1、M I L - M -18 371 E 17 February 1969 MILM- 1837 lD(ASG) SUPERSEDING 18 July 1966 MILITARY SPECIFICATION MIRRORS, EMERGENCY SIGNALING, MARK 3 This specification is mandatory for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope - This specification covers the requ
2、irements for two types of emergency signaling mirrors, designated as Mark 3. 1.2 Classification - The signaling mirrors shaii be of the types, as specified (see 6.2): following SIZE TYPE - 2 by 3 inches I II 3 by 5 inches 2. APPLICABLE DOCUMENTS I 2.1 The following documents of the issue in effect o
3、n date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein: SPECIFICATIONS Federa 1 DD-G-451 Glass, Plate, Sheet, Figured (Float, Flat, for Glazing, Corrugated, Mirrors, and Other Uses) RR- W-360 Wire, Fabric, Industrial w-P-553 Paper, Wra
4、pping, Tiesue PPP- B-566 Boxes, Folding, Paperboard ! r: Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIGM-18371E SPECIFICATIONS Federal (Continued) PPP-B-636 PPP- P- 291 PPP-T-45 Military MILP-116 MIL- C-
5、5040 MILM-13508 STANDARDS Federal FED-STD- 151 Military MIGSTD- 105 MILSTD-129 Box, Fiberboard Paperboard, Wrapping and Cushioning Tape, Gummed, Paper, Reinforced and Plain, for Sealing and Securing Preservation, Methods of Cord, Nylon Mirror Coating Process, Front Surfaced Aluminbed, for Optical El
6、ements Metals, Test Methods Sampling Procedures and Tables for Inspectian by Attributes Marking for Shipment and Storage (When requesting any of the applicable documents, refer to both title and number. Copies of the applicable documents required by contractors in connection with specific procuremen
7、t functions should be obtained fkom the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 First article - Unless otherwise specified, the Mark 3 emergency - signaling mirrors furnished under this specification shall be a product which has been inspected and has passe
8、d the first article inspection specified in 4.3, 4.3.1, and 4.3.2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MLLM-1837PE 3.2 Materials and components - The materials and components shall conform to the applicable specifications as listed or req
9、uired herein. 3.2.1 Glass - The glass, for fabricating the front and back of the signaling mirror, shall be annealed polished plate glass conforming to DD-(3-451, Type I, Class 1, Quality q2 - Mirror Glazing, 1/8 inch thick. One surface of the front glass, except for the center circular area, shall
10、be aluminized in accordance with MILM-13508. The humidity and salt spray requirements of MILM-13508 are applicable. 3.2.2 Wire screen - The wire screen, for fabricating the sightingdevice, shall conform to RR-W-360, Type I, Class 1, 30 by 30 Mesh, Medium Grade, Stain- less Steel or Monel Composition
11、. The wire screen shall be suitably and uniformly coated, on both sides, with wide-ane retroflecting material. The coating shall bave no deleterious effect on the wire screen, aluminized surface, or the laminant. 3.2.3 Laminant - The material, for laminating the front and back glasses together, shal
12、l be polyvinyl butyral, approximately O. 020 inch thick. The laminating material shall have no deleterious effect upon the aluminized surface or the coated wire screen. 3.2.4 Paint - Except for the circular area, the back surface and all the edges of the signaling mirror shall be covered with a suit
13、able fiat black paint that shall be resistant to humidity, temperature, and salt spray (see 3.5.5). 3.2.5 Cord - The cord, for fabricating the lanyard, shall conform to MIL-C-5040, Type I. 3.3 -.Design - The signaling mirrors shall consist of two iayers of the glass, laminated together, with a sight
14、ing device and a lanyard. The mirrors shall conform in appearance to Figures 1 and 2, as applicable. 3.4 Construction - The mirrors shall be constructed in accordance with Figures 1 through 3, as applicable. 3.4.1 Sighting device - The sighting device shall be a circular disc of the wire screen cont
15、aining a centered sighting hole, 1/4 21/32 inch in diameter, for both types of the mirrors. The outside diameter shall be 1-1/8 51/32 inch for the Type I and 1-3/8 *1/32 inch for the Type II mirror. 3.4.2 Assembly - The two thicknesses of the glass, with the sighting device between them, shall be su
16、perimposed, one over the other, ao that all the edges and the center circular clear areas, for the eighting device, coincide. The centered sightinghole shall be located as specified in Figures 1 and 3, as appli- cable. Thebackglass shall be laminated to the aluminized surface of the front glass with
17、 the laminating material. The laminating material shall be cut to the size Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-1837LE 63 979470b 0237057 2 W T - MIL-M-18371E required for the particular type mirror and shall contain a centrally loca
18、ted hole which shall be concentric with the clear area of the front and back glasses. The laminating material may flow into the edges of the sighting device, provided the plastic material is not visible, when looking through the sighting device. The sighting device shall be flat, not wrinkled, and t
19、he visible portion of the mesh shall not be filled. The mirrors shall not contain any bubbles, voids, unbonded areas, blisters, .or dirt (lint, dust, haze, or gray surfaces) between the inner surface of the glasses and the laminating material. The edges of the mirror shall be free from voids, area n
20、ot filled flush to the edge with the laminating material, and chips. 3.4.3 Lanyard - A four foot length of the nylon cord shall be passed through the hole and the ends shall be tied together with a square knot for suspending the mirror from the neck of the user. The ends of the cord shall be seared
21、to pre- vent raveling and no sharp edges shall be formed. The lanyard shall be fabricated from one continuous length of the cord. . 3.5 Performance inspections - 3.5.1 Flatness - Any bow of the front surface of the mirror shall not exceed O. 020 inch, when inspected as specified in 4.6.2. 3.5.2 Clar
22、ity of vision - There shall be no obstruction or distortion of vision, when any object is viewed through the sighting device as specified in 4.6.3. 3.5.3 Reflectivity - The mirror shall have not less than 75 percent reflectivity for white light, when inspected as specified in 4.6.4. 3.5.4 Impact res
23、istance - When inepected as specified in 4.6.5, the front glass shall not crack or break. 3.5.5 Exposure cycle - When inspected as specified in 4.6.6, the mirror shall not crack or break. There shall be no evidence of delamination, fogging or crazing of the aluminized surface, corrosion or distortio
24、n of the sighting device, or erosion of the lettering or the black painted surface. The mirror shall then be inspected and shall conform to the requirements for clarity of vision, 3.5.2, and reflectivity, 3.5.3. 3.6 Markings - The instruction and identification markings shall be legible and durable
25、orange letters and numerals, which shall be thoroughly dry prior to packaging. The markings shall conform to and shall be located as speci- fied in Figures 1 and 2, as applicable. 3.7 Workmanship - The mirrors shall not contain any crack, chip, break, sharp edge, unspecified hole, spot, sWn, nick, s
26、cratch, or area of delamiaa- tion Because of the emergency use of this equipment, the importance of p:noviding a product of uniform excellent quality cannot be overemphasized. The mirrors Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-1A371E 6
27、3 H 977990b 0237058 4 i MIL-M-1837J.E shall be uniform in quality and shall be free from irregularities or defects which could adversely affect performance, reliability, or durability. The signaling mirrors shall conform to the quality and grade of product established by this speci- fication. The oc
28、currence of defects shall not exceed the acceptance criteria estab- lished herein. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection - Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as speci
29、fied herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless dis- approved by the Government. The Government reserves the right to perform any of the insp
30、ections set forth in the specUication where such inspections are deemed necessary to aasure stipplies and services conform to prescribed requirements. 4.2 Classification of insaection - The examination and testing of the signaliog mirrors shall be classified as follows: (a) First article inspection
31、- First article inspection consists of examinations and tests performed on samples dch are representative of the production item after award of a contract to determine that the production item conforms to the requirements of this specification (see 3.1 and 4.3 through 4.3.2). k b ) Quality conforman
32、ce inspection - Quality conformance in- spection consists of examinations and tests performed on individual products or lots to determine conformance of the products or lots with the requirements set forth in this specification (see 4.4 through 4.4.1.2). 4.3 First article inspection - The firstartic
33、le inspection of the Mark 3 emergency signaling mirrors shall consist of examinations and tests for ail of the requirements of this specification. 4.3.1 First article samples - Unless otherwise specified, as soon as . practicable after the award of the oontrwt or prder, the manufacturer shall submit
34、 six signaihg mirrors of each type specified in the contract. The samples sW be . -representative of the construction, workmanship, components, and materials to be used during production. When a contractor is in continuous production of these mirrors from contmt to contmt, submission of further firs
35、t article inspection samples on the new contract may be waived at the discretion of the procuring activity (see 6.2). Approval of the first article inspection samples or the waiving of the first - * article inspection does not preclude the requirements for performing the quality Provided by IHSNot f
36、or ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-18371E conformance inspect ion. The first article inspection samples shall be furnished to the Government as direoted by the contracting officer (see 6.2). 4.3.2 Upon completion of the first article inspection, all t
37、he applicable inspection reports and when applicable, recommendations and comments pertinent for use in monitoring prochiction will be forwarded to the cognizant Government activity. One of the approved first article inspection sample mirrors of each type, as applicable, will be returned to the manu
38、facturer for use in monitoring production. The other five mirrors of each type, as applicable, will be destroyed in the first article inspection and shall not be considered a8 part of the quantity to be delivered under the contract. 4.4 Quality conformance inspection - The sampling and inspection le
39、vels shall conform to MIL-STD-105. The quality conformance inspection shall . consist of the following: Visual examination of the mirrors Dimensional check of the mirrors Flatness Clarity of vision Reflectivity Impact resistance Preparation for delivery 4.4.1 Sampling - 4.4. i. 1 Inspection lot - 4.
40、4.1.1. 1 Mirrors - An inspection lot size shall be expressed in units of one mirror .of one type made essentially under the same conditions and from the same materials and components. The sample unit shall. be one mirror of one . - type. 4.4.1.1.2 Preparation for delivery - An inspection lot size sh
41、all be ex- pressed in units of one fully prepared shipping container, containing mirrors of one type, fully prepared for delivery from essentially the same materials and components. The sample unit shall be one shipping container, containing mirrors of one type, fully prepared for delivery with the
42、exception that it need not be seded. 4.4.1.2 Samplinp for examinations and tests of the mirrors - The sample . size, acceptance criteria, examinations, and tests required for the mirrors shali be as spmified in Table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
43、ense from IHS-,-,-_ MIL-M-18371E 63 W 777770b 02370b0 2 PARAGRAPH SAMPLE INSPEC TION SIZE REQUIREMENT METHOD isual 3.4 through 4.5.1.1 Inspection mination 3.4.3, 3.6, 3.7, and Level II and Figures 1 Table 11 through3, as applicable MIL-M-1837 1E ACCEPTANCE CRITERIA L/ An acceptable quality level of
44、2.5 defects per 100 units for major defects and an accept- able quality level of 4.0 defects per 100 Dimensional :heck I 1 I I unitsfor minor defects. 3.4.1, 3.4.3, -4.5.1.1 Inspection An acceptable quality andFigures1 and Level S-3 level of 4. O defects through3, as Table II per 100 units Flatness
45、Clarity of vision Reflectivity applicable 3.5.1 4.5.2 Inspection An acceptable quality Level II level of 1.5 defects per 100 units 3.5.2 4.5.3 Every Reject all defective mirror units 3.5.3 4.5.4 Inspection An acceptable quality Level 11 level of 1.5 defects per 100 units Impact resistance 3.5.4 4.5.
46、5 Inspection An acceptable quality Level II level of 1.5 defects per 100 units Preparation for delivery Section 5 4.5.1.2 Inspection An acceptable quality and Level 5-2 level of 2.5 defects Table IV per 100 units Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
47、om IHS-,-,-MIL-M-18371E 63 7799706 0237063 4 = - - - - MIL-M-18371E 4.5 inspection methods - 4-50 1 Visual examination - 4.5.1.1 Mirrors - Each of the mirrors of one type, selected as a sample unit from the lot, shall be thoroughly checked dimensionally and examined visually to determine conformance
48、 to this specification. The classification and list of defects, Tables I and Iil, as applicable, shall be used to classify and enumerate the defects found. TABLE II CLASSIFICATION OF DEFECTS FOR THE VISUAL EXAMINATION OF THE MIRRORS DEFECT a. b. C. d. e. f. g* h. i. Any scratch on the front surface
49、or discolored or cwed aluminized surface; any spot or stain, chip, crack, sharp edge, nick, void, unbonded area, blister, unspecified hole, broken mirror, or any area of delamination Any edge not rounded or smooth Top and bottom edges do not coincide Any cut end of the lanyard nQt seared or contains any sharp edge; ends not tied together as specified or lanyard is not fabricated from one continuous piece of thecord Any laminating
