1、MIL-C-43303C 3 7977706 0433655 5 MIL-C-43303C 22 May 1990 SUPERSEDING MIL-C-43303B 8 November 1971 MILITARY SPECIFICATION CORD, ELASTIC COTTON This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers elastic co
2、rd encased within a braided cotton cover. 1.2 Classification, The cord shall be of the following classes as specified (see 6.2): Class 1 - General purpose, Class 2 - Special purpose. 2, APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following speci
3、fications, standards, and handbooks form a part of this document to the extent specified herein. Unless 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 so
4、licitation (see 6.2). I I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be used in improving this document should be addressed to: U.S. Army Natick Research, Development, and Engineering Center, Natick, MA 01760-5014 by using the Standardization Documen
5、t Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8305 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-43303C
6、 3 W 999990b 043365b 7 W MIL-C-43303C SPECIFICATIONS FEDERAL UU-T-8 1 - Tags, Shipping and Stock, MI LI TARY MIL-C-3131 - Cordage; Packaging Of. STANDARDS FEDERAL FED-STD-191 - Textile Test Methods. FED-STD-595 - Colors. MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attribu
7、tes. (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094,) 2.2 Non-Government publications. The following document forms a part of t
8、his 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 the documen
9、ts cited in the solicitation (see 6.2). AMERICAN SOCIETY OF TESTING AND MATERIALS (ASTM) D 573 Rubber - Deterioration in An Air Oven (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187). (Non-Government standard
10、s and other publications are normally available from the organizations that prepare or 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 document and t
11、he 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. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL
12、-C-Y3303C 3 R 7799906 0433657 9- 3 REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.3) in accordance with 4.3. 3.2 Standard sample. The dyed cord shall match the standard sample for shade and shall be equal to or better than the
13、 standard sample with respect to ali characteristics for which the standard sample is referenced (see 6.4). 3.3 Government and supplier purchases. The requirements specified in 3.8 and 3.9 apply only to,cord purchased directly by the Government. All other - requirements apply to cord purchased by a
14、contractor as a component for an end item and to cord purchased directly by the Government. 3.4 Material. It is encouraged that recycled material be used when practical as long as it meets the requirements of this specification. 3.4.1 Cotton. The cotton shall be of suitable staple length and grade t
15、o meet the requirements of this specification. 3.4.2 Elastic strands. The elastic strands shall be made of compounded natural rubber, synthetic rubber, or a mixture thereof. 3.5 Color. The color of the cord shall be natural or dyed as specified (see 6.2). When dyed cord is specified the cotton yarn
16、shall be dyed before braiding. The use of dyes and compounds containing elementary sulfur capable of oxidation to sulfuric acid is prohibited, The dyestuff shall be chosen and applied so that the dyed and finished cotton yarn shall contain no more labile sulfur than shown by the standard sample when
17、 tested as Specified in 4.4.1. When a standard sample is not available the dyed and finished cotton yarn shall show no more than a slight trace of labile sulfur as defined in the test method when tested as specified in 4.4.1. When Camouflage Green 483 is specified, the color shall approximate color
18、chip 34094 of FED-STD-595 (see 2.1.1 and 6.3). 3.5.1 Colorfastness. The dyed cord shall show fastness to laundering (after 3 cycles) equal to or better than the standard sample or equal to or better than a rating of “good“ when tested as specified in 4.4.3. 3.5.2 Matching, The color of the dyed cord
19、 shall match the standard sample when viewed under filtered tungsten lamps that approximate artificial daylight and that have a correlated color temperature of 7500 2 200 K, with illumination of 100 + 20 foot candles, and shall be a good match to the standard sample under incandeccent lamplight at 2
20、300 f 200 K. 3.6 Physical requirements. The finished cord shall conform to the physical requirements specified in table I when tested as specified in 4.4.3. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-43303C 3 m 9799706 0433b5 O M TABLE I
21、. Physical requirements and construction Cot ton Weight yarn size Diameter oz/lin. yd. Elastic Cover 2 2 counts Picks per Rubber strand inch (minimum) strands carriers cover core inch (min) gage (max) 3/16 2 O. 18 7 16 carriers 20/2 20/1 26 36 1/32 1 end per carrier -or- 8 carriers 2 ends per carrie
22、r 3.6.1 Core. The core shall be composed of seven ends of rubber, each end shall be individually wrapped first with.four ends of 20/1 cotton yarn, S or Z twist direction, and overwrapped with one end of 20/1 cotton yarn in the opposite twist direction. 3.6.2 Cover. The cover shall be braided over th
23、e core in a basket weave construction with the carriers braiding in pairs. 3.7 Elongation and set. 3.7.1 Class 1. The class 1 cord shall have an elongation in the* range of 117 through 143 percent when tested as Specified in 4.4.3. 3.7.2 Class 2. 3.7.2.1 Initial elongation. The class 2 cord shall ha
24、ve initial elongation in the range of 117 through 143 percent when tested as specified in 4.4.3. 3.7.2.2 Elongation after accelerated aging. The change in elongation of the class 2 cord after acceleratedaaging shall be not more than 20 percent when tested as specified in 4.4.3. 3.7.2.3 Low temperatu
25、re elongation. The class 2 cord after subjection to a temperature of -400F. shall retain not less than 20 percent of its initial elongation when tested as specified in 4.4.3. 3.7.2.4 Permanent set. The class 2 cord shall have an initial permanent . set of not more than 8.0 percent when tested as spe
26、cified in 4.4.3. c 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-43303C 3 999770b Oq33bC7 2 MIL-C-43303C 3.7.2.5 Permanent set after accelerated aging. The change in permanent set of the class 2 cord after accelerated aging shall be not mor
27、e than 20 percent when tested as specified in 4.4.3. 3.8 Put-ug. Unless otherwise specified (see 6.2), the cord shall be put-up on spools (reels), flat head type, containing 144 yards + 2 yards, with not more than three pieces per spool, and no one piece less than TO yards in length. The cord shall
28、be wound on the spools (reels) so that each turn and layer is free from entanglement, 3.9 Identification. Each spool (reel) of cord shall have a ticket (identification tag) or label attached to it for identification purposes. ticket shall conform to the requirements for type B, class 1, size 4 or 5
29、of UU- T-81. The ticket shall be made of not leas than 15-point paper stock and shall have a minimum tearing resistance of both directions (total) of 850 grams when tested as specified in UV-T-81. When labels are used, the label shall be attached in such a manner as to remain in place and be clearly
30、 legible until all cord has been removed. The ticket or label shall be legibly printed, stamped or typed with water insoluble ink. Handwritten entries shall be prohibited. The ticket or label shall contain the following information: The Stock number Item description Specification number Length Contr
31、act number and date Date of manufacture Contractors name 3.10 Workmanship. The fabricated cord shall conform to the quality of product established by this specification. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection, Unless otherwise specified in the contract or purchase order, t
32、he 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 inspection require
33、ments specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 5 Provided by IHSNot for R
34、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-43303C 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or qu
35、ality program. The absence of any inspection requirements in the specificEtion 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. Sampling inspection, as part of man
36、ufacturing 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 accept defective material. 4.1.2 Responsibility for dimensional require
37、ments. Unless otherwise specified in the contract or purchase order, the contractor is responsible for ensuring that all specified dimensions have been met. Whe dimensions cannot be examined on the end item, inspection shall be made at any point, or at all points in the manufacturing process necessa
38、ry to assure compliance with.al1 dimensional requirements. 4.1.3 Certificates o,f compliance. When certificates of compliance are submitted, the Government reserves the right to inspect such items to determine the validity of the Cer-ification. .4.2 Classification of inspection. The inspection requi
39、rements specified herein are classified as follows: a. b. First article inspection (see 4.3). Quality conformance inspection (see 4.4). 4.3 First article inspection. When a first article is required (see 3.1 and 6.2, it shall be examined for the defects specified in 4.4.2 and shall be tested for the
40、 characteristics specified in 4.4.3, 4.4 Quality conformance inspection. Unless otherwise specified, sampling for inspection shall be performed in accordance with MIL-STD-105. 4.4.1 Component and material inspection. In accordance with 4.1, components and materials shall be inspected in accordance w
41、ith all the requirements of referenced documents unless otherwise excluded, amended, modified or qualified in this specification or applicable purchase document. 4.4.1.1 Component and material certification, A certificate of compliance may be acceptable as evidence that the characteristics listed in
42、 table II conform to the specified requirements. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-43303C 83 93979Ob 0433bbL O MIL-C-43303C TABLE II. Component and material certification Characteristic Paragraph reference Test method Elastic st
43、rands: Ma ter ia 1 Gage Cotton yarns: Ma te r ia 1 Labile sulfur Yarn sizes 3.4.2 Table I 3.4.1 3.5 Table I - 4.6.6 1200 i/ 2020 i/ 4021 i/ - - l/ Refers to test method of FED-STD-191. 4.4.2 End item examination. 4.4.2.1 Yard-by-yard examination. The cord shall be examined for the defects listed in
44、table III. All defects found shall be counted regardless of their proximity to each other. A continuous defect shall be counted as one defect for each linear yard or fraction thereof in which it occurs, The lot size shall be expressed in yards. The sample unit shall be one linear yard. The inspectio
45、n level shall be I, and the acceptable quality level (AQL), expressed in terms of defects per hundred units, shall be 2.5. The number of spools from which the sample yardage is to be selected shall be in accordance with table IV. The sample yardage shall be apportioned equally among the selected spo
46、ols (reels). TABLE III. End item visual defects Core not completely covered Any cut or tear Broken or missing end or carrier Spot or stain L/ Abrasion mark, resulting in a weak place Unevenly braided resulting in open place, break in continuity of braid or so t spot, - i/ Clearly visible at normal i
47、nspection distance (approximately 3 feet). 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - VIL-C-43303C 83 M 7777906 0433bb2 2 MIL-C-43303C 4.4.2.2 Overall examination, The elastic cord shall be examined for the defects listed below. Each defect
48、 listed shall be counted not more than once in each spool examined, The sample size shall be the applicable number of spools indicated in table IV. Each spool in the sample shll be examined over its entire length. The lot shall be rejected if the total number of defects in the sample exceeds the app
49、licable acceptance number specified in table IV. Defects Offshade, mottled, or uneven color, when dyed. Not clean throughout. Objectionable odor, Improperly wound resulting in kinking, knotting, entangling or slippage during unwinding or otherwise affecting free unhampered unwinding of cord. TABLE IV. Sample size Lot size in yards Sample size in spools i/ Acceptance number 1,200 or less 3 O 1,201 up to and including 3,200 5 O 3,20
