Part Number
Part Number:
NSN:
NIIN:
Item Name:
WINDOW , OPTICAL INSTRUMENT
Definition:
A COLOR FREE ITEM OF TRANSPARENT OR TRANSLUCENT MATERIAL, USUALLY OPTICAL GLASS, HAVING SPECIFIC LIGHT DISPERSIVE AND REFRACTIVE PROPERTIES. THIS ITEM MUST HAVE TWO PLANE-PARALLEL SURFACES AND IS DESIGNED FOR USE IN AN OPTICAL INSTRUMENT TO PROVIDE A BARRIER TO FOREIGN MATTER AND/OR PERMIT LIGHT TRANSMISSION IN OR TO THE OPTICAL SYSTEM.
CAGE Information
Code | Company |
---|---|
19200 | U S ARMY ARMAMENT RESEARCH & DEVELOP |
Federal Supply Class
Title
OPTICAL SIGHTING AND RANGING EQU
Inclusions:
INCLUDES PERISCOPES FOR SUBMARINES; RANGE AND HEIGHT FINDERS; TELESCOPIC SIGHTS; OPTICAL INSTRUMENTS INTEGRATED WITH FIRE CONTROL EQUIPMENT.
Exclusions:
Characteristics (Decoded)
MRC | Requirements Statement | Clear Text Reply |
---|---|---|
AGYE | SURFACE FINISH | GROUND AND POLISHED |
ABNM | THICKNESS | 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
MATL | MATERIAL | GLASS, OPTICAL, MIL-G-174, GRADE D, TYPE 523-586 |
ABMZ | DIAMETER | 1.740 INCHES MINIMUM AND 1.745 INCHES MAXIMUM |
BMSM | POLISHED PERIPHERY | PROVIDED |
AJEF | BEVEL DEPTH | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM |
BMSG | POLISHED SURFACE | BOTH |
BMSP | BEVEL ANGLE IN DEG | 42.000 MINIMUM AND 48.000 MAXIMUM |
FEAT | SPECIAL FEATURES | ELEMENT IN ACCORD WITH SPEC MIL-O-13830; SPHERICAL POWER NOT TO EXCEED 3 FRINGES,ASTIGMATISM 2 FRINGES; LIGHT DEVIATION NOT TO EXCEED 2 MINUTES (0.033 DEG) OF ARC; SURFACES QUALITY 80-50; USED ON PERISCOPE AND HOWITZERS M109A2 AND M109A3 |