1、MIL-C-3680C 30 June 1972 SUPERSEDING hlIL-C-3680B 27 June 1966 MILITARY SPEC IF ICATION CASES, FLAGS AND GUIDONS, COTTON DUCK This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope.- This specification covers cotton duck protective c
2、ases for flags and guidons used by the Department of Defense. 1.2 Classification.- The cases covered by this specification shall be of the following types as specified (see 6.2): Type I - Case, Flag, Cotton Duck, Individual, President Type II - Case, Flag, Cotton Duck, Individual and Organizational,
3、 Type III - Case, Flag, Cotton Duck, Individual or Organizational, Type IV - Case, Flag, Cotton Duck, Individual or Identification, Type V - Case, Flag, Cotton Duck, Guidon Type VI - Gase, Flag, Cotton Duck, U.S. Army Flag 4l-4 by 54“ 3 by 4 Automobile Flag 2. APPLICABLE DOCUMENTS 2.1 The following
4、documents of the issue in effect on the date- of invita- tion for bids or request for proposal form a part of this specification to the extent specified herein: SPECIFICATIONS FEDERAL C-F-206 - Felt, Sheet, Cloth, Felt, Wool, Pressed T-C-571 - Cord, Cotton, General and Special Purposes, V-T-285 - Th
5、read, Polyester Sash and Ventian Blind QQ-N-281 - Nickel-Copper-Alloy, Bars, Plate, Rod, Sheet, Strip, Wire, Forgings and Structual and Special Shaped Sections UU-P-268 - Paper, Kraft, Untreated, Wrapping CCC-C-419 - Cloth, Duck, Cotton, Unbleached, Plied-Yarns, Army and Numbered jFSC8345 / Licensed
6、 by Information Handling ServicesMIL-C-3bOC 83 799970b 0374373 4 = MIL-C-3680C CCC-D-950 - Dyeing and Aftertreating Processes for Cotton Cloth DDD-L-20 (General Use) PPP-B-601 - Box, Wood , Cleated-Plywood PPP-B-636 - Boxes, Fiberboard MIL-C-3133 - Cellular Elastromeric Materials, Fabricated MIL-T-4
7、3566 - Tape, Textile, Cotton, General Purposes, - Label, For Clothing, Equipage, and Tentage MILITARY Parts or in Colors STANDARDS FEDERAL Fed. Std. 191 - Textile; Test Methods Fed. Std. 751 - Stitches, Seams and Stitching MILITARY MIL-STD-105 - Sampling Procedures Inspection by Attr DRAWINGS THE IN
8、STITUTE OF HERALDRY 5-1-351 - Case, Flag, Cotton Duck 5-1-352 - Case, Cotton Duck, Pres and Automobile Flags and Tables for butes dents Colors (Copies of specifications , standards and drawings required by the contrac- tor in connection with a specific procurement function should be obtained from th
9、e procuring activity or as directed by the contracting officer,) (Miniature copies of drawings 5-1-351 and 5-1-352, identified as figures 1 and 2 are attached for information purposes only,) 3 , REQUIREMENTS 3.1 First article.- When specified (see 6.21, before production is commenced, a sample of th
10、e finished item shall be submitted or made avail- able to the contracting officer or his authorized representative for ex- amination and tests as specified in 4.2, sample authorizes the commencement of production but does not relieve the manufacturer of of this specification. manner and by the same
11、facilities to be used for the production item. The approval of the first article responsibility for compliance with all applicable provisions The first article shall be manufactured in the same 3.2 Materials.- Materials shall conform to the referenced specifica- tions and the requirements specified
12、herein. 3.2.1 Cloth. cotton duck.- The cotton duck, with the exception of the duck used in the fabrication of the reinforcement of the top section of the 2 Licensed by Information Handling ServiceshIIL-C-368oC case shall conform to type III of CCC-C-419 and shall weigh 8.25 ounces per square yard. T
13、he duck for the reinforcement in the top section of the case shall conform to type I, hard texture, No. 8 of CCC-C-419. 3.2.1.1 Color and treatment.- The color of the cotton duck shall be olive green 107 and shall match the standard shade sample (see 6.3). The duck shall be treated in accordance wit
14、h class B of CCC-D-950. Inhibitor (i 1 shall be used for the mildewresistant treatment. 3.2.2 Cotton tape.- The cotton tape for the case shall be 3/4 inch in width, match olive green 107 and shall conform to type I, class 4 of MIL-W- 43566. 3.2.3 Thread.- The thread for all stitching or bartacking s
15、hall con- form to type I or II, class 1, size F of V-T-285. 3.2.3.1 Color.- The thread shall be S-1 (Cable No. 66022) in color and shall show fastness to chlorine bleaching equal to or better than the standard sample (see 6.3). When no standard sample is available, the thread shall show good fastnes
16、s to chlorine bleaching. 3.2.4 Cotton rope.- The 3/16 inch diameter cotton rope shall conform to class 2 of T-C-571, except the permissible range of the copper content shall be 0.13 percent to 0.40 percent and the shade imparted by the treatment shall be acceptable. 3.2.5 Felt.- The felt used in the
17、 protective cover for the type I case shall conform to type I, classification No. 16R3X of C-F-206.and shall be 1/16 inch in nominal thickness. 3.2.6 Sponge rubber.- The sponge rubber used in the protective cover for the type I case shall conform to RS12A of MIL-C-3133. 3.2.7 Mone1.- The monel sheet
18、ing used for the protective cover of the type I case shall be .O131 inch nominal thickness and shall conform to class A of QQ-N-281. 3.3 Construction.- Cases shall be constructed in accordance with re- quirements of drawings 5-1-351 and 5-1-352, as applicable and the requirements specified herein. 3
19、.3.1 Stitching.- All stitching shall conform to stitch type 301 of Fed. Std. 751 with 6 to 8 stitches to the inch. Thread breaks shall be back- stitched not less than one inch at each break or end except where the ends are turned under in a hem or held down by other stitching. Thread tension 3 Licen
20、sed by Information Handling ServicesMIL-C-3680C shall be maintained so that there will be no loose stitching and that the lock will be embedded in the center of the material sewed. All thread ends shall be trimmed, 3,3,2 Protective covering of type I case.- The protective covering of the type I case
21、 shall conform to the details and dimensions of drawing 5-1-352, The felt innerlining which in turn shall be cemented to the monel case. The monel case shall then be cemented to the inside of the flag case in the location shown on the draw- ing, bonding of rubber to cloth and metal and of cloth to m
22、etal, shall be cemented to the rubber sponge which in turn Care should be taken to insure the adhesives used are designed for 3.4 Marking,- The identification markings shall conform to the require- ments for type IV, class 5 labels of DDD-L-20. In addition, the letters “U.S.“ .shall be applied in th
23、e size characters indicated on the drawing and shall con- form to the requirements for type IV, class 9 labels of DDD-L-20. shall be as specified for class 5 labels. Locations for all markings shall be as indicated on the drawings. Fastness 3,s Workmanship,- Cases shall be clean, well made and shall
24、 meet the acceptable quality levels established by this specification. 4, QUALITY ASSURANCE PROVISIONS 4,l Inspection responsibility.- Unless otherwise specified in the con- tract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. E
25、xcept as otherwise. speci fied in the contract or order, the supplier may use his own or any other facil- ities suitable for theperformance of the inspection requirements specified herein, unless disapproved by the Government. right to perform any of the inspections set forth in the specification wh
26、ere such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. The Government reserves the 4,2 First article inspection.- When a first article is required; ex- amination shall be made on a completely finished case for all provisions of this specificatio
27、n applicable to end item examination, 4.3 Inspection for acceptance,- Inspection f9r acceptance shall be in accordance with th6 provisions of MIL-STD-105, except where otherwise indicated. 4.3.1 Inspection of components.- The quality assurance provisions for component materials except as otherwise s
28、pecified in this specification shall be in accordance with the applicable specifications and standards referenced herein, When a conflict occurs between this specification and the referenced specification this specification shall govern. 4 Licensed by Information Handling ServicesMIL-C-3680C 4.3.2 I
29、n-process inspection.- Inspection shall be made at any point or during any phase of the manufacturing process to determine whether operations or assemblies are carried out as specified. The Government reserves the right to exclude from consideration for acceptance any material or service Por which i
30、n-process inspection has indicated nonconformance, 4.3.2.1 Intermediate inspection of protective coveri=Lq-.- Inspoction of the assembled protective covering, type I case, shall. be perfmifieti prior to attaching this component to the body of the case. Defects found in this examination shall be clas
31、sified as follows: The sample unit shall be one metal . case with the felt innerlining and the sponge ribber lining completely assembled and cemented. per hundred units. The inspection level shall be I and the AQL shall be 4.0 defects EXAMINE DEFECT Case Any noticeable defect on the surface of the c
32、ase affecting servi ceabi 1 i ty . Felt, sponge and metal protective cover not assembled as specified . Edges of felt interlining not shaped as specified. Any part of assembly not securely cemented, i.e., any area of delamination in bonding between rubber and felt or rubber and metal. Dimension of c
33、over more or less than 1/16 inch from specified dimensions. Exposed edges of felt arid sponge uneven with the edge of the metal case opening by more than 1/16 inch. 4.3.3 Inspection of end item.- 4.3.3.1 Visual examination of cases.- Defects found during examination shall be classified in accordance
34、 with 4.3.3.1.1 and 4.3.3.1.2. The lots shall be inspected in accordance with 4.3.3.1.3. examinations shall be one completely fabricated case. The unit of product for these 4.3.3.1.1 Examination for visual characteristics.- 5 Licensed by Information Handling ServicesMIL-C-3680C Exami ne Defects cabr
35、ics Holes, cuts or tears.s Fabric defects: -seriously affecting serviceability or appearanceeeeoo.e -affecting serviceability or appearance, but not seriously,. More than 1/4 inch, but less than 1/2 inch Seams and Stitching: Open seam More than 1/2 inch NOTE: A seam shall be classified as open when
36、one or more stitches joining a seam are broken or when two or more consecutive skipped stitches or run- offs occur. On double-stitched seams, a seam shall be considered open when either one or both sides of a seam are open. Raw edges (except on -3/4 inch or more, but not more than 3 inside of case)
37、inches. -3 inches Raw edges not securely caught in stitching When securely caught in stitching: NOTE: shall be classified as open seams, Run-off s (See open seams) Seam and stitch Wrong seam or stitch type. types ititch tension Loose, resulting in a loose seam., Loose, resulting in a loosely exposed
38、 top or bobbin thread; tight, resulting in excessive puckering of fabric on seams. jtitches per One or two stitches less than minimum inch specified Three or more stitches less than minimum specified. . I One or more stitches in excess of maximum specified , NOTE: Variation in the number of stitches
39、 caused by the operators speeding up the machine and pull- ing the fabric in order to sew over heavy seams, heavy places or in turning corners shall be classi- fied as follows: (a) Within the major defect classification - minor defect. Class Ma i or X X - - X - X X X - - X - icat ion Minor “ X X - X
40、 - 6 Licensed by Information Handling ServicesMIL-C-3680C Examine Defects no defect. (b) Within the minor defect classification - St itching margins titching gage titching ends h read breaks omponents and assembly arking leanness On margins required to finish 1/8 inch or more, under or over specifie
41、d width by more than 1/16 inch; on margins required to finish 1/16 inch, less than specified width Under or over specified width by more than Not backstitched., Backstitched less than one inch. Any required detail of construction, any component or part of case omitted (un- les s ot hemi se cl as si
42、f i ed herein ). . 1/16 inch Needle chew which may develop into holes. Seams badly puckered or excessively pleat- ed: Oiie or more required rows of stitching omitted except on boxstitching at corner of opening. -one row of stitc-hing omitted -two or more rows of stitching omitted . -length of boxsti
43、tching less than spec- ified by more than 1/8 inch . Omitted, illegible, incorrect or misplaced Grease or oil stains clearly noticeable; thread ends not trimmed throughout. Boxs t i t c hing iiicomp 1 et e : etails of construction: Botton section, all types: Hem Formed on outside of case. Hems requi
44、red to finish one inch, less thE specified width by more than 1/8 inch; hems required to finish 1-1/2 inches, le5 than specified widty by more than 1/4 in( All types Cuts or abrasions, S2liced . Cut length less than specified by more th: 3/4 inch. Not caught in base of trangle stitching, Free ends o
45、f cord uneven in length by mor( than one inch., Free ends of cord not knotted . Cord : cation Minor X X - X - - x - X - X X X X X - X X X X X 7 Licensed by Information Handling ServicesMIL-C-368OC Classi Examine Defects Mai or Dpening at end rie tapes (type Not firmly and tightly woven; edges frayed
46、 Under or over specified length by 1/2 inch of closing seam, all types I only) or scalloped,. x or more (from end of bottom opening) - Folded portion of tapes not inserted or not caught in closing seam - - Free ends of tape unfinished . Finished length of tapes less than 15 inch- Set beyond location
47、 indicated on drawing eS,.*.*.w.e*.e - - by more than 1/4 inch., . Pocket (type I Omitted,.bb. X only) Stitching forming pocket out of alignment with inner row of stitching on seam clos- ing top section by 1/8 inch or more; not parallel with closing body seam by 1/8 - . inch or more,. Top section: T
48、ypes II, III, Set to body with pointed end offcnXrd3na V and VI by 1/4 inch or more.,. w. NOTE: -This examinaEn shall be made by folding body and top section in half. Types I and All types Radius of rounded end irregular or not Length of top section less than specified by more than 1/4 inch from edg
49、e of seam Not securely cemented to duck (inner plies Any part of opening obstructed, failing to NOTE: This examination shall be performed with the case turned inside out. IV uniform at both sides, - joining top to body to peak of section, - Protect ive I only) covering (type of top section on both surfaces) . X serve intended purpose.,.*. X i ca t i on Minor X - X X X X - X X X X - I 4.3.3.1.2 Defects in dimensions.- Any dimensions that is not within the 4.3.3.1,3 Inspection levels and acceptable quality levels (AQLs1.- ,The specified tolerance shall be cl
