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 5895-01-188-8820
NSN 6110-01-583-6526
NSN 5935-00-837-2759
NSN 5920-00-130-3593
NSN 5975-01-182-5806
NSN 5935-00-151-4910
NSN 5985-01-656-0174
NSN 6685-01-388-7802
NSN 5965-00-317-1679
NSN 5935-00-358-1113
NSN 5999-01-423-1030
NSN 2925-01-548-6674
Last Updated: 02/05/2025