5325-01-041-4587 RING,RETAINING Index 2350-01-041-4590 HOWITZER,MEDIUM,SELF-PROPELLED

National Stock Number:
6650-01-041-4589

Federal Supply Class:
6650

National Item Identification Number:
010414589

Description:
LENS,OPTICAL INSTRUMENT

Detail:
An unmounted, transparent, color free lens which may be treated with a low reflection coating to increase light transmission. Includes single and compound elements. For items having two plane parallel surfaces, see WINDOW, OPTICAL INSTRUMENT. Excludes RETICLE, OPTICAL INSTRUMENT.


Manufacturer Information:
1055341819200US ARMY ARDEC RDECOM


Techincal Specification:
AXIAL THICKNESS0.785 INCHES MINIMUM AND 0.805 INCHES MAXIMUM
BACK FOCAL LENGTH5.021 INCHES
DIAMETER3.494 INCHES MINIMUM AND 3.497 INCHES MAXIMUM
EQUIVALENT FOCAL LENGTH5.289 INCHES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-174, GRADE C, TYPE 523-586 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALGLASS OPTICAL
SINGLE LENS STYLEDOUBLE CONVEX


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