1、MIL-B-27486C - SUPERSEDING MIL-B-27486B(USAF) 14 February 1973 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: the Engineering Division, San Antonio ALC/MMEDO, Kelly AFB, TX 78241 by using the s
2、elf addressed Standardization Document Improvement Proposal. (DD Form 1426) appearing at the end of this document or by letter, MILITARY SPECIFICATION BOOTS, FLYERS FWU-3/P This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This s
3、pecification covers the requirements for material and for manufacture of a quick-donning, lined, and fully insulated flight boot, which is designated FWU-31P. 1.2 Classification. The boot shall be of one type and in the follcwing sizes and widths as specified (see 6.2). SCHEDULE OF BOOT SIZES -a Siz
4、e - 5 6 6 112 7 7 112 8 8 112 9 9 112 10 10 112 11 11 112 12 12 112 13 13 112 5 112 Width A A4 B C D E EE X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
5、X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 2. APPLICABLE DOCUMENTS 2.1 Government documents. EEE X X X X X X X X X X X X X X X X X X DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. p THIS DOCUMENT CONTAINS Tp PAGES Provided by IHSNot for ResaleNo repr
6、oduction or networking permitted without license from IHS-,-,-2.1 the fo of the specif extent MIL-B-27986C 84 W 7777906 0385687 O W MIL-B-27486C 1 Specifications and standards, Unless otherwise specified (see 6.2) lowing specifications and standards of the issue listed in that issue Department of De
7、fense Index of Specifications and Standards (DODISSI ed in the solicitation, form a part of this specification to the specified herein. SPECIFICATIONS FEDERAL V-F-106 V-L-6 1 V-T-276 V-T-2 8 5 V-T-295 KK-I -5 7 O KK-L-16 5 KK-W- 2 3 1 UU-P-268 ccc-c-443 DDD-T-8 6 PPP-B-636 PPP-T-45 MILITARY MIL-C-31
8、33 Fasteners, Slide, Interlocking. Laces , Nylon. Thread, Cotton, Thread, Polyester, Thread, Nylon. Insole, Footwear, Leather, Cattlehide. Leather, Cattlehide, Vegetable-Tanned and Chrome Retanned, mpregrated, and Soles. Welting, Leather, Shoe. Paper, Kraft , Wrapping, Cloth, Duck, Cotton (Single an
9、d Plied Filling Yarns, Flat), Tape, Textile: Cotton, General Purpose (Unbleached, Bleached, .or Dyed). . Boxes, Shipping, Fiberboard. Taped, Gummed, Paper Reinforced and P.lain, for Sealing and Securing. Cellular Elastomeric Materials, Molded or Fabri- cated Parts. MILiL-10867 Leather, Cattlehide, G
10、usset, Chrome Tanned, MIL-C-13924 Coating, Oxide, Black, for Ferrous Metals. MIL-B-17757 Boxes, Shipping Fiberboard (Modular Sizes). MIL-S-22777 Soles and Heels, Rubber, Traction Tread, Shoe. MIL-L-4 O O 5 1 Leather, Cattlehide, for Glove Leather. MIL-C-41814 Counter, Footwear. Fat 1 iquored , STAND
11、ARDS FEDERAL FED-STD-151 FED-STD-3 11 FED-STD-595 MILITARY MIL-STD-105 MIL-STD-129 Metals, Test Methods, Leather, Methods of Sampling and Testing. Color, Sampling Procedures and Tables for Inspection by Attributes. Marking or Shipment and Storage. 2 Provided by IHSNot for ResaleNo reproduction or ne
12、tworking permitted without license from IHS-,-,-MIL-STD-147 Palletized Unit Loads. MIL-STD-670 Classification System and Tests for Cellular Elastomeric Materials. MIL-STD-794 Parts and Equipment, Procedures for Packaging of, (Copies of specifications and standards required by manufacturers in con- n
13、ection with specific acquisition functions should be obtained from the con- tracting activity or as directed by the contracting officer.) 2.2 Other publications. The following document(s) form a part of this The issues of the documents specification to the extent specifiedherein. which are indicated
14、 as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. AMERICAN SOCIETY FOR TESTING MATERIALS (ASTM) B36 B134 05 D412 D570 D746 D792 D1043 D1203 D1238 D2941 E28 D3951-82 Brass Plate, Sheet, Strip, and Rolled Bar. Wire, Brass Bituminous Materials Pe
15、netration of, Rubber Properties in Tension, Test Methods for. Plastic, Water Absorption of Plastics and Elastomers, Brittleness Temperature. of, By Impact Plastics, Specific Gravity and Density of, by Displacement - Stiffness Properties as a Function of Temperature by Means of a Torsion Test, Test M
16、ethods for. Plastics Loss of Plasticizer from (Activated Carbon Methods). Flow Rates of Thermoplastics by Extrusion Plasto- meter, Test Kethods of, Heasuring of Break Pattern of Leather (Breakscale). Packaging, Comercial Apparatus, Ringand Ball, Softening Point by (Application for copies of ASTM pub
17、lications should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphis, PA 19103.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specifi- cation shall take preceden
18、ce. 3. REQUIREMENTS 3.1 Guide sample. information to the contractor (see 6.4). Variations from this specification may appear in the sample, in which this specification shall govern, Samples, when furnished, are solely for guidance and 3 Provided by IHSNot for ResaleNo reproduction or networking perm
19、itted without license from IHS-,-,-MIL-B-274bC 84 77777Ob 035b71 7 MIL-B-27486C . 3.2 First article. When specified (see 6.21, the contractor shall furnish a sample for first article inspection and approval (see 4.2 and 6.5). 3.3 Material. 3.3. the bec not exc 1 Upper leather. Vamps, quarters and ba
20、ckstays shall be cut from t quality, green-salted, chrome-tanned sides. eed 23,000 square feet. The sides shall be full grained, 3 114 to The tannery lot shall 4 112 ounces in thickness and the area of a side shall not exceed 22 square feet. The leather shall be similar in softness to elk-type sides
21、 and the break shall not be more than a break scale of 5 when tested as specified in 4.4.1. Any upper leather defect such as fat wrinkles, pit and insect damage plainly visible shall be considered as affecting appearance and shall not appear in the vamps or quarters in front of the breast of the hee
22、l. parts with scratches, slaughter cuts on the grain surface of the leather, brands ot light flesh cuts that show through on the grain surface shall not be used. Flanky, pipey, loose, cracked or any rough or coarse grain leather shall not appear in the counter area back of the breast of the heel or
23、in the tongue or backstay, Clusters of veins, split veins or pronounced veins shall not appear in the vamps or quarters, Cut 3.3.1.1 Color and finish. The leather shall be black and shall be drum The leather shall be full grain and shall be finished grain side out dyed, with no buffing to remove sur
24、face blemishes. finish containing only a sufficient amount of pigment to assist in obtaining a uniform color shall be applied and the surface brought to a smooth finish. The flesh side shall be cleaned of coarse fibers. Fungicide paranitrophenol treatment is not required, A light application of blac
25、k * 3.3.2 Slide fastener unit, The slide fastener unit shall be from leather conforming to type II, class A of MIL-L-40051, except that the requirements for crocking, stiffness, shrinkage, temperature, elongation, stitch tear strength and chemical requirements shall not apply, Thickness of the leath
26、er shall be 2 112 to 3 112 ounces and color shall be black. * 3.3.2.1 Top band, The top band shall be cut from leather conforming to type II, class A of MIL-L-40051, except that the requirements for crocking, stiffness, shrinkage temperature, elongation, stitch tear strength and chemical requirement
27、s shall not apply. Top band stripping of one inch width shall be used and thickness shall be 2 to 2 112 ounces. The color of the leather shall be black, As an alternate, leather specified in 3.3.1 may be used for the top band and the thickness shall be 2 to 2 112 ounces, 3.3.3 Gusset. The gusset sha
28、ll be cut from leather conforming to treat- ment C of MIL-L-10867, The color shall be black, 3.3.4 Lining leather. The quarter, vamp and tongue (gusset) linings shall be cut from soft chrome tanned, full grain or corrected grain, cattlehide - glove leather, 2 112 to 3 112 unces in thickness. The Col
29、or-shall be gray, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-27486C approximately matching color number 36492 of FED-STD-595. otherwise inferior cut parts shall be used. ment is not required. from 2 114 to 3 114 ounces thick, full grain ch
30、rome tanned or chrome vegetable retanned pigskin. The pigskin shall be drum dyed gray approximately matching color number 36492 of FED-STD-595. side with a light application of aniline finish or on the flesh side shall be smooth plated. cuts, off stretch, or otherwise inferior cut parts shall not be
31、 used. No loose, flanky or Fungicide paranitrophenol treat- As an alternate to the above, the linings may be cut The pigskin shall be finished on the grain- Slaughter The finished surface shall be worn next to the foot. 3.3.5 Insoles. The insoles shall conform to type I or III tannage a or b of KK-1
32、-570, and the thickness shall be 5 112 to 6 112 irons. The insoles shall have either a channeled or stuck on rib (see 3.3.11). As an alternate the insoles may be cut from Texorist material. contain 0.25 to 1.00 percent Copper 8 Quinolinolate uniformly throughout the insole. The insole shall be 0.116
33、 (+ ,010) inches thick, The insole shall be cut with the heel-to-toe direction across the machine direction of the Texorist material. The Texorist insole shall have a stuck on rib applied to the printed side of the material. The Texorist material shall 3.3.6 Midsoles. The midsoles shall conform ot t
34、ype I, class 3, style 1, .ubclass (b-L-165 and shall be 5 to 6 irons in thickness. * 3.3.7 Heel pads. Heel pads shall be of russet sheepskin leather, natural kip, or calf, with a minimum thickness of 2 ounces and a maximum thickness of 3 112 ounces. leather or gray side leather, as required by 3.3.4
35、 may be used. alternate to the above, the heel pads may be cut from the pigskin lining leather specified in 3.3.4. In addition heel pads cut from gray lining As an 3.3.8 Welting. The leather shall conform to the requirements of KK-iJ-231. Paranitrophenol treatment is not required. 3.3.9 Rubber. 3.3.
36、9.1 Outsoles. The rubber outsoles shall conform to type I, class 1, style 2 of MIL-S-22777. 3.3.9.2 Heels. The rubber: heels shall conform to type II, class 1, - style 2 of MIL-S-22777. 3.3.10 Counters. The counters shall be of the materials specified in 3.3.10.1 and 3.3.10.2. 3.3.10.1 Leather, leat
37、herboard, or shoeboard. The leather, leatherboard or shoeboard counters shall conform to the requirements of MIL-C-41814 except that the leather or leatherboard counters thickness shall be 5 to 5 112 irons. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
38、HS-,-,-MIL-B-27Li8bC 4 W 797970b 0385693 2 MIL-E-2 7486C 3.3.10.2 Polyethylene, The polyethylene counters shall be molded from an unfilled polyethylene resin of natural color to fit the last. The molded pieces shall be uniform in texture and finish and shall be free from porosity, cracks, blisters,
39、and any other defects affecting serviceability, The poly- ethylene resin shall conform to the requirements of Table I when tested as specified in 4.4.1. TABLE I. Requirements of polyethylene resin. Characteristic Specific gravity Melt index Tensile strength Elongat ion Stiffness modulus (torsion) at
40、 23OC Brittle Temperature (80 percent nonfailure) Water absorption, gain in weight in 24 hours Volatility loss, 72 hours at 82 oc Requirements 0.91 to 0.93 1.5 to 4.0 1400 to 2500 psi 100 to 800 percent 20,000 to 40,000 psi -76F minimum 0.14 percent maximum O, 05 percent maximum 3.3.11 Stuck on rib.
41、 The finished rib shall be 15/64 +1/64 inches high, a minimum of 518 inch in width measured from the inside vertical portion of the rib, and shall extend from heel breast line to heel breast line on the insole, The rib shall be made from coated fabric or a combination of coated fabric and fiberboard
42、. The fabric shall conform to requirements specified in 3.3.11.1, not less than 3 ply of coated fabric folded over on itself; two layers of coated fabric with a fiberboard filler not less than ,050 inch thick; or fiberboard and coated fabric. The upstanding portion of the rib shall be one of the fol
43、lowing: 3.3.11.1 Rib construction. The ribbing fabric used in the construction of the rib shall be unbleached cottcn or cotton/synthetic fabric conforming to the requirements listed below, a rubber-based adhesive specified in 3.3.14 and bonded to the flesh side of the insole, The fabric or fiberboar
44、d shall cover 5/32 (-2132 +1/32) inch of the peripheral edge and extend over the top of the vertical rib and cover the area between the ribs for a distance not less than 518 inch from the inside rib edge. the flesh side of the insole as specified above to provide the required extension on the finish
45、ed shoe. The fabric shall be coated on one side with The preformed rib shall be firmly and smoothly fitted and bonded to 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-B-27486C 84 7797706 0385674 4 _ - MIL-B-27486C Weight (ounces) per square
46、yard (min) Yarns per inch (min) - Warp -8 - 50 - Filling - 30 Breaking strength pounds (min) warp and filling - 105 3.3.11.2 Rib strength. The physical requirements for the rib strength shall conform to the following when tested as specified in 4.4.3.2.1. Character ist ic Minimum Average Shear stren
47、gth 70 pounds 75 pounds Stitch strength 20 pounds 30 pounds - l/ No single determination shall fall below the value specified and the average of all specimens shall not be less than the average specified. * 3.3.12 Slide fastener. The slide fastener shall conform to type I, style 3, size MS of V-F-10
48、6. components with a black chemical finish. As an alternate, class 301, 302 and 430 corrosion resisting steel may be used for catch lever only. fastener shall have a short pull tab with the slot opening 5/16 (+_1/16)inch wide by 7/32 (+1/32) inch high. minimum of 12 pounds, and the scoop slippage sh
49、all be a minimum of 13 pounds. The slide fastener shall have a brass chain and The individual scoop pull off shall be a 3.3.12.1 Slide fastener tape. The fastener tape shall be nylon and shall be dyed black to match the upper leather. As an alternate, 100% polyester fastener tape may be used provided it meets or exceeds all other slide fastener and slide fastener tape requirements specified in MIL-B-27486 and amendment 1 and V-F-106E. The tape s
