1、Y - MIL-G-5485D m 9999906 3829247 433 m I I NCH-POUND I MIL-G-5485D 22 February 1993 SUPERSEDING MI L-G-5485C 23 April 1971 MILITARY SPECIFICATION GLASS, LAMINATED, FLAT, BULLET-RESISTANT This specification is approved for use by all Depa and Agencies of the Department of Defense. .rtments l. SCOPE
2、1.1 Scope. This specification covers the requirements for bullet resistant glass in aircraft windscreen and other similar applications. 1.2 Classification. The bullet resistant glass is c fol lows : Type I - Regular ground (see 3.9.1.1). lassified by type as Type II - Precision ground (see 3.9.1.2).
3、 O 2. APPLICABLE DOCUMENTS 2.1 Government documents. * 2.1.1 Specifications, standards and handbooks. The following specifications, standards and handbooks form a part of thi S document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the
4、issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the sol ici tation (see 6.2d). SPECIFICATIONS FEDERAL A-A-55057 - Panels, Wood/Wood Based, Construction and ,. Decorat i ve Beneficial comments (recommendations, additions, deletions) a
5、nd any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Air Warfare Center Aircraft Division Lakehurst, Code SR3, Lakehurst, NJ 08733-5100, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of
6、 this document or by letter. AMSCI NA FSC 9340 a DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-5485D DD-G-451 - TT-“572 - PPP-6-585 - PPP-6-591 - PPP-6-601 - PP
7、P-8-62 1 - PPP-T-60 - MILITARY MIL-P-1 16 - MIL-L-10547 - STANDARDS MILITARY MIL-STD-105 - MIL-STD-129 - MIL-G-5485D Glass, Float or Plate, Sheet, Figured (Flat, For Glazing, Mirrors and Other Uses) Wood-Preservative, Water-Repel lent Box, Wood, Wirebound Boxes. Shipping, Fiberboard, Wood-Cleated Bo
8、xes, Wood, Cleated Plywood Box, Wood, Nailed and Lock Corner Tape, Packaging, Waterproof Preservation, Methods of Liner, Case and Sheet, Overwrap, Water Vaporproof or Waterproof, Flexible Samp Attr Mark ling Procedures and Tables for Inspection i bu tes ing for Shipment and Storage . Y (Unless other
9、wise indicated, copies of federal and military specifications, standards, and handbooks are avai lable from the DODSSP - Customer Servi ce, Standardization Documents Order Desk, 700 Robbins Avenue, Building 40, Philadelphia, PA 19111-5094.) * 2.2 Non-Government pub1 ications. The fol lowing document
10、s form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the i ssue of the DoDISS cited in the solicitation. Unless otherwise specified, the issues of the documents not listed in the DoOISS are th
11、e issues of the documents cited in the solicitation (See 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM C 1036-90 - Standard Specification for Flat Glass. ASTM D 1003 - Haze and Luminous Transmittance of Transparent Plastics (Application for copies should be addressed to the American S
12、ociety for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) 2 ! Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-5485D O UNIFORM CLASSIFICATION COMMITTEE, AGENT Uniform Freight Classification Rules (Application for copies should
13、 be addressed to the Uniform Classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents may be available in or through lib
14、raries or other informational services.) ., * 2.3 Order of precedence. In the event of a confl ict between the text of this document and the references cited herein (except for related associated detai 1 specifications, specificatignsheets or MS standards), the text of this document takes precedence
15、 Nothing in this document, however, supersedes applicable laws and regulations unless .specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When sp6cified by the acquisition activity (see 6.21111, the bullet resistant glass shall- be subjected to the first article inspection (se
16、e 6.3) in accordance with 4.3. 3.1.1 Ballistic requirement. when specified by the acquisition activity, a ballistic requirement shall be included. The acquisition activity shall include all pertinent instructions for test and evaluation of the glass (see information and use in 6.6. 0 6.2j ) . A bal
17、1 i stic requirement and ,test procedure are, rncl uded for 3.2 Material s. * 3.2.1 Glass plies. The glass plies used in the lamination shall be specially selected polished plate or float glass conforming to Type I., Class 1, quality - q3 of DO-G-451 or Type I, class 1, quality - 93 of ASTM C 1036.
18、The pl ies shall be annealed, semi -tempered or tempered as spec-if i ed ( see 6.2g). * 3.2.2 Interlayer. Unless otherwise specified by the acquisition activity (see 6.2k), the transparent interlayer plastic shall be polyvinyl butyral plasticized with either 21.0 * 2 parts by.weight triethylene glyc
19、gl 2-di-ethyl butyrate or 19.0 * 1 part by weight di-n-hexyl adipate per 100 p,arts of the resin. The manufacturer shall identify and provide traceability for the plasticizer used in the laminate interlaye (see 4.3.1). The material used shall be stable without edge seal ing and sha,ll have the neces
20、sary binding characteristics as evidenced by conformance, tothe requirements of this specification.: 3.3 Construction. The bullet resistant glass shall consist-of two or more plies held together by the transparent plastic interlayer. 3.3.1 Bal1,istic resistance characteristics. Figure 1 shall be use
21、d for design in determining the ballistic resistance characteristics required of the square footjinch of thickness) specified in Figure 1 should be an acceptable laminated glass. Laminated glass constructed to the weight ratio (pounds per ballistic resistant product. 3 Provided by IHSNot for ResaleN
22、o reproduction or networking permitted without license from IHS-,-,-MIL-G-5485D m 999990b L829250 T08 m MIL-G-5485D t O CD O ln II) W n b u W -J- Cu z PI c O ,ln- W J 4 O r( 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-5485D m 9999906 1829
23、251 944 m MIL-G-54850 3.3.2 Plastic edges. When specified by the acquisition activity, the laminated glass shall be furnished with extended plastic edges with or without reinforcement (see 6.21). 3.3.2.1 Partinq medium. A parting medium shall be used during fabrication to reduce or prevent bonding o
24、f the glass plies to the extended plastic edge only, to a specific portion of the interlayer only, or to both the plastic edge and interlayer when so specified on the applicable drawing (see 6.2). 3.4 Dimensions. Laminated glass shall be furnished in lengths and widths as specified. Unless otherwise
25、 specified in the cntract or order, thickness shall be in accordance with Table II (See 6.2g). 3.5 Tolerances. shal shal cons 3 acti 3.5.1 Thick,ness. The tolerance on the thickness of the final assembly 1 be as specified on the contract or order (see 6.29). The tolerance 1 i be plus from the basic
26、dimensionand shall be held to a minimum stent with sound manufacturing practices. 5.2 Length and width. Unless otherwise specified by the acquisition ity (see 6.2f). a length or width tolerance of 0.063 inch (1.6 mm) shall v- be permi tted . 3.6 Finish. Unless otherwise specified, all edges of the l
27、aminated glass shall be ground, with no plate underlapping another more than 0.078 inch (2 mm). All edges shall have a ground satin finish. Unless otherwise specified shall be chamfered from 0.032 to 0.063 inch (0.8 to 1.6 mm). in the acquisition drawing, (see 6.21, all sharp edges, including corner
28、s, 3.7 Glass quality. Defects, including biow-ins up to 0.25 inch deep by inch (6.4 by 25.4 mm) long, or flake chips along the edge which do not impa the strenqth of the qlass and do not cause objectionable reflections or 1 ir scattering of light shall be permissible over-the area of the glass cover
29、ed by the mounting frame and extending 0.25 inch (6.4 mm) inboard. Defects over the remaining area of.the glass shall be permissible as shown in Table I. 3.7.1 Critical sighting area. The critical sighting area of Type II laminates (see 3.9.1.21 shall contain no defects which may impair the utility
30、of this area for use in conjunction 3.8 Marking. Individual glass the acquisition activity (see 6:2i with the gunsight (see 6.4). th 3.9 Performance. 3.9.1 Optical deviation. laminates shall be marked as specified by 3.9.1.1 Type I. Unless otherwise specified by the acquisition activity, le optical
31、deviation of parallel light at normal incidence to the glass shall of the glass, except for a 1 inch in 4.5.2.1. not exceed 3 minutes of arc over the-area O (25.4 mm) margin at the edge when tested 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI
32、L-G-5Y85D m 7999906 L827252 880 m MIL-G-5485D TABLE I. Glass defects. Defect L/ Size Small cullets (1.6 mm) Dirt spots 0.063 inch Slight inclusions less than di ame ter Light fingerprints (6.4 mm) Traces of crayon 0.25 inch Light scratches less than 1 onq Fine lint or hair less than 0.5 inch (12.7 m
33、m) long Light plastic rubs Light surface sleeks (76 mm) long Light scratches 3 inches or streaks less than Vents Any size Vee edge chips S tones Remarks Permissible - provided the defects are not so clustered as to obstruct vision and they occur only occasion- ally in critical areas. Larger defects
34、of the same type shall be cause for rejection if they reduce vi si bi 1 i ty, cause noticeable di stor- tion or are grouped to form an objectionable pattern. Permissible - Provided the defects do not impair visibility and do not occur in a critical area. Not permitted - any foreign material not spec
35、ified above is also not permi tted. 1/ Defects are defined in DD-G-451, ASTM C1036 and 6.5 of this specification. 3.9.1.2 Type II. The optical deviation of parallel light at normal incidence in the critical sighting area, as specified in the acquisition drawing (see 6.21, shall not exceed 31.5 secon
36、ds of arc (60 second wedge angle). The optical deviation outside the critical sighting area shall conform to the requirements for Type I laminates. The critical sighting area shall be that area of the glass laminate over which the gunsight optical reflection occurs, or if a gunsight equipped with a
37、separate reflector is used, that area which lies in the projection of the reflector along the line of sight. 3.9.2 Optical distortion. The optical distortion requirements for the bullet resistant laminates shall be as specified by the acquisition activity (see 6.2h), when tested in accordance with 4
38、5.3. 3.9.3 Flatness. When determined as specified in 4.5.4, .the surfaces of the critical area of Type II laminates shall be optically flat with a minimum radius of curvature of 500 feet (152.4 meters). 3.9.4 Thermal stability. The bullet resistant glass shall not crack, cloud, delaminate or show o
39、ther visual evidence of deterioration after testing as specified in 4.5.5. z O e e 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-the next highe.s 1 umi nous transm acquisition act MIL-G-5485D * 3.9.5 Luminous transmittance. The parallel luminous
40、transmittance of the bullet resistant,glass, as furnished and after being subjected to the exposure nominal or actual thicknesses exceed those designated in Table II, values for test (4.5.61, shall be not less than the values given in Table II. When t thickness shall be used. Surface coating to incr
41、ease the ittance shall not be used unless specifically authorized by the ivi ty * TABLE II. Luminous transmittance at normal ,incidence. Nominal thickness Inch mm o. so O. 75 1 .o0 1-25 1 .so 1.75 2 .o0 2.25 2.50 2.75 3.00 12.7 19.0 25.4 31.8 44.5 57.2 63.5 69.9 76.2 38.1 so. a I Percent mi ni mum 8
42、1 78 76 73 70 68 66 63 60 56 58 3.9.6 Ball impact. .The laminate,. after testing in 4.5.7, shall show no delamination along any crack or fracture line which extends over 0.125 inch (3.2 mm normal to the crack or fracture line. The spalling off of a cone shaped mass opposite the point of impact shall
43、 be disregarded. Delamination shall be any visible parting of the glass from the interlayer plastic observable by ref 1 ected 1 i ght . 3.9.7 Workmanship. Workmanship shall be in accordance with high grade aircraft glass manufacturing practice required by this specification. 4. QUALITY ASSURANCE PRO
44、VISIONS * 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, t
45、he contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deem
46、ed necessary to ensure supplies and services conform to prescribed requirements. O 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-G-5485D 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The insp
47、ection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that al 1 products or supplies submi tted to
48、the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of known defective material, either indicated or actua
49、l, nor does it commit the Government to accept defective material. * 4.2 Classification of inspections. The inspect herein are classified as follows: ion requirements spec ified a. First article inspection (see 4.3) b. Quality conformance inspection (see 4.4). 4.3 first article inspection. When specified (see 6.2n1, a first article sample shall be subjected to all the tests and visual examinations in this specification. 4.3.1
