Glass, optical, mil-g-174, grade c, type 517-645 or 523-586. Both surfaces polished and coated with magnesium fluoride, rim and chamfers ground. Dimensions, 5.000 in. O/a lg, 3.875 in. O/a w, 0.125 in. Thick, both ends rounded on a 1.937 in. Radius. Two mtg slots along each side of length 0.125 in. W, 0.156 in. O/a depth on 0.625 in. Mtg centers. All edges chamfered 0.010 in. By 45 deg. Furnished with 2 gaskets.
No other part numbers with same form, fit, and function found.
NSN 5905-01-025-0281
NSN 6105-01-411-5617
NSN 6135-01-282-4326
NSN 5945-00-631-3565
NSN 5910-01-262-2938
NSN 5895-01-502-5519
NSN 5975-01-124-0848
NSN 5985-01-211-6549
NSN 5935-01-599-6045
NSN 5999-01-391-7003
NSN 4140-00-704-7615
NSN 5895-00-677-9114
Last Updated: 04/28/2024