1、-_ - - _ MIL-H-21722B M 9999906 II252040 II36 W -. 1 I NCH-POUND i 30 SeDtember 1942 MIL-H-21722B(AS) Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Air Warfare Center
2、 Aircraft Division Lakehurst, Systems Requirements Department (Code SR3) Lakehurst, NJ 08733-5100, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. SUPERSEDING MIL-H-21722A(AS 25 APRIL 1969 MILITARY SPECIFICA
3、TION HOOKS, THRUST AND STABILIZING, JATO 4500 POUNDS NOMINAL THRUST This Specification is approved for use by the Naval Air Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers th
4、e manufacture, inspection, and testing requirements for hooks, thrust and stabi 1 izing, Jet Assisted Take-off (JATO) 4500 pounds nominal thrust suspension system. 2. APPLICABLE DOCUMENTS * 2.1 Government documents. * 2.1.1 Specifications, standards, and handbooks. The following specifications, stan
5、dards, and handbooks form a part of this document to the extent specified herein. Urlless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (se
6、e 6.2b). SPECIFICATIONS FED ERAL A-A- 1898 L-P-378 PPP- B-636 P P P- B- 6 E O Cushioning Material, Ce1 Plastic, Sheet and Strip Polyolefin ulosic, Packaging Thin Gage, Boxes, Shipping, Fiberboard Boxes, Fiberboard, Corrugated, Triple-Wall AMSC NIA FSC 1680 DISTRIBUTION STATEMENT A. Approved for publ
7、ic release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-2L722B M 9999906 L2.52041 072 M MIL-H-21722B(AS) SPECIFICATIONS MI LI TARY MIL-P-116 MI L-L-10547 STANDARDS MI LI TARY Preservation, Methods of Liners, Case,
8、 and Sheet, Overwrap, Water Vaporproof or Waterproof, Flexible MIL-STD-100 Eng,neering Draw,ng Pract,ces MIL-STD-129 Marking for Shipment and Storage MIL-STD-970 Standards and Specifications, Order of Precedence for the Selection of (Unless otherwise indicated, copies of federal and military specifi
9、cations, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) * 2.1.2 Other Government documents, drawings and publications. The following other Government documents, drawings, and publications form a par
10、t of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. DRAW I NGS NAVAIR 67A301 D1 Fixture, Test, Vibrations, Life, Release Function NAVA1 R 67A302D2 Fixture, Test, Static, Repeat Load NAF 603894 Hook, Thrust, JATO, Retractable
11、NAF 603922 Hook, Stabilizing, JATO, Retractable (Unless otherwise indicated, copies of drawings are available from the Naval Air Technical Services Facility (NATSF) (Code 31211, 700 Robbins Avenue, Philadelphia, PA 19111-5097.) 2.2 Non-Government publications. The fol lowing document(s1 form a part
12、of this document to the extent specified herein. Unless otherwise specified, the issues of the 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 documen
13、ts cited in the sol ici tation (see 6.2b). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B 117 Method of Salt Spray (Fog) Testing (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.) 2 . Provided by IH
14、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* ( Non-Gov -_ MIL-H-21722B m 999990b 1252042 TO9 m MIL-H-21722B(AS) rnment standards and other wblications are normally vai lable from the organizations that prepare or di str; bute the documents. also may be availa
15、ble in or through libraries or other informational services.) These documents 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing i n thi s document, however, supersedes appl i cab1
16、 e 1 aws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS * 3.1 First Article. When specified (see 6.2c, a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.3. 3.1.1 Manufacturing. The thrust hooks shall be manufactured in accordance w
17、ith NAF Drawing 603894. The stabilizer hooks shall be manufactured in accordance with NAF Drawing 603922. 3.1.2 Selection of specifications and standards. Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with MIL-STD-970. 3.2 Ma
18、terials. Materials shall conform to specifications, shall be as specified herein, and on the drawings. Materials which are not covered by specifications or standards shall be of the best commercial quality, the lightest practical weight, and entirely acceptable for the purpose intended. 3.2.1 AN or
19、MIL standard parts. AN or MIL standard parts shall be used and shall be identified on the drawing by their part numbers. utility parts such as screws, bolts, nuts, and cotter pins, may be used, provided they possess acceptable properties and are replaceable by the AN or MIL standard parts without al
20、teration, and provided the corresponding AN or MIL part numbers are referenced in the parts list and on the contractors drawings. If there is no acceptable corresponding AN or MIL standard part in effect on date of invitation for bids, commercial parts may be used provided they conform to al 1 requi
21、rements of this specification. Commercial * 3.3 Interchangeability of parts. All parts having the same manufacturers part number shall be functionally and physically interchangeable with each other with respect to installation and performance. Changes in manufacturers part number shall be governed b
22、y the drawing number requirements of MIL-STD-100. 3.4 Performance. The JATO hooks shall function when subjected to the tests specified in section 4. 3.5 Weight. The weight of the thrust hooks shall not exceed 4.0 pounds The weight of the stabilizer hooks shall not exceed 1.6 pounds. 3.6 Identificati
23、on. Each hook shall be identified on the frame of the hook with the contract number and the contractors code number. A method of marking shall be selected which will not affect the structural integrity or the performance of the hook and which cannot easily be removed. 3.7 Lubrication. Lubricant, Mol
24、ykote G manufactured by the Alpha-Molykote Corporation, Stamford, Connecticut, or equivalent, shall be used. The hooks shall be lubricated as follows: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-21722B 9999906 1252043 945 m Ir * MIL-H-21722
25、B(AS) a. Prior to assembly of the thrust hook, apply a thin coat of the lubricant to the working surfaces of parts 603894-12 (keeper), 603894-11 (lever), 603894-20 (hook-plate), and 603894-3 (latch assembly). Also apply a thin coat of lubricant to the diameter of pins 603894-29, 603894-30, and 60389
26、4-31. After assembly, actuate the hook several times. This will spread the lubricant evenly and work it into the surfaces of the parts. b. Prior to assembly of the stabilizing hooks, apply a thin coat of the lubricant on the work surfaces of 603922-3 (assembly), 603922-10 (sear), and 603922-4 (hook)
27、. Also apply a thin coat of lubricant on the diameter of pins 603922-7 and 603922-17. After assembly, actuate the hook sev ral times. This will spread the lubricant evenly and work it into the surfaces of the parts. c. After assembly, there will be no sma clinging to the sides of the parts. 1 gobs o
28、f lubricant d. The use of the term working surfaces, as used herein, defines those surfaces of levers or parts which come into contact with other moving parts of the assembly. 3.8. Test fixtures, 3.8.1 Life test. The life test fixture and the hydraulic jettison system used in conducting the life tes
29、t (see 4.6.4) shall be in accordance with NAVAIR Drawing 67A301D1. The test fixture chal 1 be mounted on a level support capable of absorbing the jetti son forces. e (see i npu stat 3.8.2 Vibration test. 4.6.3) shall be the same as that used for the life test. The vibration monitoring location shall
30、 be as indicated in NAVAIR Drawing 67A301D1. The test fixture used to perform the vibration test 3.8.3 Static and repeat load test. The test fixture used to perform the c and repeat load test (see 4.6.5) shall be constructed in accordance with NAVAIR Drawing 67A302D2. 3.9 Workmanship. Any variation
31、in uniformity of hooks, sharp edges, burrs, surface pits, inferior plating, or any other visible evidence of careless workmanship shall be cause for rejection. 4; QUALITY ASSURANCE PROVISIONS this SUPP * requ spec * 4.1 Responsibi1it.y for inspection. Unless otherwise specified in the contract or pu
32、rchase 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 performance of the ins
33、pection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in sPecification where such inspections are deemed necessary to ensure ies and services conform to prescribed requirements. 4.1.1 Responsibility
34、for compliance. All items shall rements of sections 3 and 5. The inspection set forth fication shall become a part of the contractors overa 4 meet all in this 1 inspection system Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I- MIL-H-21722B - 99999
35、06 1252044 881 - or quality program. 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 requirements of the contract. manufacturing operations, is an acceptable practice to ascertai
36、n conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. The absence of any inspection requirements in the Sampling inspection, as part of * 4.2 Classification o
37、f inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3) b. Quality conformance inspection (see 4.4) * 4.3 the examin I. * 4.3.1 six stabil tools shal of the con irst article inspection. First article inspect tions and tests describ
38、ed in section 4.6 in the First article samples. The first three thrust on shall consist of order listed in table product i on. tags marked hooks and the first Zer hooks produced under each contract and fabricated from production be first article test samrles. The samPles shall be rem-esentative Devi
39、at by the reject truction, workmanship, components, and materials to be used during The hooks shall be plainly identified by securely attached, durable with the fol lowing information: on f acqu on. Sample submitted by (Name) (Date) for first article inspection in accordance with the requirements of
40、 MIL-H-21722B(AS and NAF Drawing under contract number om the standards of the first article sample shall be permitted only ring activity. Evidence of unauthorized change shall be cause for These samples shall be delivered, for inspection and testing, to the assigned test activity (see 6.5 and 6.3).
41、 Hooks shall be selected for testing in sets consisting of one thrust and two stabilizer hooks (see 6.2e and 6.29). 4.3.2 Correction of defects. Any defects discovered during the inspection and testing of the first article test samples shall be corrected by the contractor. Such measures as may be fo
42、und necessary to correct these defects shall likewise be incorporated in al 1 subsequent hooks offered for acceptance under contract. * 4.4 Qual i ty conformance inspection. Qual i ty conformance inspections shall consist of the following tests and examinations and as listed in the order in table II
43、I. a. Examination of product (see 4.5.2). b. Sampling inspection (see 4.4.1). c. Magnetic particle inspection (see 4.7). 4.4.1 Sampling inspection. Samples shall be selected by the Government inspector at random, from each production lot, in accordance with table II. Samples shall be forwarded to th
44、e assigned test activity and tested in the order listed in table III (see 6.2e and 6.2g). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-21722B(AS TABLE I. First article inspection. 1/ Total no. of hooks L/ 99 or less Title No. of samples se
45、lected Thrust I Stabi 1 i Zer 2 4 - Physi cal characteri stics(di sassembledl Physi cal characteri sti cs (assembled) Vi bration Life test Salt spray Static and repeat load tests - Des truc t i on tests 1 Applicable I Set 1 - Ti tie Physical characteristics (disassembled) Physical characteristics (a
46、s sembl ed) Life test Static and repeat load tests Destruction tests paragraph 1 4.6.1.1 I X Appl i cable par a g r aph 4.6.1 .i- 4.6.1 4.6.4 4.6.5 4.6.6 4.6.1 4.6.3 4.6.4 4.6.2 4.6.5 Set 1 X X X X X Set 2 Set 3 Set 4 X X X X X X X X Set 2 Set 3 X X X X X 1/ Hooks shall be selected for testing in se
47、ts consisting of one thrust and tio stabi 1 izer hooks. TABLE II. Quality conformance samples. 100 to 299 1 300 to 500 3 4 6 8 - 1/ When the lot size exceeds 500 hooks, the lot shall be subdivided into lots of 500 units and the selection for each subdivision shall be in accordance with the above tab
48、le. TABLE III. Quality conformance tests. 4.5 Inspection of materials and examination. * 4.5.1 Commercial materials. When materials are procured under commercially recognized non-Governmental specifications, such as SAE numbers, such specifications shall be complied with (see 6.3). 4.5.2 Examination
49、 of product. Each hook submitted for acceptance under contract shall be inspected visually, by the contractor, to ensure that it has been properly assembled and that the workmanship and the finishes are in accordance with the provisions of this specification. o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_I_-s- .- flIL-H-21722B m 9999906 3252046 654 m MIL-H-21722B(AS 4.6 Inspection methods. 4.6.1 Physical
