
32、tom of the root radius as shown in figure 1 in accordancewith 4.7.6. 3.4.1.4 Incomplete and lead threads. Incomplete and lead threads, unless other- wise specified shall be in accordance with MIL-S-8879. 3.4.1.5 Thread concentricity. The internal thread pitch diameter shall be concentric with the ex
33、ternal thread pitch diameter within .O06 FIM. 3.4.2 Internal thread locking feature. The internal thread of the insert shall be distorted to impose friction between the insert and the inserted item. The feature shall not operate by means of separate movement from the installation, nor depend upon ax
34、ial load on the insert wall. 3.4.2.1 Self-locking torque. When the insert is properly installed in the parent material, the locking feature shall provide a locking torque with a mating screw or bolt that is within the limits specified in tab1.e I 7hen tested in accordance with 4.7.2. Inserts shall n
35、ot be subjected to self-locking tests after testing as specified in 4.7.3, 4.7.4 or 4.7.5. - PITCH DIAMETEP. Figure 1. Thread grain flow. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-14IL-I-459 1OC TABLE I. Internal thread, self-locking torque,
36、INSERT INTERNAL THREAD NOMINAL SIZE FINE OR COARSE 112 . 138 ,164 -190 .250 .3125 .375 -4375 .500 .562 5 .625 .750 .875 1.000 k51498, Ms51991, E51993 MAX LOCKING TORQUE T NCH-LRS 5 10 15 18 30 60 80 1 O0 150 200 300 400 600 8 O0 MIN . BREAKAWAY TORQUE INCH-LBS 1/ 1TO 1.5 2 .-o 3.5 6.5 9.5 14. O 18.0
37、 24 .O 32.0 50.0 70.0 90. o 1/ Some indication of torque - 3.4.3 Locking serrations. 3.4.3.1 Insert locking serrations. Insert locking serration dimensions shall conform in size to MS51498, MS51991 or MS51993 and applicable dash number and shall be of full form. 3.4.3.2 Lockring serrations. Lockring
38、 serration dimensions for both internal and external serrations shall conform in size to MS51990 or MS51997 and applicable dash number. 3.4.3.3 Serration concentricity. The internal serrations.shal1 be concentric with the external serrations within .O06 FTM. 3.4.4 Surf ace texture. Surface “texture
39、of .the inser-t arid-.lo:ckring prior .to plating shall not exceed the values specified in the applicable MS sheet (see 3.1) and shall be in accordance with ANSI B46.1 when tested in conformance with 4.6.6. 6 “ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
40、 IHS-,-,-i 3.5 Mechanical properties. Inserts confomgng to the.des$gn and dimensions specified in the applicable MS sheet (see 3.1) and having load ratings as specified in table II shall be capable of developing a minimum tensile strength, a minimum proof s.trength and have shear engagement areas in
41、 accordance with table II. TABLE II. fiechanicai Properties. I KSI KSI STRENGTH PROO F (EXTERNAL rtIRLWS) KSI SIRENGTI MS51991 125 I 125 I TABLE v I 1v I COL 1 TABLE v COL 2 I MI NI MUM LO AD lENS L LE KATING STRENGTH KSI KSI 1 220 1 240 MINIMUM TENSILE RAT1 NG STRENGTH I 220 I 240 I MINI“ SHEAR ENG
42、AGEMENT AREA PROO F (EXTERNAL THREADS) I STRENGTH MS51993 KS I -500 I -640 I -800 I I NUMBERS I NUMBERS I NUMBERS I 220 . TABLE V TABLE V. TABLE V COL 3 COL 4 COL 5 MINIMUM SHEAR ENGAGEMENT AREA PROO F (EXTERNAL T KREADS). STRENCIH I MS51498. KSI -500 1 -640 I -800 i I NUMBERS I NUMBERS 1 NUMBERS .
43、I I 220 I I COL 7 I COL 8 TABLE V TARLE V I 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.5.1 f4inimum applied axial load. The installed insert (with lockring in place) shall develop the minimum axial load as specified in table III. Axial value
44、s are based on the tensile stress area of the applicable test bolt and the minimum tensile strength specified in table II when tested as specified in 4.7.3. TABLE ILI. Axial load at specified stress -level. NOMINAL TENSILE 1/ MINIMUM APPLIED AXIAL LOAD (LBS) SIZE STRESS AREA (N) MS51991 MS51498 .ooo
45、 14 , 800 20,000 25 y 400 32,000 46,600 63,600 82,900 tOOF LOAD (LBS) G51498 Sr MS51993 220 KSI - 3/ “ “ “ 4 , 400- 8,000 12,800 19,300 26 , 100 35,200 “ “ “ “ “ - 1 / The tensile stress areas used for the calculation of the axial load values are based on the stress area per formula specified in FED
46、-STD-H28/2, - 2/ The minimum applied axial loads shown are the product of the applicable tensile stress area times 125 KSI. - 3/ The minimum applied proof loads shown are the product of the tensile stress area times 220 KSI, Provided by IHSNot for ResaleNo reproduction or networking permitted withou
47、t license from IHS-,-,-3.5.3 Resistance to pullout. The insert shall demonstrate minimum shear engagement areas as specified in tabl V. The installed insert with lockring in p1ace:as specified in 4.1.3 shall have a minimum resistance to pullout in accordance with table VI. Values specified in table
48、VI are based on the minimum shear engagement areas of the insert (Table V) when installed in a test block of 25 KSI shear strength when tested as specified in 4.7.4. TABLE V. Minimum shear engagement area of insert external thread 1/ - NOMINAL SIZE (INTERNAI THREAD) ,112 .138 .164 .190 ,250 . .3125
49、.375 .4375 .500 5625 .625 ,750 .875 1.000 .112 .138 .164 .190 .250 .3125 .375 ,4375 ,500 .5625 .625 .750 .a75 L .o00 MINIMUM SHEAR ENGAGEMENT AREA (IN2) - INSERT, NON LOCKED L/ MS51991 -100 quality and quantity are established and maintained to permit performance of required inspections. 16 “r“=-. 7 - Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
