1、MI L-C-5651 D 26 September 1985 SUPERSEDING MI L-C-5651 C 2 March 1977 MILITARY SPECIFICATION CORD, ELASTIC; EXERCISER AND SHOCK ABSORBER, FOR AERONAUTICAL US This specification is approved for use by al 1 Departments and Agencies of the Department of Defense. ? - 1. SCOPE 3- 1.1 Scope. This specifi
2、cation covers the requirements for three types of elastic shock absorbing and exerciser cord for aeronautical use. 1 .E Classification. The elastic cord shall be furnished in the following types, as specified (see 6.2.1): TY Pe Description I Straight cord with double braided cover (shock absorbing).
3、 II III Endless ring (Bungee) W cover (shock absorbing) i th double braided Straight cord with sing (exerci ser cord). le braided cover 2. APPLICABLE DOCUMENTS 2.1 Government documents. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improvin
4、g this document should be addressed to: Systems Engineering and Standardization Department (Code 931, Naval Air Engineering Center, Lakehurst, NJ 08733, by using the self-addressed Standardization Document Improve- ment Proposal (DD Form 1426) appearing at the end of this document or by letter. L FS
5、C 8305 DISTRIBUTION STATEMENT A, Approved for public release; distribution is unlimited. ,“ . THIS DOCUFilENT CONTAINS /y PAGES : Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-5651D 2.1.1 Specifications, standards, and handbooks. Unless other
6、wise specified, the following specifications, standards, and handbooks of the issue listed in that issue of the Department of.Defense Index of Specifications and Standards (DoDISS) specified in the solici tation form a part of this specification to the extent specified herein. SPEC1 FICATIONS FEDERA
7、L “M-A-260 - Adhesive, Water-Resistant, (For Sealing Water- proofed Paper). PPP-6-636 - Boxes, Shipping, Fiberboard. PPP-B-1055 - Barrier Material, Waterproofed, Flexible. PPP-T-60 - Tape, Packaging, Waterproof. PPP-T-76 - Tape, Packaging, Paper (For Carton Seal ing). MILITARY MIL-B-1 31 - Barrier M
8、aterials, Watervaporproof, Flexible, Heat-Seal ab1 e. STANDARDS MILITARY MI L-STD- 105 - Sampling Procedures and Tables for Inspection MIL-STD-129 - Marking for Shipment and Storage. by Attr i butes. (Copies of specifications, standards, handbooks, drawings, and publications required by manufacturer
9、s in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting off i Cer. 1 2.2 Other pub1 icatlons. The fol lowing document forms a part of this specification to the extent specified herein. The issues of the documents which ar
10、e indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. UNIFORM CLASSI FICATION COMMITTEE, AGENT Uniform Freight Classification Rules (Application for copies should be addressed to the Uniform Classification Committee, Room 1106, 222 Sout
11、h Riverside Plaza, Chicago, IL 60606.) (Industry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies. 1 2.3 Order or precedence. In the event of a conflict between the text of this
12、specification and the references cited herein, the text of this specification shall take precedence. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3. REQUIREMENTS 3.1 First article. When specified, samples shall be subjected to first article insp
13、ection (see 4.3 and 6.3). 3.2 Materials. 3.2.1 Strands. The strands shall be made from natural, synthetic, or a mixture thereof of synthetic natural rubber compound having such qualities that, when encased in a braided cover (Types I and II double braided, Type III single braided), the finished cord
14、 shall conform to the requirements specified herein. Reclaimed rubber shall not be used. 3.2.2 Yarns. The yarns for the braid shall be spun from a good grade and staple of cotton that shall be free of imperfections and impurities. 3.3 Design and construction. The elastic shock absorber cord (Types I
15、 and II) and the elastic exerciser cord (Type III) shall be composed of multiple strands tightly encased within a double layer of cotton braid for Types I. and II and a single layer of cotton braid for Type III. 3.3.1 Strands. The strands shall be continuous throughout the length of the cord and, in
16、 a given cord, shall be of uniform size and configuration. Strands shall be thoroughly treated with soapstone or talc to prevent them from adhering to each other in the finished cord. 3.3.2 Braid. All cord shall be braided with asufficient number of ends that, whenthecord is elongated 100 percent, t
17、he braid shall be tight and prevent dirt from entering between the individual yarns of the braid. The minimum number of ends in the braid for all cords shall be as specified in Table I. 3.3.2.1 Type I braid. The Type I cord shall be double braided from naturdl color cotton ply yarns. The outer braid
18、 shall consi st of glazed (polished) yarns and the inner braid shall consist of soft finished yarns. 3.3.2.2 Type II braid. Type II bungee ring cord shall be double braided from natural color cotton ply yarns. The inner and .outer braid shall be fabri cated from glazed yarns. 3.3.2.3 Type III braid.
19、 Type III shall be a single cotton braid consisting of ply yarns of a colorfast color specified by the acquisition activity (see 6.2.1 1. 3.4 Size and tolerance. 3.4.1 Diameters. The elastic cord shall be furnished in the diameters specified in Table I. The tolerances, as applicable, shall be as fol
20、lows: Types I and II: +.047, -0 inch (+0.119, -0 cm). Type III: +.031, -0 inch (+0.079, -0 cm). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-SbSLD 83 7779706 0375226 7 MIL-C-5651D 3.4.2 Lengths. Unless otherwise specified (see 6.2.1). the
21、cord lengths shall be as specified In Table II. 3.5 Physical properties. The physical properties of the cords shall conform to Tab1 e III. Type I I bungee ri ng cord shall meet al 1 the requirements for Type I cord in addi tion to those for Type II. 3.6 Age limitation. Elastic cord furnished under t
22、his specification shall be not more than six (6) months old from date of manufacture to date of delivery (see 6.2.2). . 3.7 Product identification. The elastic cord shall be identified as to type and date of manufacture by using dyed yarns as part of the outer braid. Type I cords shall be identified
23、 by two dyed ends indicating year of manufacture (see 3.7.1.1) and a third indicating quarter of manufacture (see 3.7.1.2). Type III cord shall utilize three dyed ends for the year (see 3.7.1.1) and a fourth dyed end for the quarter of manufacture (see 3.7.1 .2). The identification ends shall be sep
24、arated by one or two natural color or 01 ive drab dyed ends. 3.7.1 Identification yarn colors. 3.7.1.1 Year of manufacture. The following colorfast identification yarn colors shall be used to distinguish the year of manufacture: 1982 - Red 1983 - Blue 1984 - Yellow 1985 - Black 1986 - Green For succ
25、eeding years, this cycle shall be repeated. 3.7.1.2 Quarter of manufacture. The following colors shall be used to distinguish the quarter year of manufacture: January through March - Red April through June - Blue July through September - Green October through December - Yellow 3.8 Workmanship. Workm
26、anship shall be in accordance with high-grade practice covering this class of material. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-5651D 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the
27、 contract or purchase order, the contractor is responsible for the performance of all inspection requirements 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 inspection re
28、quirements specified herein, unless disapproved by the Government. The Government reserves the right to perfom any of the inspections set forth in the specification where such inspections are deemed necessary to assure suppl i es and servi ces conform to prescribed requirements. .8 4.2 Classificatio
29、n of inspection. 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 First article inspection. The first article inspection of the cords shall consist of tests and examinations for all the req
30、uirements of this specification. 4.3.1 First article samples. Unless otherwise specified, as soon as practicable after the award of the contract or order, the contractor shall . submit 80 feet (24 meters) for each type and size ordered in the contract. The samples shall be representative of the cons
31、truction, workmanship, components and materials to be used during production. When a contractor is in continuous production of these cords from contract to contract, submission of further first article inspection samples, on the new contract, may be waived at the discretion of the acquiring activity
32、 (see 6.2.1). Approval of the ftrst article inspection samples or the waiving of the first article inspection does not waive the requirements for performing the quality conformance inspection. The first article inspection samples shall be furnished .to the Government as directed by the contracting o
33、fficer (see 6.2.1). The first article inspection sample shall be identified by securely attached tags or labels durably marked with the following information: Sample for First Article Inspection CORD: ELASTIC, EXERCISER AND SHOCK ABSORBER, Type and size as applicable Name of manufacturer Name of dis
34、tributor (if applicable) Product designation (manufacturers) Date of manufacture Submitted by (name) (date) for first article inspection in accordance with the requirements of MIL-C-5651D. FOR AERONAUTICAL USE 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fro
35、m IHS-,-,-NIL-C-SbSLD 8.3 W 9977706 0375228 2 MIL-C-5651D 4.3.2 Test report. Two copies of the contractors test report, containing complete test data for the end item and for each component required herein an referring specifically to the applicable paragraphs, shall be submitted with the first arti
36、cle inspection sample. 4.4 Qual i ty conformance inspection. 4,4.1 Lot formation. Unless otherwise specified, a lot shall consist of all the elastic cord of the same type and size produced under essentially the same manufacturing condition and from the same material, at one plant, and ready for insp
37、ection at the same time. Unless otherwise specified, the lot size shall be expressed as the total number of feet (ml in the lot. 4.4.2 Sampling. 4.4.2.1 Dimensional. The unit of product for this inspection shall be one coil, core, or spool of cord. The sample size shall be as specified in Table IV.
38、Each unit shall be examined as specified in 4.4.3.1. 4.4.2.2 Visual. The sample size shall be determined in accordance with Inspection Level I of MIL-STD-105. The unit of product shall be one (1 1 fwt (0.3 ml. An approximately equal number of units of product from the cores, coils, or spools, select
39、ed as specified in 4.4.2.1, shall be used for the visual sample. Each unit shall be examined as specified in 4.4.3.2. 4.4.2.3 Physical properties. The sample size shall be determined in accordance with Inspection Level S-1 of MIL-STD-105. The unit of product shall be 10 feet (3 ml. Each unit shall b
40、e examined as specified in 4.4.3.3. 4.4.2.4 Packaging. A quantity of shipping containers prepared for delivery, just prior to closure, shall be randomly selected from each lot in accordance with Inspection Level I of MIL-STD-105. The lot size for purposes of sampling shall be the number of shipping
41、containers in the lot. Examination shall be as specified in 4.4.3.4. 4.4.3 Inspection procedure. 4.4.3.1 Dimensional. Units of product selected as specified in 4.4.2.1 shall be examined for length as follows: Any individual length found to be less than the specified minimum length (50 feet) (15 m) o
42、r any total length less than 2 feet (0.6 m below the length specified on the package shall be considered a defect. The diameter of the cord shall be measured at least 5 times during the length measurement. The acceptance number shall be as specified in Table IV. In addition, when the actual total le
43、ngth in the entire sample is less than the total specified on the packages, the entire lot shall be considered unacceptable. 4.4.3.2 Visual. Unlts of product selected as specified in 4.4.2.2 shall be exarnlned to the requirements specified in Table V. The Acceptable Quality Level (AQL) shall be 0.15
44、 for major and 1 .O total combined (major plus minor) defects per 100 units of product (feet) (30 units of product ml. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-O 4.4.3.3 PhysfcaT properties. Each unit of product selected as specified in 4.4.
45、2.3 shall be examined to the requirements specified in Table VI. Nonconformance of any unit of product to a single applicable requirement shall be cause to reject the lot represented by the sample. 4.4.3.4 Packaging inspection, Shipping containers selected as specified in 4.4.2.4 shall be examined f
46、or conformance to Table VI1 and the requirements of Section 5 of this specification. The AQL shall be 2.5 percent defective. In addition, shipping containers fully prepared for delivery shall be examined for closure defects. 4.5 Test condi t ions. 4.5.1 Standard conditions. Standard conditions shall
47、 be 23 2 3C (73.4 2 5F) and a relative humidity of 50 5 5 percent. 4.5.2 Conditioning. Unless otherwise specified herein, all test fixtures and measurement gauges shall be maintained at standard conditions for 24 hours prior to tests. In addition, all cord shall be conditioned for at least 7 days fr
48、om the date of manufacture before testing. 4.5.3 Reporting of test results. Unless otherwise specified in the applicable test method, test results shall be reported as the average of all values obtained. However, each individual value shall be noted in the test report and shall conform to the specif
49、ied requirement. When comparison of initial and after conditioning values are indicated, the comparison shall be determined on the reported average. 4.6 Test methods. 4.6.1 Construction details. 4.6.1.1 Visual. The elastic cord shall be carefully examined to determine conformance with the requirements for materials, workmanship, construction, and marking (year and quarter of manufacture). 4.6.1.2 Dimensions. The diameter of the cord shall be measured at 5 dif
