1、- MIL-L-4LLSH 3 7977706 037LL97 2 0 i e MIL-L-41815H 7 April 1936 SUPERSEDING MIL-L-41815G 5 February 1981 MILITARY SPECIFICATION LASTS, FOOTWEAR, COMBAT, U.S., MIL-5 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This documen
2、t covers plastic footwear lasts used in the manufacture of combat boots. k 1.2 Classification. The lasts shall be of one type in the following sizes and widths as specified (see 6.2): TABLE I. Schedule of sizes S chedu 1 e of widths 3 3% 4 4% 5 5% 6 6% 7 7% 8 8% 9 9% 10 10% 11 11% 12 12% 13 13+ 14 x
3、xxxxxxx xx xx xx xx xx x XN N xx xx xx xx xx xx x x x x x x x x x x x NR xx xx xx xx xx x- - - - - R xx xx xx xx xx xx x x x x x x x x x x x RW xx xx xx xx xx x- - - -.- W xx xx xx xx x.x xx x x x x x x x x x x x xw xx xx xx xx xx xx x x x x x x x x x x x - - - - - - - - - - Beneficial comments (rec
4、ommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Natick Research, Development and Engineering Center, Natick, MA 01760-5014 by using the self-addressed Standardization Document Improvement Proposal (DD Form 14
5、26) appearing at the end of this document or by letter. AMSC N/A FSC 8335 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. THISDOCUMENT XQNTANS- / 8 PAGES Licensed by Information Handling ServicesMIL-L-4LLSH 3 M 9773706 0373200 5 = MIL-L-4 18 15H .2. APPLICABLE DOCUM
6、ENTS k 2.1 Government documents. Unless otherwise specif-ad, the following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this document to the extent specified herein. SPECIFICATIONS FEDERAL V-T-276 - Thread, Cotton CCC-C-467 - Cloth, Burlap,
7、Jute (or Kenaf) PPP-B-640 - Boxes, Fiberboard, Corrugated, Triple-Wall STANDARDS FEDERAL FED-STD-751 - Stitches, Seams, and Stitchings MIL I TARY MIL-STD-105 - Sampling Procedures and Tables for Inspection MIL-STD-129 - Marking for Shipment and Storage MIL-STD-130 - Identification Marking of U.S. Mi
8、litary Property MIL-STD-147 - Palletized Unit Loads MIL-STD-731 - Quality of Wood Members for Containers and Pallets by Attributes (Copies of documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the con
9、tracting officer.) 2.2 Other publications. Unless otherwise specified, the following documents of the issue in effect on date of invitation for bids or request for proposal form a part of this document to the extent specified herein. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 1248 e Polyeth
10、ylene Plastics Molding and Extrusion Materials E 18 - Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materiais (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Technical society and technical a
11、ssociation documents are generally available for reference from libraries. and using Federal agencies.) They are also distributed among technical groups 2 Licensed by Information Handling ServicesMIL-L-4LLSH 3 W 7777906 0393203 7 m MIL-L-41815H 2.3 Order of precedence. In the event of a conflict bet
12、ween the text of this document and the references cited herein (except for associated detail specifi- cations, specification sheets or MS standards), the text of this document shall take precedence. Nothing in this document, however, shall supersede applicable laws and regulations unless a specific
13、exemption has been obtained. 3. REQUIREMENTS 3.1 Guide sample. Samples, when furnished, are solely for guidance and information to the contractor (see 6.3). appear in the sample, in which case this document shall govern. Variations from this document may 3.2 First article. When specified in the cont
14、ract or purchase order, a sample shall be subjected to first article inspection (see 4.3, 6.2, and 6.6). 3.3 Material (see 6.7). 3.3.1 Polyethylene blocks. The lasts shall be made from polyethylene blocks. The polyethylene blocks shall be made from solid high density polyethylene without fillers, co
15、nforming to type III or IV category 4 or 5 of ASTM D 1248 except that the density of type IV shall not exceed 0.965. The color shall be the standard color used by the contractor. material or reground scrap material of the same composition produced by regrinding clean unburned scrap produced in the f
16、abrication of last blocks, finished lasts, and imperfect lasts. Scrap containing dirt or other foreign material shall not be used. The blocks shall be made from virgin 3.3.2 Metal hinges. The metal hinges shall be a commercial type made of steel and zinc chromated to-resist moisture. 3.3.3 Hinge pin
17、s. The hinge pins shall be made of steel wire and shall be heat treated to a hardness value of 45 to 50 Rockwell C scale of ASTM E 18. The pins shall be not less than 15/64 inch nor more than 19/64 inch in diameter. The pins shall be countersunk under the surface of the sides of the lasts. pins shal
18、l be zinc chromated to resist moisture and shall be mechanically peened. The 3.3.4 Thimble. The thimble shall be manufactured from steel sheet or tubing stock and shall be heat treated to a hardness value of 55 to 88 Rockwell B scale of ASTM E 18. The thimble shall be of the drawn, split, or swagged
19、 tubing type, All thimbles shall be full-flanged with a closed or a partially closed bottom and shall be the locked-in type. Dimensions for last thimbles shall correspond to the following: Inside diameter Overall length Depth of hole Wall thickness Flange diameter 0.500 + 0.046 inch 1.625 7 0.063 in
20、ches 1.500 7 0.063 inches 0.0475+ 0.095 inch 0.750 - +-0.063 inch 3 Licensed by Information Handling ServicesI MIL-L-4115H 3 9999906 0391202 9 = MIL-L-41815H 3.3.5 Heelplate. The heelplate shall be not less than 3-1/8 inches long on size 8R, shall measure proportionate to normal grade on other sizes
21、, and shall have a 1/2 + 1/32inch hole in the center for insole tacking and five counter- sunk nail holes as specified in 3.5.3. The heelplate shall be made from either hot-galvanized or electro-galvanized sheet steel 0.050 2 0.005 inch thick, and shall be treated to a hardness value of 48 to 67 Roc
22、kwell B scale of ASTM E 18, 3.3.6 Heelplate attaching nails. The nails for attaching the heelplate to the lasts shall be 15 or 16 gage, 5/8 to 3/4 inch long, barbed, iron wire nails with 1/8 + 1/32 inch diameter flat heads; shall have a ringed chisel point; and shall not-be cement coated f inish. 3.
23、3.7 Ink. Ink for marking the lasts shall be black, shall not blur, shall meet the Eking adhesion requirements in 3.9.1, and shall be set permanently into the lasts by heat. 3.4 Models, patterns, and templates. 7: 3.4.1 Turning models. Turning models for each size and width required will be furnished
24、 by the Government (see 6.4). Turning models shall be in whole size in widths XN, N, NR, R, RW, W, and XW, with the final measurements for the lasts of that size plainly marked on each model. Only two sizes shall be turned from any model up to size 12, namely, the model size and one half size up. No
25、 last shall be turned from a model of a different width. Sizes larger than 12 shall be turned from the size 12 models. 3.4.2 Replacement of turning models. Models worn to the point of unservceability in the production of properly graded lasts will be replaced by the Government. All models shall be r
26、eturned to the Government at the close of the contract. Worn models that need replacement shall be marked “Uns e rv i ceab 1 e 3.4.3 Last bottom patterns. Necessary turning bottom patterns and finished bottom patterns, marked to indicate all pertinent measurements in geometric points, will be loaned
27、 to the contractor by the Government (see 6.4). When prehinging method is used, the turning bottom patterns do not apply. 3.4.4 Templates. Templates for use in checking the lasts will be loaned to the contractor by the Government (see 6.4). 3.5 Construction. 3.5.1 Hingecutting, slotting, and assembl
28、y. The hinge V-cut and circle sawcut shall correspond to the hinge pin holes so that the last, with a correctly inserted hinge, will open and close in a satisfactory manner. All inside sharp corners on the lasts shall have a slight radius made by running 4 Licensed by Information Handling Services M
29、IL-L-43LSH 3 W 777770b 0373203 O W MIL-L-41815H 0ve.r the edge with a hot wire to eliminate stress risers made by cutters during the hhge cutting operation. eliminate stress risers shall be permitted. As an alternate, the equipment and method used for prehinging is permitted. The use of a radius gro
30、und cutter to 3.5.2 Thimble hole. The thimble hole shall be bored to such a size that when the thimble is inserted in the last, it shall be locked into the plastic. Thimbles shall be countersunk on lasts. On sizes 7-1/2 through 12 (all widths), the thimble holes shall be centered 1-1/2 + 1/16 inches
31、 from the back of the last top. On sizes below 7-1/2 and above 12; the holes shall be centered 1-3/8 2 1/16 and 1-5/8 2 1/16 inches respectively, from the back of the last top. 3.5.3 Heelplating. The heelplate on the finished last shall be flush with, but not overlaying, the outside edge of the Past
32、. A narrow margin of plastic, having a maximum width of not more than 1/16 inch in the curved area beginning 3/8 inch from the breast line of the plate, is acceptable. The margin of plastic in the area 3/8 inch from the breast line on each side of the plate is not limited. The breast line of the hee
33、lplate shall butt up to the plastic. The heelplates shall be attached with five of the nails specified in 3.3.6. The position of the heel nails shall be according to commercial practice with five countersunk nail holes punched not less than 3/8 inch nor more than 5/8 inch from the edge of the plate,
34、 except that the two front nail holes shall be not less than 3/16 inch nor more than 3/8 inch from the breast of the heelplate, nails and the back nail. inch tack hole located approximately in the center of the heelplate, measuring both from the breast to the end of the heelplate and from side to si
35、de. The heelplates shall be cupped to conform to the contour of the heel seat of the las t. The side nails shall be located equidistant between the breast The heelplates shall be punched with a 1/2 2 1/32 3.5.4 Heel and toe making. The heel and toe shall be shaped following the heel and toe profile
36、templates as specified in table II. A tolerance of 1/2 size either upward or downward will be permitted in the applicable width for the toe. A TABLE II. Heel and toe templates Sizes Widths 3 3% 4 4% 5 5% 6 6% 7 7% 8 8% 9 9% 10 1035 11 11% 12 12% 13 13% 14 XN - - - 10 11 12 13 14 15 16 17 18 19 20 21
37、 22 23 24 25 26 27 28 N 8 9 10 11 12 i3 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 NR 9 10 11 12 13 14 15 16 17 18 19 - R 10.11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 RW 11 12 13 14 15 16 17 18 19 20 21 - W 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 3
38、2 33 34 XW 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 - - - - - - - - - - - - 5 Licensed by Information Handling ServicesMIL-L-qLBLSH 83 W 773770b 0373204 2 MIL-L-41815H NOTE: Identical template numbers are for the same template regardless of width. The adjacent templates a
39、re to be used for the tolerance for a given template, i.e., the tolerance for template 20 is 19 and 21. 3.6 Measurements and grading. The contractor shall check the turning models but shall make no modifications except for slight adjustments to fit the turning model bottom to the paper last bottom p
40、atterns furnished by the Government when this may be necessary due to swelling of the wood. The finished lasts shall conform.to the templates listed in table II and to the measurements tested in table III. The tolerance for the finished stick length shall be - + 1 point and for ball, waist, instep,
41、and heel girth shall be + 2 points. bottom patterns furnished by the Government with tolerance of 2 1/32 inch in length and + 1/48 inch in width, All dimensions, except tolerances for bottom length and Width, shall be taken 6y means of sticks and tapes whose calibrations are geometrically graded and
42、 which will be loaned by the Government (see 6.4). Finished last bottoms shall conform to measurements of f inished-last k TABLE III. Geometric measurements of U.S. MIL-5 lasts (see 6.5) Sizes Widths 3 3-1/2 4 4-1/2 5 5-1/2 6 6-1/2 7 7-1/2 8 8-1/2 XN- Ball - - 988 993 998 1003 1008 1013 1018 1023 -_
43、 - Waist - - - - 988 993 998 1003 1008 1013 1018 1023 Instep - - - - 1006 1011 1016 1021 1026 1031 1036. 1041 Hee 1 - - - - 1146 1151 1156 1161 1166 1171 1176 1181 Length - - - - 1082 1087 1092 1097 1102 1107 1112 1117 N- Ball 988 993 998 1003 1008 1013 1018 1023 1028 1033 1038 1043 Waist 988 993 99
44、8 1003 1008 1013 1018 1023 1028 1033 1038 1093 instep 1006 1011 1016 1021 1026 1031 1036 1041 1046 1051 1056 1061 Heel 1132 1137 1142 1147 1152 1157 1162 1167 1172 1177 1182 1187 Length 1064 1069 1074 1079 1084 1089 1094 1099 1104 1109 1114 1119 6 I- Licensed by Information Handling ServicesMIL-L-Lt
45、LLSH 83 9999906 0391205 MIL-L-41815H TABLE III. Geometric measurements of U.S. MIL-5 lasts (see 6.5) (contd) Sizes Widths 3 3-1/2 4 4-1/2 5 5-1/2 6 6-1/2 7 7-1/2 8 8-1/2 NR- Ball 998 1003 1008 1013 1018 1023 1028 1033 1038 1043 1048 - Waist 998 1003 1008 1013 1018 1023 1028 1033 1038 1043 1048 - ins
46、tep 1016 1021 1026 1031 1036 1041 1046 1051 1056 1061 1066 - Heel Leng th R Ball Waist Ins tep Hee 1 Leng th RW Ball 1135 1140 1145 1150 1155 1160 1165 1170 1175 1180 1185 - 1065 1070 1075 1080 1085 1090 1095 1100 1105 1110 1115 - 1008 1013 1018 1023 1028 1033 1038 1043 1048 1053 1058 1063 1008 1013
47、 1018 1023 1028 1033 1038 1043 1048 1053 1058 1063 1026 1031 1036 1041 1046 1051 1056 1061 1066 1071 1076 1081 1138 1143 1148 1153 1158 li63 1168 1173 1178 1183 1188 1193 1066 1071 1076 1081 1086 1091 1096 1101 1106 1111 1116 1121 1018 1023 1028 1033 1,038 1043 1048 1053 1058 1063 1068 - Waist 1018
48、1023 1028 1033 1038 1043 1048 i053 1058 1063 1068 - instep 1036 1041 1046 1051 1056 1061 1066 1071 1076 1081 1086 - Heel 1141 1146 1151 1156 1161 1166 1171 1176 1181 1186 1191 - Length 1067 1072 1077 1082 1087 1092 1097 1102 1107 1112 1117- - W- Ball 1028 1033 1038 1043 1048 1053 1058 1063 1068 1073
49、 1078 1083 Waist 1028 1033 1038 1043 1048 1053 1058 1063 1068 1073 1078 1083 instep 1046 1051 1056 1061 1066 1071 1076 1081 1086 1091 1096 1101 Heel 1144 1149 1154 1159 1164 1169 1174 1179 1184 1189 1194 1199 Length 1068 1073 1078 1083 1088 1093 1098 1103 1108 1113 1118 1123 7 Licensed by Information Handling ServicesMIL-L-4LBLSH 83 m 7777706 037L206 6 m MIL-L-41815H TABLE III. Geometric measurements of U.S. MIL-5 lasts (see 6. (contd Sizes Widths 3 3-1/2 4 4-1/2 5 5-1/2 6 6-1/2 7 7-1/2 8 8-1/2 .xw Ball 1048 1053 1058
