1、 INCH-POUNDA-A-59519December.7,1999SUPERSEDINGMIL-L-27885November 25, 1985COMMERCIAL ITEM DESCRIPTIONLAST, FOOTWEAR FWU-5/PThe General Services Administration has authorized the use of this commercial item description for allFederal agencies.1. SCOPE. This commercial item description covers the requ
2、irements for plastic shoe lasts used in themanufacture of quick-donning, lined and insulated flight boots, type FWU-5/P. The lasts are designatedas type FWU-5/P plastic.2. CLASSIFICATION. The lasts shall be furnished in the following sizes and widths:Schedule of sizes5 6-1/2 8 9-1/2 11 12-1/25-1/2 7
3、 8-1/2 10 11-1/2 136 7-1/2 9 10-1/2 12 13-1/2Schedule of widthsAA A B C D E EE EEEBeneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which mayimprove this document should be sent to: Defense Supply Center Philadelphia, Clothing and TextilesDirectorate, Attn
4、: DSCP-CR, 700 Robbins Avenue, Bldg. 6D, Philadelphia, PA 19111-5092.AMSC N/A FSC 8335Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5951923. SALIENT CHARACTERISTICS3.1 Materials.3.1.1 Polyethylene blocks. The lasts shall be made from polyethyle
5、ne blocks. The polyethylene blocksshall be made from high-density polyethylene without fillers, density 0.941 to 0.965, grade 4 or 5, meltindex 1.9 or less when tested as specified in ASTM-D-1248. The color shall be the standard colorused by the contractor. The blocks shall be made from virgin mater
6、ial, or a mixture of virgin material andreground scrap material.3.1.2 Metal hinges. The metal hinges shall be commercial type, zinc-chromated steel, resistant tomoisture, and shall be mechanically peened.3.1.3 Hinge pins. The hinge pins shall be made of steel wire and heat-treated to a hardnessvalue
7、 of 45 to 50 Rockwell C when tested as specified in ASTM-E-18. The pins shall be not less than15/64 inch or more than 19/64 inch in diameter. The pins shall be countersunk 1/4 + 1/8 inch under thesurface of the side of the last3.1.4 Thimbles. The thimbles shall be manufactured from steel sheet, bar,
8、 or tubing stock, and shall betreated to a hardness value of 55 to 85 Rockwell B scale when tested as specified in ASTM-E-18. Thethimbles may be made of the drawn, split, bored, or swaged tubing type. All thimbles shall be full-flanged with a closed or partially closed button, and shall be the lock-
9、in type. Dimensions for the lastthimbles shall be in accordance to the following dimensions and when tested as specified in ASTM-E-18.Inside diameter 1/2 +1/64 inchOverall length 1-5/8 + 1/16 inchesDepth of hole 1-1/2 + 1/16 inchesWall thickness 0.0475 to 0.095 inchFlange diameter 3/4 + 1/16 inchFla
10、nge thickness 75 to 100 percent of wall thickness3.1.5 Heelplates. The heelplates shall be not less than 3-1/8 inches long on size 8-D, shall measureproportionate to normal grade on other sizes, and shall have a 1/2 inch hole in the center for insoletacking and five countersunk nail holes. The heelp
11、lates shall be made from either hot galvanized orelectrogalvanized sheet steel, 0.050 + 0.005 inch thick. The heelplate shall be heat treated to a hardnessvalue of 48 to 57 Rockwell B scale when tested as specified in ASTM-E-18.Provided by IHSNot for ResaleNo reproduction or networking permitted wit
12、hout license from IHS-,-,-A-A-5951933.1.6 Plastic plugs. The plugs shall be of the same material as the body of the lasts or other plasticmaterial having Shore Durometer hardness value of not less than 60-D scale when tested as specified inASTM-D-2240. The plugs shall be 1/2 + 1/32 inch in diameter
13、and 3/8 + 1/16 inch long. The heel plugmaterial shall be a force fit in the drilled tack holes and shall show no evidence of splitting. Testing shallbe as specified in paragraph. 5.3.1.3.1.7 Heelplate attaching nails. The nails for attaching the heelplate on the last shall be 15 or 16 gage,5/8 to 3/
14、4 inch long, barbed, iron wire nails, with a 1/8 + 1/32 inch diameter flat heads and ringed chiselpoints and shall not be cement-coated finished.3.1.8 Ink. Ink for marking lasts shall be black, shall not blur, and shall have sufficient permanence tomeet specified requirements.3.2 Finish. The last sh
15、all be clean, free of plastic hairs, strings, flash, or sprues, and have no prominentturning gouges of any kind on the surface. All sharp edges in V-cut or saw-cut shall be given anoticeable radius. The marking and writing on finished last shall show no change in appearance whentested as specified i
16、n paragraph 5.3.2. The finished last shall show no chipping or cracking, nor bedeformed so as to be unserviceable when tested by impacting with the eight-pound ball as specified inparagraph 5.3.3. The finished last shall show no cracking, breaking, chipping or other defect whichwould make the last u
17、nserviceable when the last is broken and reclosed 100 times when tested asspecified in paragraph 5.3.4. The finished last shall show no splitting, chipping, cracking or other defectswhich would render the last unserviceable when tested with insole tacks as specified in paragraph 5.3.5.Depressions, b
18、umps or holes of any kind arising from improper turning or interior voids in the blockwhich appear at last surface shall be cause for rejection.3.3 Measurements. The finished last shall conform to the measurements specified in Table I. Variationsin the girth measurements for the ball, the waist, and
19、 the instep shall not exceed 1/16 inch. Finished lastbottom shall have a tolerance of + 1/32 inch in the length and + 1/48 inch in the width.TABLE I. Finished measurements (inches)Size Width Ball Waist Instep Stick88888888AAABCDEEEEEE8-3/88-9/168-3/48-15/169-3/169-7/169-5/89-13/168-5/168-1/28-11/168
20、-7/89-1/89-3/89-9/169-3/48-5/88-13/168-11/168-7/89-1/89-3/89-9/169-3/48-1/88-1/88-1/88-1/88-1/48-3/88-1/28-5/8Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5951943.4 Grading. The bottom of the lasts shall grade 1/16 inch between widths. The len
21、gth of the bottomsshall grade up and down from the “E” model as follows: EE model, 1/24 inch longer; EEE model, 2/24inch longer, D model 1/24 inch shorter; C model; 2/24 inch shorter; B model, 2/24 inch shorter; Amodel, 2/24 inch shorter, and AA model, 2/24 inch shorter.3.5 Marking.3.5.1 Size and wi
22、dth of stamping. The heel part of the saw cut shall be clearly and legibly rubber-stamped with the correct size of the last. The stamping shall be placed on the left side of the hinge cutand shall start not more than 3/16 inch from the bottom saw cut. The correct alphabetic width (AA, A,B, C, D, E,
23、or EEE) of the last shall be clearly and legibly rubber-stamped on the heel part of the sawcut and shall be placed so that the bottoms of the letters are within 1/16 inch of the top of the last. Thesize and width shall be clearly and legibly die stamped (incised) on the forepart of the last in the t
24、ip linearea, for example (10-1/2 AA).3.5.2 Marking for identification. An identifying inscription shall be marked (incised) with a die stamp onthe outside surface of the heel of each last using not less than 3/8 inch nor more than inch characters.The inscription shall be as follows:TYPE NO. FWU-5/PU
25、.S.In addition, the name or symbol of the manufacturer shall be die stamped on the inside surface of theheel part of each last.4. REGULATORY REQUIREMENTS. The offeror/contractor is encouraged to use recoveredmaterials to the maximum extent practicable, in accordance with paragraph 23.403 of the Fede
26、ralAcquisition Regulation (FAR).5. QUALITY ASSURANCE PROVISIONS5.1 Product conformance. The contractor shall meet the salient characteristics of this commercial itemdescription, conform to the producers own drawings, specifications, standards, and quality assurancepractices. The Government reserves
27、the right to require proof of such conformance.5.2 Visual examination. Each last shall be examined for the defects listed below.5.2.1 Defects.Finish contains plastic hairs, strings, flash or sprues; depressions, bumpsholes or void; prominent turning gouge on surface.Provided by IHSNot for ResaleNo r
28、eproduction or networking permitted without license from IHS-,-,-A-A-595195Construction and any surface of last that will come in contact with the shoe;workmanship any part misplaced or out of alignment; heel end and forepart oflast not joined flush; any part not a good flush fit where required;any
29、part loose; any part not recessed in plastic where required, ornot recessed to the specified dimension; any operation omitted ornot properly performed; any functioning part that will not operateas required; any part missing or damaged; any nail missing; headbent over, or protruding; more than one na
30、il misplaced; margin ofplastic along back and side edges of heelplate beginning 3/8 inchfrom breast line in more than 1/16 inch.Marking omitted, incorrect, illegible, incomplete, not accomplished inspecified manner, size of characters not as specified; not in properlocation.5.3 Testing.5.3.1 Test fo
31、r composition plastic heel plug. The plastic heel plug in the finished last shall be subjectedto the insertion of a 2-1/2 ounce shoe tack for at least 1/4 inch. The last shall be examined for evidenceof the plastic heel splitting.5.3.2 Test for resistance to acetone. The finished last shall be wet i
32、n a test area including marking withacetone for 5 minutes. The finish shall be tested by attempting to scrape through the test area with thethumbnail. The last shall be examined for softening of the finish, change in the marking and change inappearance from adjacent finish.5.3.3 Impact on plastic la
33、sts. The finished last shall be tested by dropping an 8-pound solid iron or steelball so as to strike the last in the following spots. (The ball shall be dropped from a height of two feet,measured between the bottom of the ball and the point of impact on the last):a. With the last resting on its sid
34、e, the ball shall strike over the rear hinge pinhole and at the edge of the ball line midway between the hinge and the toe.b. With the last resting on the heel end, the ball shall strike the last on the tip ofthe toe.Tests shall be repeated three (3) times in each spot. In the (a) position, repeat o
35、n both the outside andinside of the last. The last shall be inspected for breaking, splitting, cracking, or other defects renderingthe last unserviceable, other than directly at the impact area.NOTE: The last may conveniently be held by a large C-clamp between the thimble and the heel plateand shall
36、 be placed on a concrete floor.5.3.4 Test of hinge. The last shall be placed on a regular last spindle and shall be broken and reclosed100 times. This may be done by hand or by an appropriate hydraulic or mechanical mechanism.Provided by IHSNot for ResaleNo reproduction or networking permitted witho
37、ut license from IHS-,-,-A-A-5951965.3.5 Test for resistance to tacks. The finished last shall be tested by driving 2-1/2 ounce insole tacksinto the bottom surface of the last, 1/4 inch in from the edge, around the periphery from inside to outsideball area. The tacks shall be driven 1/4 inch deep and
38、 shall be spaced 1/2 inch apart.5.4 Acceptance criteria. Acceptance criteria shall be as specified in the contract or purchase order.6. PACKAGING6.1 Preservation, packing, and marking. The preservation, packing, and marking shall be as specified inthe contract or order.7. NOTES7.1 Source of Governme
39、nt documents. Copies of military and Federal documents are available from:Standardization Documents Order DeskBldg. 4D700 Robbins AvenuePhiladelphia, PA 19111-50947.2 Source of non-Government documentsASTM-D-1248 - Specification for Polyethylene Plastics Molding andExtrusion MaterialsASTM-D-2240 - T
40、est for Rubber Property Durometer HardnessASTM-E-18 - Test for Rockwell Hardness and Rockwell SuperficialHardness of Metallic Materials(Applications for copies should be addressed to American Society for Testing and Materials, 100 BarrHarbor Drive, West Conshohocken, PA 19428.)7.3 Suggested sources.
41、 In a limited market search for lasts that meet the salient characteristicsof this commercial item description, the following manufacturers are listed below. It must be noted thatthis list is not all-inclusive and that there may be other manufacturers in the marketplace with a suitableproduct.Jones
42、and Vining, Braintree, MA 02184Seano Custom Lasts, Manchester, NH 03103Sterling Last Corporation, Rockville, NY 11570Vulcan Corporation, Cincinnati, OH 45202Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-595197MILITARY INTERESTS:Custodians CIVIL AGENCY COORDINATINGACTIVITY:Air Force - 99 GSA - FSSReview Activities: PREPARING ACTIVITY:DLA - CTAir Force 45, 82Project 8335-0186Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
