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Optical Flat NSN 5210-01-129-9262

Item Description

A flat, transparent piece of glass, generally of fused quartz, with one or both principal surfaces polished to within a few millionths of an inch of a true plane. It is used in conjunction with a monochromatic light source to measure the flatness of precision finished surfaces, and to determine the distance and parallelism between precision finished surfaces by comparison with known standards. In operation the flat is superimposed, reference surface downward, on the parts under test and when illuminated by monochromatic light the rays reflected from the reference surface are either reinforced or neutralized by the rays reflected from the surface under test producing interference bands which reveal any variations in the thickness of the film of air between surface under test and the flat. Excludes optical parallels.

NSN 5210-01-129-9262 NSN: 5210-01-129-9262

Features and Characteristics

Diameter
1.250 inches
Thickness
0.500 inches
Case
Provided
Working Surface Flatness Accuracy
0.00000004 inches
Material
Quartz, fused
Material
Quartz, fused
FSC
5210 Craftsmen's Measuring Tools
NIIN
011299262
NSN
5210011299262

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
OP-2B
Cage Code:
62679
Status:
A
MSDS:

Q & A

Frequently asked questions for NSN 5210-01-129-9262
What are the manufacturers of nsn 5210011299262?
Does this nsn 5210011299262 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5210011299262
A flat, transparent piece of glass, generally of fused quartz, with one or both principal surfaces polished to within a few millionths of an inch of a true plane. it is used in conjunction with a monochromatic light source to measure the flatness of precision finished surfaces, and to determine the distance and parallelism between precision finished surfaces by comparison with known standards. in operation the flat is superimposed, reference surface downward, on the parts under test and when illuminated by monochromatic light the rays reflected from the reference surface are either reinforced or neutralized by the rays reflected from the surface under test producing interference bands which reveal any variations in the thickness of the film of air between surface under test and the flat. excludes optical parallels.
Does nsn 5210011299262 contain any precious metals?
No precious metal content.
Does nsn 5210011299262 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5210011299262?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
18274
FIIG:
T303-J
App. Key:
JA
Cond. Code:
1
Status:
A

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