Features
2b thread class, 3.270 inches nominal outside diameter.
Ring, objective focus.
Includes quality control certificate of conformance.
Specifications
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Thread Pitch Diameters:
+3.1389/+3.1459 inches
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Thread Size:
3.1750-18
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End Application:
An/pvs-20; night vision sight, crew served
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Screw Thread Series Designator:
Uns
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Drive Type:
Knurl
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Thread Location:
Internal
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Part Name Assigned By Controlling Agency:
Ring, objective focus
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Federal Supply Class (fsc):
Night vision equipment, emitted and reflected radiation
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National Stock Number (nsn):
5855-01-503-6171