Model: A11900
Optical Element RetainerSpecial Features:
Material is per astm-a569 or astm-a366; surface treatment is per tt-e-489
Properties:
A cylindrical, externally threaded item having a centrally located hole specifically designed to retain by means of either a raised box (shoulder), or counterbore, countersink, or a similar shaped recess, an optical element such as a lens, reticle, cell, and the like, in optical assemblies. It must have drilled holes or slots to facilitate assembly and disassembly. For items which house the optical element(s), and form the internal or central portions of an optical system, see cell, optical element. Excludes ring, externally threaded.
Part A11900 NSN 1240-01-187-1085
Material Classification
Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicatorsPackaging & Shipping
Freight Classification
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Schedule B and Export
- Schedule B: 9803200000
- SITC: 93100
- End Use: Military apparel and footwear
- NAICS: 990000
- USDA: 1
Freight Class: Military equipments not identified by kind
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