1、 3 MIL-V-85374(AS) MIL-V-5374 (1) 4 W 7777906 044b520 3 _ _ f AMENDMENT 1 9 January 1981 MILITARY SPECIFICATION VISORS,SHATTER RESISTANT This amendment forms a part of Military Specification MIL-V-85374(AS) , dated 13 December 1979. PAGE 1 2.1 SPECIFICATIONS: - MILITARY Delete the following: “MIL-V-
2、22272 Vi sor, Protective, Helmet“ PAGE 8 4.3.1, line 12: Delete “Code 4041“ and substitute “Code 6021“. PAGE 9 4.6.1.3, lines 1, 2, 3, 4: Delete second and fourth sentence. PAGE 15 4.6.8, Delete and substitute the following: “4.6.8 Abrasion Resistance. The haze and luminous transmittance of the coat
3、ed specimens shall be determined before and after the abrasion test as specified in FED-STD-406, Method 3022. The abrasion test shall be performed by rubbing with a specially standardized eraser mounted as illustrated in figure 3 and held approximately normal to the visor. The device and eraser mate
4、rial indicated in figure 3 shall be used for this test. The eraser shall be rubbed across the surface of the coated visor from one point to another, over the same path, for 20 complete cycles with a force of 2.0 to 2.5 pounds continuously applied. rubs of about 1 inch length are preferred. completed
5、, the lens shall be thoroughly cleaned to remove dirt, film, fingermarks and grease marks using a mild detergent and water followed by drying with a soft cloth or lens tissue. The visor shall meet the requirements specified in 3.4.7.“ Whenever possible, After rubbing has been -z- 0Miin.d from 1=. =-
6、 I- GLOBAL ENGINEERING DOCUMENTS -. - (714) 261-1455 (800) 854-7179 - - = ZM5 Y&tw A., pi“. CA 92714 - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-5374 (II) 4 777770b OY4b521 5 i MIL-V-85374(AS) AMENDMENT 1 PAGE. 15 4.6.9, Delete and subs
7、titute the following: “4.6.9 Adhesion Test Method. The specimens shall be subjected to humidity tests as specified in MIL-STD-810, Method 507, for 120 hours (five cycles), Inmediately upon removal from the humidity chamber, the samples shall be dried with a cotton cloth and then subject to the adhes
8、ion test. A test tape (3M 670, 202, 218, 232 or equivalent), with an adhesion rating of 40 ounces per inch of width, shall be firmly applied to the front surface of the visor. The area covered shall be 2 square inches. using a snapping motion applied 90 to the specimen. separate locations shall be m
9、ade using this method. meet the requirements specified in 3.4.8.“ The tape is then removed Two trials at The visor shall PAGE 16 4.6.12, line 2: Delete “Figure 3“ and substitute “Figure 4“. Following page 16: Add new Figure 3. PAGE 17 Change I Fi gure 3“ to “Fi gure 4“ . Preparing Activity Navy (AS)
10、 (Project No. 8475-N168) Page 2 of 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-O w n O pi :t a 3 o d pc *US. GOVERNMENT PRINTING OFFICE: 1981 - 703-023/908 Page 3 of 3 a m k al u2 cd k w .- s! O v1 .A 2 P 4 k Q, k w 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
