1、MIL-S-21894F 1 September 1982 SUPERSEDING 11 January 1977 MIL-S -2 18 943 Beneficial cornments._(recommendations, additions, deletions) and any pertinent data which may be of us-ln improving this document should be addressed to: Officer in Charge, Navy Clothing and =Textile Research Facility, 21 Str
2、athmore Road, Natick, MA 01760 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. MILITARY SPECIFICATION # SHOES, SAFETY (CHUKKA) This specification is approved for use by all Departments and Agencies of the De
3、partment of Defense. 1. SCOPE 1.1 Scope This specification covers the requirements for materials and manufacture of a work style shoe having water-resistant leather uppers, steel toes, and oil and jet fuel resistant soles and heels. 1.2 Classification The shoes shall be of one type in the following
4、whole, and half sizes, and widths as specified (see- 6.2) : Sizes 5 through 15 4 through 15 4 through 15 4 through 15 4 through 15 Widths XN - Extra Narrow N - Narrow R - Regular W - Wide XW - Extra Wide 2. APPLICABLE DOCUMENTS 2.1 Government documents 2.1.1 Specificatiohs and standards Unless other
5、wise specified, the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. THIS DOCUMENT CONTAINS % - PAGES. -
6、 G Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- NIL-S-21874F 84 7999906 0383239 3 I MIL-S-21894F SPECIFICATIONS FEDERAL C-F-2 O 6 V-L-61 V-T-285 V-T-295 KK- I- 5 7 O TT-S-7 3 5 DDD-T-8 6 PPP-B-63 6 MIL I TARY MIL-S-4383 MIL- C-139 24 MIL-C-41814
7、MIL-C-43956 MIL-L-43585 MIL-S-22777 MIL-L-10867 STANDARDS FEDERAL FED-STD-151 FED-STD-191 FED-STD-311 FED- STD- 601. FED-STD-751 MIL I TARY MIL-STD-105 MIL-STD-129 - Felt, Sheet: Cloth, Felt, Wool, Pressed - Laces, Nylon - Thread, Polyester - Thread, Nylon - Insole, Footwear, Leather, Cattlehide - S
8、tandard Test Fluids Hydrocarbon - Tape, Textile, Cotton, General Purpose (Unbleached, - Boxes, Shipping, Fiberboard Bleached, or Dyed) , - Sealing Compound, Topcoat, Fuel Tank, Buna-N Type - Coating, Oxide, Black, For Ferrous Metals - Counters, Footwear - Cloth, Twill, Cotton, 10.0 ounces - Lasts, F
9、ootwear, Shoe, Safety-Toe, Mens US MIL-7 - Soles and Heels, Rubber, Traction Tread, Shoe - Leather, Gusset, Chrome-tanned, Fat Liquored - Metals; Test Methods - Textile Test Methods - Leather, Methods of Sampling and Testing - Rubber; Sampling and Testing - Stitches, Seams, and Stitchings - Sampling
10、 Procedures and Tables for Inspection -y - Marking for Shipment and Storage Attributes (Copies of specifications and standards required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) -. LAW
11、S AND REGULATIONS US POSTAL SERVICE MANUAL (Copies of the manual may be obtained from the Superintendent of Documents, US Government Printing Office, Washington, DC 20402). 2.2 Other publications The following documents form a part of this * specification to the extent specified herein. indicated, t
12、he issue in effect on date of invitation for bids or request for proposal shall apply :fx:F Unless a specific issue is PI 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-21894F AMERICAN SOCIETY FOR TESTING AND MATERIALS O e B-3 6 B-134 D- 5 D
13、-4 12 D-746 D-816 D-1084 D-1610 D-2098 D-2099 D-2240 D-2813 E-28 - Brass Plate, Sheet, Strip and Rolled Bar - Brass, Wire - Penetration of Bituminous Materials - Tension Testing of Vulcanized Rubber - Brittleness Temperature of Plastics and Elastomers by Impact - Rubber Cements - Viscosity of Adhesi
14、ves - Conditioning Leather and Leather Products for Testing - Dynamic Water Resistance of Shoe Upper Leather by the Dow Corning Leather Tester - Dynamic Water Resistance of Shoe Upper Leather by the Maeser Water Penetration Tester - Indentation of Rubber by Means of a Durometer - Sampling Leather fo
15、r Physical and Chemical Tests - Softening Point by Ring and Ball Apparatus (Application for copies should be addressed to the American Society for Testing Materials, 1916 Race Street, Philadelphia, PA 19103.) AMERICAN NATIONAL STANDARDS INSTITUTE ANSI 241.1-1976 - American National Standard for Mens
16、 Safety-toe Footwear (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018). NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight Classification (Application for copies should be addressed to American Tru
17、cking Associations, Attn: Traffic Department, 1616 P Street, Washington, DC 20036.) UNIFORM CLASSIFICATION C.OMMITTEE, AGENT Uniform Freight Classification (Applicatiog for copies should be addressed to the Uniform Classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, ILL 60606.)
18、3. REQUIREMENTS 3.1 Guide sample Samples, when furnished, are solely for guidance and information to the contractor (see 6.3). Variation from this specification may appear in the sample, in wh-ich case this specification shall govern. 3.2 First article When a first article is required, it shall be i
19、nspected and approved and should be a preproduction sample. consist of one finished pair of shoes. The contracting officer should include specific instructions in all acquisition documents regarding arrangements for inspection and approval of the first article (see 4.2 and 6.2). The first article sh
20、ould -3 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2I874F 4 m 7779906 0383241 I m MIL-S-21894F 3.3 Materials 3: 3.3.1 Upper leather The uppers shall be cut from the best quality green salted chrome tanned sides. The tannery lots shall no
21、t exceed 25,000 square feet. The sides shall be full grained, 4 1/2 to 6 ounces in thickness and the area of a side shall not exceed 28 square feet. The break in vamps or quarters shall not be more than a break scale of 5 (see 4.3.5.1). Surface defects, if barely perceptabie, are permitted in cut pa
22、rts. printing of leather shall not be permitted. Cut parts with perceptable scratches, brands, open scars or light flesh cuts that show through on the grain surface of the leather shall not be used. Flanky, loose, boney, pipey, cracked or any rough or coarse grain leather shall not appear in the vam
23、ps or quarters; however, these defects may appear in the top tongue area or counter pocket. Cut parts shall be examined as specified in 4.3.2.2. Embossing or ;: 3.3.1.1 Water resistance The sides of the leather shall be treated with a suitable water resistance compound to bar water penetration and w
24、ater absorption and shall be tested as follows: ;. 3.3.1.1.1 Water penetration The leather shall withstand 4,000 Dow Corning flexes or 15,000 Maeser flexes; however, 30 percent of the samples shall with- stand not less than 1000 Dow Corning Flexes or 3,000 Maeser flexes when tested as specified in 4
25、.3.1. A 3.3.1.1.2 Water absorption The leather shall absorb not more than 30 percent of its weight after being immersed in water when tested as specified in 4.3.1. 3.3.1.2 Color and finish The leather shall be black and shall be drum dyed. buffing or snuffing to remove surface blemishes. The flesh s
26、ide of the leather shall be cleaned of coarse fibers. The contractor shall supply a certificate of compliance stating that a top finish was not applied. Colors shall be uniform. The leathe; shall be full grain and shall be finished grain side out with no * 3.3.2 The leather used for the bellows wing
27、 and eyelet facing shall be chrome-tanned, dyed black, lightly finished kidskin, water resistance treated (see 3.3.1.1). Not less than 80 percent of the samples tested shall withstand a minimum of 50 taps when tested as specified in 4.3.1. The thickness of the leather shall be a minimum of 1 1/2 oun
28、ces and a maximum of 2 1/4 ounces. As an alternate, leather conforming to treatment B of MIL-L-10867 may be used, except that the thickness shall be 2 to 2 3/4 ounces, all the specimens tested for water resistance shall withstand a minimum of 50 taps, and the requirements for stitch tear strength, s
29、hrinkage temperature, stiffness, paranitrophenol, and chemical requirements shall not apply. Bellows wing ;k 3.3.3 Vamp lining The vamp shall have a leather toe tip and leather tongue lining of soft, chrome-tanned, full grain or corrected grain cattlehide glove leather or pigskin leather. The color
30、of the leather shall be as produced by the tanning agents. of the grain surface. The leather shall be a minimum of 2 ounces and a maximum of 3 1/2 ounces in thickness. The remainder of the vamp lining shall be fabric conforming to class 2 of MIL-C-43956. Lining shall not show wrinkles or excessive f
31、ullness. A light application of dye may be used to level the color 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2L894F 4 = 9999906 0383242 3 - MIL-S-21894F 3.3.4 Heel pads The heel pads may be cut from leather specified in 3.3.3 and also f
32、rom sheepskin, kid, calf or kip with a minimum of 2 ounces and a maximum of 3 1/2 ounces in thickness. Use of leather specified in 3.3.1 is acceptable provided the top finish has been removed by buffing or splitting and the thickness is a minimum of 2 ounces and a maximum of 3 1/2 ounces. 3.3.5 inso
33、les 3.3.5.1 Leather When leather insoles are used th y shall conform to type I, class 1, tannage (a) or (b) of KK-1-570, except t E at the thickness shall be 5 1/2 to 7 1/2 irons and the requirements for paranitrophenol shall not apply 9 3.3.5.2 Synthetic (Texorist) When synthetic insoles are used t
34、hey shall be cut from Texorist material. The Texorist material shall contain 0.25 to 1.00 percent copper-8 quinoinolate uniformly distributed throughout the insole. The insole shall be 0.116 (+ 0.010) inch thick and shall be cut with the heel-to- toe direction across th; machine direction of the Tex
35、orist material. Texorist insole shall have a stuck-on rib applied to the printed side of the material (see 6.5). The 3.3.6 Leather, general Leather components are not required to contain a Fungicide treatment. However, leather -components may contain paranitrophenol fungicide provided the fungicide
36、content of the leather does not exceed 0.70 percent based on the dry weight of the leather, when tested as specified in Table VI. * 3.3.7 utsoles MIL-S-22777, As an alternate, the tread area may be of a straight bar design or of a commercial design that has been approved by the preparing activity of
37、 this specification, The rubber outsoles shall conform to type I, Grade C of 3.3.8 Heels The rubber heels shall conform to Type II, Grade A, Class 1 of MIL-S-22777. cial design that has been approved by the preparing activity of this specifi- cat ion. As an alternate, the tread area may be smooth or
38、 of a commer- * 3.3.9 Welting, vinyl black in color and may be formed with or without a storm welt of medium size bead. extensions on the finished shoes are met (see 3.7.19). The thickness of the welting shall be 0.12 to 0.13 inch. polyvinyl chloride, compounded with suitable non-bleeding plasticize
39、rs. The finished welting shall be smooth, uniform*%in texture, and free of blemishes, cracks, blisters, and other defects that might affect serviceability or appearance. when tested as specified in 4.4.1. The vinyl welting shall be of flat top design, bright The welting shall be of sufficient width
40、to assure that the required The base compound shall be virgin The vinyl welting shall conform to the requirements of table I : , . I A.- . .- I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-S-2187qF 8Li M 7777706 03832q3 5 MIL-S-21894F Table I
41、- Vinyl welting requirements Prop er t y Requirements Init ia1 Ha r dn es s 85-95 Specific gravity 1.32 maximum Brittle point, before aging -15F or less Brittle point, after aging +20F maximum change from 2100 minimum 225 minimum Tensile strength, PSI Elongation, percent Water absorption, percent ga
42、in 3.00 maximum standard brittle point t Fuel resistance (after immersion) Hardness Tensile strength, PSI Elongation, percent Volume swell, percent 55 minimum 1800 minimum 225 minimum 35 maximum 3.3.10 Counters Counters shall conform to the requirements of MIL-C-41814. 3.3.10.1 Counter sizes Counter
43、s shall be made in a sufficient number of sizes to cover shoe sizes 4 through 15 and necessary widths. conform to the shape of the MIL-7 last. Counter patterns shall assure that counters are the correct size to fill the counter pocket of the finished shoe. Counters shall 3.3.11 Adhesives 3.3.11.1 Se
44、am seal adhesive The adhesive used for sealing the inseam areas shall be one of the following: 3.3.11.1.1 Vinyl type The adhesive shall be composed of a polyvinyl butyral base and a non-bleeding phthalate plasticizer and other ingredients necessary to produce a clear colorless adhesive for the purpo
45、se intended. The adhesive shall have a minimum weight of 7.40 pounds per gallon, with a minimum total solids content of 19 percent and a viscosity of 40 to 50 seconds when tested as specified in 4.3.1. 3.3.11.1.2 Buna-N-type The adhesive shall conform to the requirements of MIL-S-4383 except that th
46、e color shall be natural or colorless. 3.3.12 Backseam tspe The backseam tape, when used, shall be l/2 or 17/32 inch wide conforming to type I, class 1 of DDD-T-86, except that the requirement for nonfibrous material shall not apply. 3.3.13 Thread 3.3.13.1 Thread, upper fitting Upper fitting stitchi
47、ng operations shall be performed using nylon thread conforming to type I, II or III of V-T-295. Colorfastness requirements shall not apply. Thread size shall be E for the needle and bobbin on stitch type 301 and E for the needle and B or E for the looper with stitch type 401. The color shall be blac
48、k. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2L74F 4 W 7779706 0383244 7 W MIL-S-21894F 3.3.13.2 Thread, Goodyear stitching Thread used for Goodyear (sole) stitch- ing shall be polyester conforming to Type I, Class 1, subclass C of V-T-
49、285. - The running thread shall be black, size 10, 3 ply. be natural, size 10, 3 or 6 ply. Colorfastness requirements shall not apply. The shuttle thread shall 3.3.13.3 Thread, inseaming, polyester The polyester inseaming thread shall conform to type I, class 1, subclass C of V-T-285. The thread shall be size 10, 3 or 6 ply and natural in color. 3.3.14 Box toes 3.3.14.1 Understructure box toe The understructure box toe shall be made of two layer
