DLA A-A-55223-1993 FASTENER PLASTIC FOR EQUIPAGE ITEMS《塑料紧固装备》.pdf

1、A-A-55223 H 9999974 0145374 T76 A-A-55 2 2 3 July 13, 1993 COMMERCIAL ITEM DESCRIPTION FASTENER, PLASTIC, FOR EQUIPAGE ITEMS The General Services Administration has authorized the use of this Commercial Item Description in preference to MIL-F-43514. Abstract. This Commercial Item Description covers

2、the requirements for one type of plastic fastener for equipage items, such as ammunition pouches, tool carriers, and collapsible canteen covers. The fastener is intended only for attachment to materials having a compressed thickness of 0.010 inch minimum and 0.050 maximum. Classification. The fasten

3、er is of one type and class. Salient Characteristics. The fastener shall be composed of the following molded parts: latch, latch receptacle, locking clip for latch, and locking clip for latch receptacle. dimensions of the fastener parts shall be in accordance with Figure 1. o The design and The fast

4、eners setting pinch shall be understood as clinch of the latch-clip assembly and the receptacle. The clinch of the latch and its clip and the receptacle and its clip shall each withstand a minimum pull of 120 pounds when tested as specified in the End Item Performance Testinq section. Beneficial com

5、ments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Defense Personnel Support Center, Clothing and Textiles Directorate, Attn: DPSC-FSSD, 2800 South 20th Street, Philadelphia, PA 19101-8419, by using the Standard

6、ization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8465 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling ServicesA-A-55 2 2 3 The color of the finished fastener shall

7、be black. The fastener parts shall have a lusterless or dull finish on all surfaces, unless Figure 1 indicates otherwise. The finish shall be * produced as a result of the molding operation and not by application of any protective coating, lacquer, or other materials. Materials. conforming to type I

8、, class 2 of L-P-392 except that the electrical property requirements shall not apply. Clean, unburned plastic material in the form of imperfect parts, sprues, runners or other scraps of the same composition, produced in the molding or finishing operation, may be reground and mixed with the material

9、. Recycled material may be used. The molding material may contain a surface lubricant. All parts shall be made from acetal molding compound Markinq. The fastener shall be marked by an embossed molded-in process with manufacturers name or trademark, and the year of manufacture. those surfaces which a

10、re outermost when the fastener is in use. The letter size shall be approximately 3/32 inch in height, and the characters shall be raised approximately 0.007 inch. Workmanship. The parts shall be clean, smooth, and free from cracks, dirt, flash, and surface defects such as splay and jetting marks. su

11、rface. The posts on the latch and latch receptacle shall be fully formed and free from any imperfection, which may interfere with their locking engagement, when assembled to the locking clips. - The marking shall be located on any surface except All gates shall be trimmed flush with the molding Prod

12、uct Demonstration Model. When required, offerers shall submit samples of their intended production. The Product Demonstration Model will consist of units independently developed. Product Demonstration Models will be analyzed and evaluated by the government. Evaluation criteria and basis for award ar

13、e contained in the solicitation. Product Demonstration Models will be retained by the government. One (1) Product Demonstration Model approved by DPSC under the resultant contract will serve as a manufacturing standard for the corresponding production items delivered under this contract. Offerers ar

14、e advised that the Product Demonstration Model does not relieve the successful offerer of his responsibility to perform in accordance with the Commercial Item Description specified above. Quality Assurance Certification; offered meets the salient characteristics of this description and that the prod

15、uct conforms to the producers own drawings, specifications, standards and quality assurance practices. The government reserves the right to require proof of such conformance prior to the first delivery and thereafter as may be The contractor shall certify that the product b 2 Licensed by Information

16、 Handling ServicesA-A-55223 9999974 OL45Lb 849 A-A-55 2 2 3 0 otherwise provided for, under the provisions of the contract. Reliance on contractor QA systems shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the government for acceptance co

17、mply with all requirements of the contract. Examination. Fastener lots shall be inspected in accordance with “Sampling Procedures and Tables for Inspection by Attributes“, ANSI/ASQC 21.4, published by the American Society for Quality Control. I Visual Examination. The fasteners shall be examined for

18、 the defects listed below. of fastener. The sample unit is one fastener. The inspection level shall be I, and the acceptable quality level (AQL), expressed in terms of defects per hundred units, shall be 1.5. The lot size shall be expressed in units Defects. defects: The fasteners shall be examined

19、for the following Design/Construction Fastener assembly not in compliance with Figure 1; any part broken, cracked, chipped, distorted, twisted, or malformed; any dirt or flash; any deep scratch or gouge; gates not trimmed as specified; unsmoothed surface; any pit, void, crazing, air pocket, blister,

20、 or imbedded foreign matter affecting serviceability; evidence of splay or jetting marks; latchjreceptacle mating failure Color and finish Wrong color, unspecified finish, evidence of coating; density or appearance of material not uniform Marking Omitted; incorrect; illegible; improper size, locatio

21、n, or method of application Dimensional Examination. The finished dimensions shall conform to Figure 1. Any dimension that is not within the established tolerance shall be classified as a defect. be one fastener; the inspection level shall be S-2 and the AQL, expressed in terms of defects per hundre

22、d units, shall be 1.5. Packaqinu Examination. The fully packaged shipping containers shall be examined in accordance with defects listed below. The lot size shall be the number of shipping containers in the inspection lot. The inspection level shall be S-2 and AQL, expressed in terms of defects per

23、hundred units, shall be 1.0. The sample unit shall I Licensed by Information Handling ServicesA-A-55223 74 OL45177 705 A-A-55 2 2 3 EXAMINE DEFECT Marking Omitted; incorrect; illegible; (exterior and interior) of improper size, location, or method of application Materials Workmanship Content Palleti

24、zation Any component missing, damaged, or not as specified Inadequate application of components, such as: incomplete closure of container flaps, loose strapping, improper taping, or inadequate stapling Number of items in container is more or less than required NSN shown on one or more items not as s

25、pecified on shipping container Length, width, or height exceeds specified maximum requirements Pallet type not as specified Load not bonded as specified Recrulatom Requirements. use recovered materials in accordance with Public Law 94-580 to the maximum extent practicable. The offeror/contractor is

26、encouraged to End Item Performance Testinq. The fastener shall be tested for strength of the clinch in accordance with the procedure below. The lot size shall be expressed in units of one complete fastener. The sample unit for this test shall be one complete fastener. The inspection level shall be S

27、-2, and the lot shall be unacceptable if any sample unit fails to meet the requirements specified below. All test reports shall contain the individual values utilized in expressing the final result. Test specimens shall be conditioned at 73.5O + 2OF and 50 percent - + 4 percent relative humidity for

28、 24 hours prior to the test, and the test shall be performed under these conditions. 4 Licensed by Information Handling ServicesA-A-55223 = 9979974 0145178 b11i A-A-55 2 23 a Assemble the latch receptacle and its locking clip with two pieces of brass strip (0.010 inch thick) stock, as shown in figur

29、e 1. The brass strips shall be pre-punched before assembling. Clinch the posts of the latch receptacle by hot or cold heading by the same method to be used in the manufacture of top of the clinched posts shall be below the surface of the locking clip. The specimen for testing the clinch of the latch

30、 shall be prepared in the same manner as that for the latch receptacle except that the latch shall be cut off one inch from the top and the top part (including the posts) of the latch shall be used in the-test. The “setting pinch,“ after heading, for the latch with latch locking clip and the latch r

31、eceptacle with latch receptacle locking clip under this test shall be 0.310 5 0.004 inch and 0.625 & 0.004 inch, respectively. The “setting pinch“ is the measurement at which fastener units are correctly attached, and is obtained by adding the compressed thickness of any given foundation (in this ca

32、se, brass strips) to the “basic pinch.“ The “basic pinch“ of a fastener unit (latch with latch locking clip or latch receptacle with latch receptacle locking clip) is the measurement, made by micrometer, from the exposed surface of the latch or latch receptacle to over the rolled ends of the posts a

33、s these parts are brought into contact with their locking clips in the normally applied relationship. The “basic pinch“ for the latch with locking clip and the latch receptacle with locking clip is 0.290 inch and 0.605 inch, respectively. The die that clinches the posts shall be a double tested roll

34、ing die, common to both the latch and latch receptacle. With the test assembly in a horizontal position, bend the two ends of one of the brass strips upward so that they touch and clamp these ends together in the upper clamp of a tensile testing machine. Bend the two ends of the other brass strip do

35、wnward so that they touch and clamp these ends in the lower clamp of the tensile tester. The distance between the jaws at the beginning of the test shall be four inches and the rate of jaw separation shall be twelve inches per minute. Report to the nearest pound the force indicated on the machine at

36、 the time of rupture of the assembly. Any specimen rupturing (completely separating) at a force below 120 pounds shall be considered to have failed the test. I the equipage items on which the fastener will be attached. The a Certificates of Conformance. Certificates of Conformance shall be provided

37、to government Quality Assurance Representative, when this component is designated in a government procured end item. Preservation, Packing, and Markinq. The preservation, packing, and marking shall be as specified in the contract or order. 5 Licensed by Information Handling ServicesA-A-55223 m 99999

38、74 0345379 558 = A-A-55 2 2 3 Source of Government Documents. documents are available from: Copies of Military and Federal Standardization Documents Order Desk Bldg. 4D 700 Robbins Avenue Philadelphia, PA 19111-5094 Sources of Nonqovernment Documents. ANSI/ASQC 21.4 - Sampling Procedures and Tables

39、For Inspection By Attributes (Applications for copies should be addressed to American National Standards Institute, 1430 Broadway, New York, NY 10018- 3308. ) Custodian: Army - GL Navy - NU Review Activity: Navy - MC Civil Agency Coordinating Activity : GSA - FSS Preparing Activity: DLA - CT , Project No. 8465-0155 6 Licensed by Information Handling ServicesA-A-55223 m 7777774 Ol45LBO 27T m 4 A-A-55 2 2 3 .w a 7 Licensed by Information Handling Services