1、MIL-H-4442A 4 9979906 050090 O MIL-H-4442 8A 18 December 1991 SUPERSEDING MIL-H-44428(GL) 7 August 1991 MILITARY SPECIFICATION HOOD, GAS MASK, SPECIAL PURPOSE, ToXIC0TXx;ICAL AGENIIS PROI“IVE, M3 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1.
2、SCOPE 1.1 Scope. This specification covers one type and size of special purpose hood to provide military personnel protection against toxicological agents. The hood is to be used over a gas msk and with the Coverall, Toxicological Agents Protective, M3. This is a special purpose Life Support Clothin
3、g and Equipnt (LSC distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SPECIFICATIONS FEDERAL A-A-5 O O 8 3 V-T-285 DDD-L-20 PPP-B-636 PPP-c-1797 PPP-T-45 MILITARY MIL-B-371 MIL-B-543 MIL-F- 10884 MIL-C-12189 MIL-L-35078 MIL-T-
4、4 35 6 6 STANDARDS FEDERAL FED-STD- 19 1 FED-STD-75 1 MILITARY MIL-STD-105 MIL-SID-129 MIL-STD-147 MIL-STD-731 - Bag, Plastic, Folded Garment - Thread, Polyester - Label: For Clothing, Equipage and Tentage (General Use) - Boxes, Shipping, Fiberboard - Cushioning Material, Resilient, Low Density - Ta
5、pe, Gumned, Paper, Reinforced and Plain, for Unicellular, Polypropylene Foam Sealing and Securing MIL-H-44428A 84 9999906 0500893 2 MIL-H-44428A - Braid, Textile, Tubular - Buckles, Tongueless and Web Strap - Fasteners, Snap - Cloth, Coated: Butyl Coated, Toxicological Agents Protective - Loads, Uni
6、t: Preparation of Semiperishable Subsistence Items; Clothing, Personal Equipment and Equipage, General Specification For or in Colors - Tape, Textile, Cotton, General -se, Natural - Textile Test Methods - Stitches, Seams, and Stitching . - Sampling Procedures and Tables for Inspection - Marking for
7、Shipment and Storage - Palletized Unit Loads - Quality of Wood Members for Containers and Pallets by Attributes (Unless otherwise indicated, copies of federal and military specifications, standards and handbmks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Ave
8、nue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government documents, drawinqs, and publications. The follawing other Govenunent documents, drawings, and publications fonn a part of this documnt to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation
9、. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-44428A 84 9999906 0500892 4 MIL-H-44428A DRAWINGS U.S. ARMY NATICK RE“, DEWEIQPME“, AND ENGINEERING 2-6-103 - Cord Lock, Acetal Body and Nylon Wheel 2-6-104 - Cord Lock, Single Cord (Copies of
10、 drawings are available from the U.S. Army Natick Research, Developnt, and Engineering Center, Ai“: 01760-5017.) S“C-X, Natick, MA 2.2 Non-Government publicatims. The following dmuments form a part of this d0C;ument to the extent specified herein. the issues of the doczunents which are DOD adopted a
11、re those listed in the issue of the DODISS cited in the solicitation. the issues of documents not listed in the DODISS are the issues of the doczunents cited in the solicitation (see 6.2). Unless otherwise specified, Unless otherwise specified, AMERICAN SOCIETY FOR TESTING AND MATERIU (ASaM) D 3951
12、- Standard Practice for Comercial Packaging (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.) (Non-Government standards and other publications are normally available from the organizations that prepare or wh
13、ich distribute the documents. documents also may be available in or through libraries or other informa- tional services.) These 2.3 Order of precedence. In the event of a conflict between the text of Nothing in this document, however, supersedes applicable this d0C;ument and the references cited her
14、ein, the text of this dociament takes precedence. laws and regulations unless a specific exemption has been obtained. 3. 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.3) in accordance with 4.3. Samples, when furnished, are solely for guid
15、ance and information to the contractor (see 6.4). may appear in the sample, in which case this specification shall govern. 3.2 Guide sainples. Variations from this specification 3.3 Materials. It is encouraged that recycled material be used when practical as long as it meets the requirements of this
16、 specification. 3.3.1 Coated cloth. The coated cloth shall be butyl coated nylon cloth conforming to MIL-C-12189. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-4442A 84 9999906 0500893 b MIL-H-44428A 3.3.2 Bias bindinq. The bias binding for
17、 the snout rings shall be 3/4 to 1-1/8 inch wide and cut from the coated fabric specified in 3.3.1, 3.3.3 Strappinq. -0 inch wide and shall be made from the coated fabric specified in 3.3.1, straight or bias cut. The strapping used to seal the seams shall be 3/4 + 1/8, 3.3.4 Cement. The cement used
18、to adhere the strapping to the seams shall be clear and of the self-curing neoprene or butyl base type. when applied and tested as specified in 4.4.1, shall not crack or flake when subjected to the cold crack test, and the hydrostatic resistance of the cement coated cloth shall be not less than 90 p
19、ercent of the actual hydrostatic value of the butyl coated cloth prior to cementing. The cement, 3.3.5 Thread, polyester. The thread for all stitching shall conform to type I, class 1, sub-class A of V-T-285. table I. The size shall be as specified in The thread shall be dyed Olive Drab S-1, C.A. 66
20、022. 3.3.6 Tape, cotton. The cotton tape shall conform to type I, class la, 1/2 inch wide of MIL-T-43566, except the tape shall be dyed Olive Drab 7. 3.3.7 Braid. All braid shall be texturized polyester conforming to class 2 of ML-B-371 and shall be dyed Olive Drab 7. specified belm. The type shall
21、be as I 3.3.7.1 Braid for neck drawcord. The braid for the neck drawcord shall be type II. inch to prevent raveling. The ends of the braid shall be resin dipped or tipped 3/4 _+ 1/8 3.3.7.2 Braid for eye holes and snout drawcords. The braid for the eye holes and snout drawcords shall be type VII. st
22、itched (see table I, operation 3c) or resin dipped or tipped 3/4 _+ 1/8 inch to prevent raveling. The ends of the braid shall be 3.3.8 Buckle. The buckle shall be tongueless, one-bar, 5/8 inch, conforming to type I, style 2, class 1, construction B of MIL-B-543 or as an alternate shall be tongueless
23、, two-bar, 5/8 inch conforming to type II, style 3, class 1 of MIL-B-543. 3.3.9 Snap fasteners. finish 2 of MIL-F-10884. shall be selected by the contractor and shall be of sufficient length to provide a firm clinch. The snap fasteners shall conform to style 2A, The size of the button and the eyelet
24、 cmpnents 3.3.10 Cord lock. The cord lock for the neck drawcord shall conform to Drawing 2-6-104 or as an alternate shall conform to Drawing 2-6-103. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-lb I I I I I l l I O I MIL-H-44428A 84 9997906 050
25、0874 8 m MIL-H-4 4 4 28A 3.3.11 Identification label. Each hood shall have an identification label confonning to type IV or VI, class 1 of DDD-L-20 with the follawing exceptions: Type IV label (stamped) (a) (b) A vinyl base black indelible ink shall be used. Utters shall be sans-serif, extra bold, m
26、onotone style, 14 points (caps only). Type VI label (cloth) (a) (b) (c) (d) The label shall be printed prior to impregnation or coating. Only chlorine bearing vinyl resin composition shall be used for The label shall measure 2-3/4 by 1-1/2 inches minimum and the All colorfastness and writing tests a
27、re not applicable. impregnation or coating. legend shall be printed parallel to the small dimension. 3.4 Desiqn. 3.5 Fiqures. Figures 1 and 2 are furnished for information only. If there are any inconsistences between the written document and the figures, the written document shall control. The desi
28、gn of the hood shall be as shown in figure 1. 3.6 Patterns. Standard patterns, which provide a seam allowance of 3/8 inch for all lapped seams unless otherwise specified in table I, will be furnished by the Government. any manner and are to be used only as a guide for cutting the contractors working
29、 patterns which shall be identical to the standard patterns. The standard patterns shall not be altered in 3.6.1 List of pattern part s. The coniponent parts for the hood shall be cut from the material specified in a manner to ensure that the heavy side of the coated mterial faces outside when hood
30、is assembled and in the quantity indicated below: Material Item Nmenc lature cut part S Cloth, coated, butyl coated, 1 Snout rings 2 toxicological agents protective 2 FKOnt neck 1 3 Back neck 1 4 Front, left and right 2 5 Back, left and right 2 6 Snouts 2 3.7 Construction. The construction shall con
31、fonn to the requirements specified in table I and herein. heavily coated side of the cloth and strapping facing to the outside. The hood shall be assembled with the 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-4442A 4 D 7777706 050075 T MI
32、L-H-44428A 3.7.1 Stitches, seams, and stitchinq. All stitches, seams, and stitching shall conform to FED-STD-751. The typ. of seam, stitching and stitches per inch shall be as specified in table I. Seam allowances shall be maintained with seams sewn so that no raw edges, run-Offs, twists, pleats, pu
33、ckers, or open seams occur. 3.7.1.1 Type 301 stitchinq. Unless otherwise specified, ends of all 301 stitching, except when caught in other seams or stitching, shall be backstitched or overstitched 3/8 inch minimum. Thread tension shall be maintained so that there will be no loose stitching resulting
34、 in loose bbbin or top thread, or excessively tight stitching resulting in puckering of the materials sewn. The lock shall be embedded in the materials sewn. 3.7.1.1.1 Repairs of type 301 stitchinq. Repairs of type 301 stitching shall be as follows: a. When thread breaks or bobbin run-outs occur dur
35、ing sewing, the stitching shall be repaired by restarting the stitching a minimum of 3/8 inch back of the end of the stitching. I/ b. Thread breaks or two or mre consecutive runoff or skipped stitches noted during inspection of the item (in-process or end item) shall be repaired by overstitching. Th
36、e stitching shall start a minimum of 3/8 inch back of the defective area, continue over the defective area and continue a minimum of 3/8 inch beyond the defective area onto the existing stitching. Loose or excessively tight stitching shall be repaired by removing the defective stitching, without dam
37、aging the materials, and restitching in the required mer. A/ - i/ When making the above repairs the ends of the stitching are not required to be backstitched. 3.7.1.2 Use of automated aware1 auipment. Automated apparel equipnt may be used to perform any of the operations specified in table I, provid
38、ing that the seam and stitch type are as specified and the finished component conformns to the required configuration. pattern is forwarded, the component shall conform to that pattern. mre than 1/4 inch. When a governmnt furnished shaper 3.7.1.3 Thread ends. All thread ends shall be trimned to a le
39、ngth of not 3.7.1.4 E3artackinq. Bartacking shall be 1/2 f 1/16 inch in length and 1/8 - + 1/32 inch in width and shall contain 14 to 18 stitches, unless otherwise specified. Bartacking shall be free from thread breaks and loose or tight stitching. 3.7.2 APP lication of seam strappinq. 6 Provided by
40、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-44428A 84 9999906 0500896 I MIL-H-44428A 3.7.2.1 Preparation of seam area for strapping. Before applying the cement; the seam, the area along the seam where the strapping makes contact, and the surface of th
41、e strapping to be adhered, shall be thoroughly cleaned with a suitable cleaning agent which does not degrade the butyl coating. 3.7.2.2 Strappinq of seams. The seams, where required, shall be strapped on both the inside and the outside using the cement specified in 3.3.4. individual seam shall be st
42、rapped with a continuous length of strapping with the strapping centered on the seam. Where ends of strapping meet, a 1 _+ 1/4 inch overlap shall be made. overlapped. position, the cement line shall not extend mre than 3/4 inch on either side of the strapping. Each Whenever strappings intersect, the
43、y shall be When the strapping is centered over the seam and pressed into 3.7.3 Settinq of snap fasteners. A hole shall be prepunched to receive the button and eyelet components of the snap fasteners. The hole shall be smaller than the outside diameter of the button and eyelet barrels so that the bar
44、rel must be forced through the hole. the setting operation with the button or eyelet barrel. The fasteners shall be securely clinched without cutting the adjacent materials and no mre than two splits shall occur in the button or eyelet barrel. The hole shall not be punched in 3.8 Manufacturinq opera
45、tions requirements. The hood shall be made in The contractor is not accordance with all operations listed in table I. required to follow the exact sequence of operations. I. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-4442A 4 9999906 0500
46、897 3 MIL-H-44428A 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a % O u W H ! MIL-H-4442A 4 9999906 050089 5 MIL-H-44428A F4 w m w - k 3 9 8 rl a . Co wl 2 8 (Y Ei O QI 14 I I I I 2 I Provided by IHSNot for ResaleNo reproduction or networking pe
47、rmitted without license from IHS-,-,-i E! E MIL-H-44428A 84 9999906 0500904 7 MIL-H-4 442 8A i w El O rl I a3 k plx ?i e 4 I E 15 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-44428A 84 m 9999906 0500905 9 m MIL-H-44428A W O ri I 03 Fi ui v)
48、b Fi O M I Li! . 3 M 4 rl cv rl 4 P. 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-4442A 4 m 9999906 8500906 O m MIL-H-44428A w W Fi O rn d. 4 I) - rl 5 u) Fi VI Fi 17 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
49、thout license from IHS-,-,-MIL-H-4442A 4 9999906 0500707 2 MIL-H-44428A 3.9 Performance. 3.9.1 Strappinq adhesion. After application of the strapping as specified in 3.5.2, the strapping adhesion shall meet the requirerents of table II when tested as specified in 4.4.1 and 4.4.4, as applicable. TABLE II. Strappinq adhes
