1、specification to the extent specified herein: SPECIFICATIONS FEDERAL T-C-571 - Cords, Cotton; General and Special Purpose, V-T-285 - Thread, Polyester Sash and Venetian Blind KK-L-154 - Leather, Cattlehide, (Bag and Case) TT-P-595 - Preservation Coating, Canvas Beneficial comments (recommendations,
2、additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US Army Natick Research and Development Command, Natick, MA 01760 by using the self-addressed Standardization Document Improve- ment Proposal (DD Form 1426) appearing at the end of thi
3、s document or by letter. FSC 8340 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-43309C UU-P-268 ccc-0419 ccc-D-950 DDD-L-20 PPP-B-636 MILITARY MIL- C-49 6 MIL-W-5 30 MIL-L-1709 MIL-H-9890 MIL-G-16491 MIL-T-43566 STANDARDS FEDERAL FED-STD-751
4、MILITARY MIL-STD-105 MIL-STD-129 DRAWINGS MIL-T-Y3307C 83 7797906 OY47LI7L 5 = - Paper, Kraft, Wrapping - Cloth, Duck, Cotton, Unbleached, Plied-Yarns, Army and Numbered - Cotton Cloths - Label, For Clothing, Equipage, and Tentage, (General Use) - Boxes, Shipping, Fiberboard Dyeing and Aftertreating
5、 Processes for - Clips, End, Strap - Webbing, Textile, Cotton, General Purpose, - Lines, Tent - Hardware, Individual Load Carrying Equipment; and - Grommet, Metallic - Tape, Textile, Cotton, General Purpose, Natural or in Colors Natural or in Colors Hardware, Biscellaneous - Stitches, Seams, and Sti
6、tching8 - Sampling Procedures and Tables for Inspection - Marking for Shipment and Storage by Attributes US ARMY NATICK RESEARCH AND DEVELOPMENT COMMAND 5-10- 3 8 - Tarpaulin, Cotton Duck, For Wind Measuring Set; Assembly and Views 5-10-39 - Sections and Details 2 Provided by IHSNot for ResaleNo rep
7、roduction or networking permitted without license from IHS-,-,-MIL-T-43309C 3 777970b 0447492 7 m MIL-T-43309C LAWS AND REGULATIONS Department of the Army Field Manual FM 10-16 - General Repair for Tents, Canvas, and Webbing (Copies of specifications, standards, drawings and publications required by
8、 contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer , ) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, th
9、e issue in effect on date of invitation for bids or request for proposal shall apply: NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight Classification (Application for copies should be addressed to the American Trucking Associations, Inc., Traffic Department, 1616 P Stre
10、et, N.W., Washington, DC 20036.) UNIFORM CLASSIFICATION COMMITTEE, AGENT Uniform Freight Classification (Application for copies should be addressed to the Uniform Classification Commttee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Technical society and technical association specifica
11、tions and standardg are generally available for reference from libraries. tributed among technical groups and using Federal agencies.) They are also dis- 3, REQUIREMENTS 3.1 First article. when specified (see 6.2), the contractor shall furnish a sample for first article inspection and approval (see
12、4.3 and 6.4). 3.2 Materials and components (see 6.6) . 3.2.1 Cloth, duck, cotton. The cloth for the tarpaulin shall be No. 8 hard texture, conforming to type I of CCC-C-419. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-43309C 83 W 9999906
13、0447q93 9 MIL-T-43309C 3.2.1.1 Color and treatment. The cotton duck shall be olive drab shade No. 7 and conform to type I, class B of CCC-D-950. 3.2.2 Webbing, textile, cotton. The webbing for the web strap shall be olive drab shade No. 7 and conform to type IIb, class 4, 5/8-inch (16 rmn) width of
14、MIL-W-530. 3.2.3 Tape, textile, cotton. The binding tape shall be olive drab shade No. 7 and conform to type I, class 4, 3/4-inch (19 mm) width of MIL-T-43566. 3.2.4 Thread, polyester. The thread shall conform to type I, class 1, subclass B, shade S-1 (CA 66022) of V-T-285. The dyed thread shall sho
15、w fastness to weathering equal to or better than the standard shade sample (see 6.3). show good fastness to weathering. If no standard shade sample is available, the dyed thread shall Thread sizes shall be as follows: For all stitching, except stitching For stitching indicated by “Z“ on - Size ET fo
16、r needle, size F for s. Size FI? for needle and bobbin indicated by 2“ on drawings drawings looper 3.2.5 Cord, cotton. braided. The tie-down cord shall conform to type I, class 3, size No. 7 of T-0571. The color shall be olive drab shade No. 7 prior to mildew-resistant treatment and the shade impart
17、ed by the mildew- resistant treatment will be acceptable. 3.2.6 Leather; cattlehide. The leather for the cap and reinforcements shall conform to type II, class 1, style A, B or C, smooth finish, color natural (as produced by the tanning agents), 8 ounce of E-L-154. 3.2.7 Buckle, tongueless. The buck
18、le shall conform to type XII, class A of MIL-H-9890. 3.2.8 Clip, end, strap. The web strap end clip shall conform to type I, class 1 or 2, size 5/8-inch (16 mm) of MIL-C-496. 3.2.9 Gromet, metallic. The grommets shall conform to type III, class 3, size No. 3 of MIL-G-16491. 3.3 Construction. The con
19、struction of the tarpaulin shall conform to the drawings listed in section 2 and as specified herein. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-43307C 83 m 7777706 0447474 O m e 3.3.1 Stitches, seams, and stitchings. MIL-T-43309C 3.3.1.
20、1 Types of stitching. Stitching shall conform to FED-STD-751 as follows: For all stitching, except stitching - Type 301, 5 to 7 stitches per inch indicated by “Z“ on drawings For stitching indicated by “2“ on - Type 401, 5 to 7 stitches per inch - Chain portion of stitching shall (2 to 3 stitches/cm
21、) drawings (2 to 3 stitches/cm) not appear on outside of tarpaulin 3.3.1.2 Thread breaks, Thread breaks in stitching shall be overstitched not less than 1 inch (25 nun) at each break on type 301 stitching and not less than 1-1/2 inches (38 m) at each break on type 401 stitching. Thread breaks in typ
22、e 401 stitching may be overstitched with type 301 stitching. Thread breaks noted during inspection shall be repaired by overstitching the existing stitching for a distance of 1 inch (25 nun) on both sides of the break. ends of repair stitching are not required to be backstitched. The 3.3.1.3 Stitchi
23、ng ends, type 301. The ends of type 301 stitching shall be overstitched not less than 1 inch (25 mm) except where ends are turned under in a hem or held down by other stitching. automatically, stitch patterns such as box, box with cross-stitch, “W“ stitching or straight line tacking, 3 or more tying
24、, overlapping or backstitches shall be used to secure the ends of stitching. Where stitching is performed 3,3,1.4 Skipped stitches. Skipped stitches in type 401 stitching shall be overstitched not less than 1=1/2 inches (38 nnn) and not less than 1 inch (25 mm) where 3 or more consecutively skipped
25、stitches occur on type 301 stitching. stitching. Skipped stitches in 401 stitching may be overstitched with 301 * 3.3.1.5 Lubrication of thread. The addition of any lubricant to the polyester thread prior to or during the sewing operations is prohibited. * 3.3.1.6 Stitching margin. All stitching mar
26、gins shall be 1/8 i- 1/16 - inch (3 4- 2 mm). - * 3.3.2 Tie-down cord ends. The ends of the tie-down cords shall be machina- served in con ormance with ETIL-L-1709 . 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-43307C 3 777770b 0447475 2 M
27、IL-T-43309C 3.3.3 Setting of grommets. be smaller than the outside diameter of the grommet barrel so that the barrel mst be forced through the hole. without cutting the materials. Holes punched to receive the grommets shall The grommets shall be securely clinched 3.3.4 Setting sf end clips, The webb
28、ing shall be inserted the full depth of the clips. The clips shall be securely attached without cutting the webbing and the webbing shall be flat at the point of entrance. * 3.3.5 Wickine; of sewing thread (cup test) . There shall be no seepage of water through the tarpaulin stitching when tested as
29、 specified in 4.4.3.3. The cup test is intended to insure that nonwicking thread has been utilized and that no lubrication has been added to the thread during the sewing opera tion. * 3.3.6 Repairs. Repairs, whenever necessary, and when authorized by the contracting officer, shall be effected in acc
30、ordance with Department of the Army Field Manual 10-16 except that handsewn patches or cemented patches will not be acceptable. Repairs required as a result of failure of the cup test, and when authorized by the contracting officer, shall be performed by treating with a compound conforming to type I
31、, class 1 of TT-P-595 prior to retesting (see 6.5). * 3.4 YkFg. All markings and labels shall conform to DDD-L-20. The letters US 011 the tarpaulin shall conform to type IV, class 9 in the size characters and in the location shown on the drawing. be clearly legible after subjection to accelerated We
32、athering. Class 9 markings shall 9.4.1 Identification label. The identification marking shall conform to type III or IV, class 8 and shall be located as indicated on the drawing. * 3.5 Workmanship. Cloth components shall be clean and free of holes, cuts, tears or cloth defects such as multiple float
33、s, or broken or missing yarns. Webbing and tapes shall contain no frayed or scalloped edges and cord com- ponents shall be free of cuts or abrasions. Thread tension shall be maintained with seam properly sewed so that no runoffs, twists, pleats, or open seams shall result. Care shall be taken in sew
34、ing to see that no needle chews occur. thread ends shall be trimmed to 1/2 inch (13 um) or less. Metal components shall be free of burrs, sharp edges or corroded areas and shall not be broken or mal ormed . All 4. QUALITY ASSURANCE PROVISIONS * 4,l Responsibility for inspection. Unless otherwise spe
35、cified in the contract, the contractor is responsible for the performance of all inspec- tion requirements a8 specified herein. Except as otherwise specified in the 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-q3307C 3 9 77777Ob 0447q7b Y
36、MIL-T-43309C contract, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set: forth in the specification where
37、such inspections are deemed necessary to SSUK suppbias and sewices conform eo prescribed requirements. 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: 1. 2 . First article inspection (see 4.3) . Quality conformance inspection (see 4.4) . 4.3
38、First article inspection. When a first article is required, it shall be examined for the defects listed in tables I and II and tested as specified in 4.5. ments, or failure to conform to the test requirements, shall be cause for rejection of the first article. Any visual defect, any dimension not wi
39、thin the specified require- 4.4 Quality conformance inspection. Except as otherwise specified herein, sampling for inspection shall be made 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
40、all the requirements of referenced specifications, drawings and standards unless otherwise excluded, amended, modified or qualified in this specification or applicable purchase document . I * 4.4.2 In-process inspection. Inspection shall be made of the following I fabrication Processes to establish
41、conformance with soecified reauirements. a. There shall be no lubrication of polyester thread prior to or during the sewing operation for compliance with 3.3.1.5. b. Holes punched to receive grommets are in compliance with 3.3.3. Whenever nonconformance is noted, correction shall be made to the item
42、s affected and the process. 4.4.3 End item inspection. The lot shall consist of all completely fabricated tarpaulins offered for inspection at one time. shall be one completely fabricated tarpaulin. The sample unit Provided by IHSNot for ResaleNo reproduction or networking permitted without license
43、from IHS-,-,-MIL-T-43309C * 4.4.3.1 Visual examination. The tarpaulins shall be examined for defects in table I. The inspection level shall be II and the acceptable quality levels (AQLs) expressed in terms of defects per hundred units shall be 6.5 for major defects, 15.0 for major and minor A defect
44、s combined and 25.0 for major, minor A and B defects combined. TABLE I. Classification of defects for visual characteristics Classification Major Minor AB kamine Defect Cloth Cut, tear or hole: - greater than 1/8 inch (3 nun) in length or diameter - greater than 3/32 inch (2 uun) but not greater tha
45、n 1/8 inch (3 m) in length or diameter (2 mm) or less in length or diameter - broken or missing yarns, multiple floats clearly visible at normal inspection distance, approxi- mately 3 feet (1 m) - more than 5 holes 3/32 inch W? bng and tape Edge frayed or scalloped Tie-down cord Cut or abraded Free
46、end of cord not finished as specified Leather components Cut, tear or hole; brand, grub hole, open scratch, or deep wrinkle: - on reinforcements - on throat cap Hardware Broken Malformed : - fails to perform intended function - but will perform intended function Corroded area Burr or sharp edge whic
47、h may cause injury or damage to cloth 8 X X X X X X X X X Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-43309C TABLE I. Classification of defects for visual eharaeterfsties (contd) Classification Major Minor AB Examine Bef ect Grommets Improp
48、erly set; two or more teeth exposed Clinched loosely allowhg grommet to rotate in hole Clinched excessively tight, cutting fabric or insecurely clinched, i.e.s gromet or washer becorie disengaged X X X End clips Improperly clinched, Le., webbing not flat at point of entrance hto X Clip will not pass
49、 through opening in buckle Clinched excessively tight, cutting webbing or loosely clinched, Le., clip becomes disengaged from webbing I Seams and stitching Open seams on stitch type 301: X X - more than 1/4 inch (6 mm), but not - more than 1. inch (25 mm) more than 1 inch (25 m) Open seams on stitch type 401: - one row open for 1 inch (25 mm) - one row open for more than 1 inch - both rows open (not necessarily or
