1、MIL-H-33bqD 84 7779706 0373663 T M (- MIL-H-336bD 13 December 1978 SUPERSEDING MIL-H-3364C 31 December 1970 MILITARY SPECIFICATION HELMET, SUN This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. 1.2 Classification. This specificati
2、on covers the requirements for a sun helmet. The sun helmet shall be of one type and of the following colors, as specified (see 6.2). 1.2.1 Colors. Bleached white Khaki No. 1 Olive Green 107 2. APPLICABLE DOCUMENTS * 2.1 Issues of documents, The following documents of the issue in effect on date of
3、invitation for bids or request for proposal, form a part of this specification 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: Natick, MA 01760 by using the self
4、-addressed Standardization Docu- ment Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. US Army Natick Research and Development Conmiand, FSC 8415 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-3364D 4 777
5、7906 0373664 I MIL-H-3364D SPECIFICATIONS FEDERAL V-T-2 85 IT-E-489 TT-1-5 42 W-P-268 w-P-553 CCC-C-426 CCC-C-446 PPP-F-320 PPP-T-45 MILITARY MIL-C-342 MIL-F-495 MIL-B-17757 MIL-C-43892 STANDARDS FEDERAL FED-STD-191 MILITARY MIL-STD-105 MIL-STD-129 MIL-STD-147 Thread, Polyester. Enamel, Alkyd, Gloss
6、 (For Exterior and Interior Ink, Marking, Laundry, Black. Paper, Kraft, Wrapping. Paper, Wrapping, Tissue. Cloth, Drill, Cotton. Cloth, Muslin, Cotton. Fiberboard, Corrugated and Solid, Sheet Stock Tape, Gummed, Paper Reinforced and Plain, For Surfaces). (Container Grade) and Cut Shapes. Sealing and
7、 Securing. Cloth, Wind Resistant, Poplin, Cotton. Finish, Chemical, Black, For Copper Alloys. Boxes, Shipping, Fiberboard (Modular Sizes). Cloth, Twill: Cotton and Nylon. Textile Test Methods. Sampling Procedures and Tables for Inspection by Marking For Shipment and Storage. Palletized Unit Loads 40
8、“ X 48“ Pallets. Attributes. (Copies of specifications, standards, drawings and publications required by 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
9、documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply: 2 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-
10、33bLID BLJ m 7777906 0373665 3 m MIL-H-3364D NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight Classification DC 20036.) (Application for copies should be addressed to the American Trucking Associations, Inc., Traffic Department, 1616 P Street, N.W., Washington, UNIFORM
11、CLASSIFICATION COMMITTEE, AGENT Uniform Freight Classification (Applicatlm for copies should be addressed to the Uniform Classification Canmiittee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) 3. REQUIREMENTS 3.1 Guide sample. Samples of the end item, when furnished, are solely for guid
12、ance and information to the contractor. may appear in the sample, in which case this specification shall govern (see 6.4). Variations from this specification * 3.2 First article. When specified (see 6.21, the contractor shall furnish a sample for first article inspection and approval (see 4.3 and 6.
13、3). 3.3 Materials (see 6.6.) and components. 3.3.1 Impregnated fiber shell. The molded fiber shell shall consist basically of sulphate pulp, combined with other fibers for suitable strength and impregnated with varnish and water-repellent materials. The molded fiber shell shall contain sufficient im
14、pregnating materials to meet the requirements specified in 3.6. be uniform in thickness and free from separations and objectionable odors. resistant cloth for the helmet shell outer cover shall conform to class B of MIL-C-342. olive green 107 as applicable. conforming to MIL-C-43892 may beused as a
15、substitute. The molded impregnated fiber shell shall * 3.3.2 Cloth, wind resistant, poplin, cotton. The cotton poplin wind- The colors shall be bleached white, khaki shade No. 1, or As an option, cotton and nylon twill cloth * 3.3.3 Cloth, muslin, cotton. The cotton muslin cloth for the helmet shell
16、 inner cover shall conform to type III, class 3 of CCC-C-446, except that the cloth shall be water-repellent treated so that the finished helmet meets the water resistance requirement specified in 3.6.3. the cloth shall be natural. The color of 3 f ! Provided by IHSNot for ResaleNo reproduction or n
17、etworking permitted without license from IHS-,-,-MIL-H-33bYD 84 m 0b 0373666 5 m - MIL-?I-3 364D 3.3.4 Webbing. The webbing shall be made of combed two-ply cotton yarns and shall conform to the requirements in table I when tested as specified in 4.4.1. The webbing shall be plain weave face and back
18、and the filling shall weave continuously one face pick and one back pick. begin on one selvage with seven warp threads (four face and three back) followed by one warp binder thread. ing together the face and back. and two back) between the binders. opposite selvage, the webbing shall end with six th
19、reads (three face and three back warp threads). The weave shall Binder threads shall weave plain, bind- There shall be four warp threads (two face Following the eighth binder, on the TABLE I. Physical requirements for webbing Width Weight Thickness Total warp threads Face and back warp threads Binde
20、r warp threads Filling threads Breaking strength (full width) 7/16 2 1/32 inch (11 + 1 mm) 0.20 to 0.25 ounces pr linear yard 0.055 inch (1.40 mu) maximum 49 mnimum 41 minimum 8 minimum 55 per inch (22 per un) maximum 90 pounds (400 N) minimum (6.2 to 7.8 g/m) 3.3.4.1 Color. The color of the webbing
21、 shall match the outer covering (cloth, cotton, uniform twill) of the helmet and shall show good fastness to weather, perspiration, and laundering when tested as specified in 4.4.1, Colorfastness requirements for bleached white webbing are not applicable. 3.3.5 Cloth, coated, pyroxylin (for sweatban
22、d). The base cloth shall be a cotton sateen with a minimum thread count of 96 ends and 60 picks per inch (38 ends and 24 picks per un). sufficient pyroxylin so that the coated fabric weight is not less than 17.5 ounces per square yard (593 g/m2). 231 and the coating shall have a box calf grain finis
23、h (see 6.4). The cloth shall be coated on one side only with The color of the coated cloth shall be brown 3.3.6 Cloth, drill, cotton (for sweatband). The cloth shall conform to type III, class 1 of CCC-C-426. 3.3.7 Braid (for sweatband). The braid shall be made from mercerized cotton yarn and shall
24、be either flat or circular. greater than 3/32 inch (2 mn) in diameter and flat braid shall be not greater than 1/8 inch (3 um) in width. The braid shall have a breaking strength of not less than 40 pounds (178 N). Circular braid shall be not 4 ._ . . . ._ . . Provided by IHSNot for ResaleNo reproduc
25、tion or networking permitted without license from IHS-,-,-MIL-H-3364D 3.3.7.1 Color. The braid shall be vat dyed a brown shade to approximate the color of the pyroxylin-coated cotton fabric specified in 3.3.5. The braid shall show good fastness to perspiration and crocking when tested as specified i
26、n 4.4.1. 3.3.7.2 Braid tips. The tips shall be made of fiber, slow-burning plastic, or nonferrous metal and shall measure 1/2 + 1/16 inch (13 5 2 mm) in length. A tip shall be firmly attached to each end-of the braid. 3.3.8 Adhesive. The adhesive or adhesives used in the manufacture of Evidence of w
27、ater resistance shall the helmet shall be water resistant. be determined by conformance to wet strength requirements specified in 3.6.2. 3.3.9 Hardware. All hardware shall be fabricated from good commercial grade brass sheet and shall conform to the dimensions specified in figures 1, 2, and 3 as app
28、licable. items : The hardware shall consist of the following Sweatband attachment brackets Hooks Slide buckle Washers Eyelets - 3.3.9.1 Color and finish. All hardware components shall have a black chemical finish conforming to MIL-F-495. the eyelets shall be protected with a lacquer finish. chemical
29、 finish specified in 3.3.9.1, they shall be given an enamel finish conforming to class B of m-E-489. the shade of the outer material of the sun helmet. All hardware components excluding 3.3.9.2 Color of eyelets. After the eyelets have been given the black The color of enamel shall approximate 3.3.10
30、 The ink used to mark the inside crown of the sun helmet shall conform to ni-1-542. * 3.3.11 Thread polyester. The thread for bartacking the looped ends of the chin strap shall be thread, polyester, type I or II, class 1, sub-class A, size B, conforming to V-T-285. 3.3.11.1 Color and colorfastness.
31、The color of the thread shall be the same as the webbing and shall show good fastness to weather, perspiration, and laundering. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-3364D 3.4 Design. The design of the sun helmet. shall be in accord
32、ance with figure 1. 3.5 Construction of helmet. * 3.5.1 Shell. The shell shall be produced by molding the impregnated fiber specified in 3.3.1 to the shape, size, and design shown on figure 1. The shell shall be covered on the outside with the cotton poplin specified in 3.3.2 and on the inside with
33、the cotton muslin specified in 3.3.3. The outer and inner covering shall be seamless and shall be cemented to the shell with the adhesive specified in 3.3.8. shall be turned under the rolled edge brim and cemented to the pressed fiber shell so that no raw edges are exposed as shown on figure 1. The
34、outer and inner covering 3.5.2 Brackets. Two attachment brackets for the sweatband shall be secured to the inside of the helmet, at the base of the crown, midway be- tween the front and back, on each side as shown on figure l. Each bracket shall be attached with two eyelets which shall be securely c
35、linched on the inner side as shown on figure 2. 3.5.3 Eyelets for ventilation. Nine eyelets (in addition to those utilized for securing the brackets) shall be located on the helmet as shown on figure 1. The eyelets shall be securely clinched on the inner side of the helmet. 3.5.4 Sweatband. The swea
36、tband shall be constructed from the fabrics specified in 3.3.5 and 3.3.6, the adhesive specified in 3.3.8, and the eyelets specified in 3.3.9 in the following manner: (a) A 2-1/2 + 1/16 inch (64 2 um) wide strip of the pyroxylin coated fabric -hall be folded over a 15/16 inch (24 mm) minimum width s
37、trip of cotton drill to meet at the center on the underside and folds of the underside and the folds of the band shall be thoroughly and evenly cemented. (b) Four eyelets shall be placed at each end of the sweatband (for lacing adjustment) as shown on figure 1. (c) Four eyelets equipped with washers
38、 (for attachment of the sweatband bracket) shall be located along the upper edge of the sweatband and shall be clinched on the underside of the sweatband. One eyelet shall be located 2-1/2 + 1/8 inches (64 + 3 nun) from each end of the sweatband and the remaining two eyelets shall be equally spaced
39、between them, (d) The sweatband shall finish i-il8 + 1/16 inches (29 - + 2 mm) wide and 21-3/4 5 1/4 inches (552 5 6-m) long. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-II-3364D (e) The braid specified in 3.3.7 of sufficient length, shall
40、be laced in the adjustment eyelets. * 3.5.5 Chin strap. The chin strap shall be made of the 7/16 inch (11 mm) webbing specified in 3.3.4 with a slide buckle (for length adjustment) and a metal hook at each end as shown on figure 3. * 3.5.5.1 Chin strap (alternate construction). The chin strap shall
41、be made of 7/16 inch (11 mn) webbing specified in 3.3.4 with a slide buckle (for length adjustment) and a meEal-loop at each end as shown on figure 3. When the alternate construction is used each bracket shall be equipped with an attaching hook of the dimensions shown on figure 3. * 3.5.5.2 Bartacks
42、. Bartacks shall be 5/16 to 3/8 inch (8 to 10 mu) in length, 1/8mhch (3 -i- 1 mn) in width and shall have 28 stitches per bartack. The bartacks shall have no thread breaks or loose stitching. * 3.5.6 Marking. The following information shall be stamped in black characters at the inside back of the cr
43、own: Item description Contract number Stock number Contractors name The marking shall be in characters not less than 8 point (approximately 3/32 inch (2 nmi) in height with the ink specified in 3.3.10. shall be clearly legible and shall not show smearing, bleeding or off- setting. The marking 3.6 Pe
44、rformance requirements. * 3.6.1 Sweatband. The sweatband assembly shall not deteriorate or become stiff when tested as specified in 4.4.6. 3.6.2 Dry and wet strength of helmet. The finished sun helmet shall not delaminate or become distorted when subjected to the wet and dry strength tests specified
45、 in 4.4.6. 3.6.3 Water resistance of helmet. The sun helmet, less sweatband and chin strap, shall show an increase in weight of not more than 30 percent of the dry, sun helmet weight when tested as specified in 4.4.6. In addition, there shall be no evidence of any separation of either lining or oute
46、r covering from the body of the sun helmet. The rolled edge may unroll slightly, but 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-3364D 84 W 7799406 O373670 7 W - i MIL-H-3364D the unrolling shall not be apparent on the outside of the helm
47、et, and the opening between rolled edge and brim shall not exceed 3/16 inch (5 mm) after testing . 3.6.4 Heat resistance of helmet. The finished sun helmet shall not become distorted when subjected to the heat resistance test specified in 4.4.6. 3.7 Weight. The complete sun helmet, including compone
48、nt parts, shall weight not more than 9.5 ounces (269 g). * 3.8 Repairs. Except as.otherwise specified herein, repairs are not allowed to be made to the sun helmet. * 3.9 Replacement of defective components. During the spreading, cutting and manufacturing process, components having material defects o
49、r damages that are classified as defects in 4.4.3 shall be removed from production and replaced with non-defective and properly matched components. 3.10 Workmanship. The finished sun helmet shall conform to the quality of product established by this specification and.the occurrence of defects shall not exceed the applicable acceptable quality level. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Un
