1、pe MIL-A-43L4bB Ib W 7777906 01195700 b I r-35-/3 b U i985 MIL-A-43146B SUPERSEDING MIL-A-43146A 9 March 1371 - MILITARY SPECIFICATION ACCESSORY SET, PARACHUTE, SCUBA ADAPTING This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1;l Scope. Thi
2、s document covers an accessory set consisting of the following components: - Support straps - SCUBA tank protector shield - Back strap - Waistband extension strap 2. APPLICABLE DOCUMENTS 2.1 Government documents. Unless otherwise-specified, the following documents, of the issue in effect on date of
3、invitationLfor bids or request for proposal, form a part of this document to the extent specified herein. Beneficial comments (recommendations, additions , deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Natick Research and Developme
4、nt Center, Natick MA 01760-5014 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 1670 THIS DOCUMENT CONTAINS - / PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license
5、from IHS-,-,-MIL-A-Ll314bB 16 M 7774906 0175701 P SPECIFICATIONS FEDERAL T-T-8 7 1 PPP-B-26 PPP-B-601 PPP-B-636 MI LI TARY MIL-1-6903 STANDARDS MILITARY MIL-STD-105 MIL-STD-129 MI L-STD-130 MIL-STD-147 DRAWING US ARMY NATICK 11-1-308 MIL-A-43146B - Twine, Fibrous Cotton, Wrapping - Bag, Plastic, (Ge
6、neral Purpose) - Boxes, Wood, Cleated-Plywood - Boxes, Shipping, Fiberboard - Ink, Marking (For Parachutes and Other Textile Items) - Sampling Procedures and Tables for Inspection by - Marking for Shipment and Storage - Identification Marking of U.S. Military Property - Palletized Unit Loads Attribu
7、tes RESEARCH AND DEVELOPMENT CENTER - Accessory Set, Parachute, SCUBA Adapting; Set, Complete (Copies of documents required by manufacturers in connection with specific acquisition functions should be obtained from from the contracting activity or as directed by the contracting officer,) 2.2 Other p
8、ublications, Unless otherwise specified, the following documents of theissue in effect on date of invitation for bids or request for proposal, form a part o this document to the extent specified herein. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 3951 - Standard Practice for Commercial Packa
9、ging (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Technical society and technical association documents are generally available or reference from libraries. They are also distributed among technical groups
10、and using Federal agencies. ) . 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-4334hB 3b 77777Oh 0375702 T MIL-A-43146B 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, th
11、e text of this document shall take precedence. 3. REQUIREMENTS 3.1 First article. When specified, a sample shall be subjected to, first article inspection (see 4.3, 6.2, and 6.4). 3.2 Materials. Materials when specified shall conform to the applicable documents and requirements specified herein. 3.2
12、.1 Marking medium. The marking medium shall be ink, color blue, No. 15103, conforming to MIL-L-6903. 3.2.2 Color. The webbing, tape, cloth, and the thread shall be dyed Olive Drab, and shall show fastness to weathering equal to or better than the standard sample. If no standard sample is availabIe,t
13、he color shall show good fastness to weathering. 3.3 Construction. The construction shall conform in all respects to No. Drawing 11-1-308 and as specified herein. 3.3.1 Type 301 stitching. Ends of all stitching shall be backstitched or overstitched not less than 1 inch. Thread tension shall be maint
14、ained so that there will be no loose stitching resulting in loose bobbin or top thread, or excessively tight stitching resulting in puckering of the material sewn. The- lock shall be imbedded in the materials sewn. 3.3.1.1 Repairs of type 301 stitching. Repairs of type 301 stitching shall be as foll
15、ows: a. When thread breaks or bobbin run-outs during stitching, the stitching shall be repaired by restarting the stitching a minimum of 1/2 inch back of the end of the stitching. - i/ b. Thread breaks or two or more consecutive skipped or run-off stitches noted during inspection of the packboard st
16、rap shall be repaired by overstitching, The stitching shall start a minimum of 1/2 inch in back of the defective area, continue over the defective area and continue a minimum of 1/2 inch beyond the defective area onto the existing stitching. Loose or excessively tight stitching shall be repaired by
17、removing the defective stitching, without damaging the materials, and restitching in the required manner. I/ - i/ When making the above repairs the ends of the stitching are not required to be backstitched. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
18、HS-,-,-MIL-A-q3LqbB Lb W 339330b 0135303 L c MIL-A-43146B I 3.3.1.2 Automatic stitching. Automatic stitching may be used to perform the O required stitch patterns provided the requirements for the stitch pattern, stitches per inch, size and type of thread are met; and at least three or more tying, o
19、verlapping or back stitches are used to secure the ends of the stitching, 3.3.1.3 Thread ends, All thread ends shall be trimmed to a length of not I more than 1/4 inch. I 4, QUALITY ASSURANCE PROVISIONS 3.4 Marking, Each component shall be marked for identification with the item name, part number, m
20、anufacturers name or identifiable trade mark, and year of manufacture conforming to MIL-STD-130. 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: 3.4.1 Straps. All straps shall be marked with 1/2 inch characters on the free end of each strap.
21、Marking medium shall be as specified in 3.2.1. 3.4.2 Shield, SCUBA tank protector. The markings shall be permanently indented with characters of such size as to be clearly legible. The markings shall be placed on the outer surface and centered at the center line location shown on the drawing, 3.5 Re
22、placement of defective components. During the spreading, cutting and manufacturing process, components having material defects or damages that are classified as defects in 4.4.3 shall be removed from production and replaced with non-defective and properly matched components. 3.6 WorkmanshiE. The com
23、ponents of the accessory set shall conform to the quality of product established by this document and the occurrence of defects shall not exceed the applicable acceptable quality levels. 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor i
24、s 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 or the performance of the inspection requirements specified herein, unless disapprove
25、d by the Government. The Government reserves the right to perform any of the inspections set forth in the document where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. a. b. First article inspection (see 4.3). Quality conformance inspection
26、(see 4.4). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-43146B 4.3 First article. When a first article is required (see 6.21, it shall be examined for the defects specified in 4.4.3 and 4.4.4. The presence of any defect shall be cause or r
27、ejection of the first article. 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 with al
28、l requirements of referenced documents unless otherwise excluded, amended, modified, or qualified in this document or applicable purchase document. 4.4.2. In-process inspection. Inspection of the components and subassemblies shall be made at appropriate stages of fabrication to determine conformance
29、 to the requirements of this document and the applicable drawing. reserves the right to exclude from consideration for acceptance components for which in-process inspection has indicated non-conformance. The Government 4.4.3 End item visual examination. The end item shall be examined for the defects
30、 listed in table I, The lot size shall be expressed in units of sets. The sample unit shall be one set. The inspection level shall be II and the acceptable quality level (AQL), expressed in terms of defects per hundred units, shall be 2.5 for major defects and 6.5 for total (major and minor combined
31、) defects . TABLE I. End item visual defects Classification Exam in e Defect Major Minor Design Any characteristic not in accordance with the specified requirements X Assembly of Incomplete set accessory set X Construction and Any component omitted loose, or other- workmanship wise not securely reta
32、ined X Cleanness Dirt, grease, oil, or foreign matter Stitches and stitching t Not type of stitch specified X Stitch pattern not as specified x minimum specified X One stitch less than minimum specified Two or more stitches less than One or more stitches in excess of maximum specified 5 X Provided b
33、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-q33qbB 3b 997990b 0375905 5 c MIL-A-43146B TABLE I. End item visual defects (contd) Classification Exami ne Defect Major Minor Stitches and stitching (contd) NOTE: Variation in the number of stitches per in
34、ch caused by the operator speeding up the machine and pulling fabric to sew over heavy places, heavy seams, or in turning corner shall be classified as follows: (a) Within the Major defect (b) Within the Minor defect classification - Minor defect classification - No defect Thread breaks and skipped
35、stitches not overstitched a minimum of 2 inch past ends of stitching defect X Loose tension, resulting in loosely exposed top or bobbin thread; or tight tension, resulting in tightness or puckering of material at stitch line Thread ends not trimmed Any row of stitching missing Needle chews Stitching
36、 pattern not complete Stitching run off at edge and not restitched in accordance with specified stitch pattern 1/2-inch (unless secured in a hem or by other stitching) Stitching ends backstitched less than Nylon webbing or Ends not seared where required duck (as Cut, tear, hole, or abrasion marks ap
37、pl i cab le) Thin or weak place Edges frayed, cut, or torn Edge beaded or corded Color not as specified Any splices (not continuous) X X X X X X X X X X X X X X I 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-43L4bB Lb 777770b 0395706 7 - M
38、IL-A-43146B TABLE I. End item visual defects (contd) C las s if ica t on Examine Defect Major Minor Hardware and shield (as applicable) Fractured, malformed, or bent x, Sharp burr or metal sliver X or otherwise nonadherent X area of no finish X Finish peeling, flaked, blistered, Any area of rust or
39、corrosion or Identification Missing, illegible, incomplete, marking or incorrect as specified Improper location or not applied X X 4.4.4 End item dimensional examinaticn. The end item shall be examined for conformance to the dimension specified on the drawing. Any dimension not within the specified
40、tolerance shall be classified as a defect. The lot size shall be expressed in units of sets. The sample unit shall be one set. The inspection level shall be S-3 and the AQL, expressed in terms of defects per hundred units, shall be 6.5. 4.4.5 Packaging inspection. An examination shall be made to det
41、ermine that preservation, packing, and marking comply with the section 5 requirements. Defects shall be scored in accordance with table II. The sample unit shall be one shipping container fully packaged. The lot size shall be the number of shipping containers offered for inspection at one time. The
42、inspection level shall be S-2 and the AQL, expressed in terms of defects per hundred units, shall be 4.0. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-33LlbB Lb W 777470b 0375707 7 W MIL-A-43146B TABLE II. Packaging defects Examine Defect
43、Marki1.g (interior Omitted; incorrect; illegible; improper size, location, and exterior sequence, or method of application. container) Ma ter i a 1 s Werkmanship Component missing, damaged, defective, or not as specified, Inaequate application of components such as incomplete closure of container fl
44、aps, loose strapping or taping, inadequate stapling. Bulged or distorted container. Contents (exterior Number per container not as specified. and interior container) 4.4.6 Palletization examination. An examination shall be made to determine that the palletization complies with the section 5 requirem
45、ents. be scored in accordance with table III. The sample unit shall be one palletized unit Load fully packaged, loads in the inspection lot. The inspection level shall be S-1 and the AQL, expressed in terms of defects per hundred units, shall be 6.5. Defects shall The lot size shall be the number of
46、 palletized unit TABLE III. Palletization defects Exami ne Defect Finished dimensions Length, width, or height exceeds specified maximum requirement. Palletization Not as specified. Pallet pattern not as specified. Interlocking of loads not as specified. Load not bonded with required straps as speci
47、fied. Weight Exceeds maximum load limits. Marking Omitted; incorrect; illegible; of improper size, location, sequence, or method of application. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-q334bB 16 m 9999906 0395708 O m MIL-A-43 146B 5.
48、PACKAGING 5.1 Preservation. Preservation shall be level A or Commercial, as specified (see 6.2). 5.1.1 Level A. 5.1.1.1 Unit packing. Each strap shall be compactly folded and securely tied with twine conforming to type I or IL, 8-ply of T-T-871. The four folded and tied straps required for one acces
49、sory set shall be unit packed in 8 close- fitting, 0,0002-inch thick polyethylene bag conforming to type I or II, style 1 or 2 of PPP-B-26. Prior to or during the closure operation, excess air within the bag shall be expelled. The bagged straps shall be securely tied to the inside surface at the center line of the protector shield with the specified twine. 5.1.1.2 Intermediate packing. Two accessory set
