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 4140-01-102-6145
NSN 5945-01-566-9751
NSN 5895-01-337-3140
NSN 6130-01-332-6082
NSN 5999-00-234-9210
NSN 5990-01-619-0935
NSN 6320-01-419-6416
NSN 6645-01-609-4753
NSN 5915-01-568-9078
NSN 5999-01-413-1410
NSN 6110-00-288-4179
NSN 5999-01-515-1714
Last Updated: 02/10/2025