A-A-50444
position, the point of the pin shall be adequately covered to protect operating personnel. The pin shall be mounted on the case in such a manner that the major axis of the pin is parallel to the axis of the case. There shall be no movement of the pin in excess of 3/16 inch in a direction parallel to its major axis. The point of the pin shall point toward the closed end of the case. When secured to a fabric the light shall be capable of withstanding a pull of 50 pounds without becoming detached. The screw threads on the case shall be smooth and close fitting.
7. The les shall be clear and shall be of a molded plastic compound with a heat distortion of not less than 170 oF. The lens shall have a domed shape so proportioned that the light issuing from the completely assembled lighted unit shall have a beam width of not less than 180 degrees measured on any plane through the axis of the lens. Actual configuration of the lens design as to surface curvatures and fluting shall be at the option of the manufacturer.
8. A suitable capacitor-discharge sealed flashtube module with dimensions as noted in figure 1, shall provide intermittent flashes of light and shall be compatible with the lens so that the light is emitted over a 180 degree angle, measured on a plane perpendicular to the long axis of the lens. The surface underneath the flashtube shall be a highly polished reflective material. The flashtube shall have an operating life span of not less than 200 hours before wearout failure occurs. With a fresh battery, the module shall have a minimum initial flash rate of 50 per minute at 70oF and a 1.8 effective candelas minimum, and will be expected to perform for a minimum ten hours continuous service with the specified battery.
9. Metallic components of the item shall be electrically conductive, corrosion resistant material or treated adequately to be corrosion resistant.
10. The weight of the light, without battery, shall not exceed 6 ounces.
11. Exterior metal parts shall, whenever possible, be given a black oxide finish.
12. Each light shall have a legible waterproof label providing the following information: manufacturer’s name, national stock number (NSN), contract number, and manufacturer’s model number.
13. A 100 hour salt spray test shall be conducted on the assembled light including the battery in accordance with ASTM B117. The unit shall show no corrosion or other damage that would appreciately affect its operation.
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