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Optical Element Retaining Ring NSN 6650-00-499-2802

Item Description

A cylindrical item having an internally flanged diameter designed to retain a lens or window in the objective end, or a diopter scale at the viewing end of an optical instrument. It may have one or more of the following characteristics: internal thread or machined for a press fit, method of securing, and/or knurled periphery. For externally threaded items, see retainer, optical element. Excludes cell, optical element; nut, plain knurled; nut, plain round; and ring, retaining.

NSN 6650-00-499-2802 NSN: 6650-00-499-2802

Features and Characteristics

Thread Class
3b
Groove Diameter
3.270 inches
Thread Length
0.472 inches
Overall Length
2.343 inches
Outside Diameter
4.688 inches
Thread Size
3.250 in.-32
Aperture Diameter
2.954 inches
Inner Groove Width
0.060 inches
Screw Thread Series Designator
Uns
Thread Location
Internal
Internal Flange Thickness
0.219 inches
Groove Location
Inside face of flange
Knurled Periphery
Not provided
Special Features
32 pitch anti-reflection thread inside surface of both ends, six ea holes 0.1540 in. Dia. Drilled through external flange, external flange has two ea rectangle milled areas 1.812 in. From center of ring diameter to outer edge offlange and 1.000 in. Wide, 1 ea hole 0.110 in. Dia. Drille through external flange, 2 ea holes 0.188 in. Diameter drilled through body of ring
Material
Aluminum alloy, qq-a-225/8
Material
Aluminum alloy 6061
Surface Treatment
Anodized black
FSC
6650 Components And Accessories Test Equipment Optical Instruments
NIIN
004992802
NSN
6650004992802

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
C685-17
Cage Code:
34228
Status:
A
MSDS:
Part Number:
012522
Cage Code:
34228
Status:
A
MSDS:
Part Number:
C687-17
Cage Code:
34228
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 9018500000
  • NAICS: 339115
  • SITC: 87225
  • Description: Other ophthalmic instruments and appliances and parts and accessories
  • End Use (Code 21610):
    Medicinal equipment

Q & A

Frequently asked questions for NSN 6650-00-499-2802
What are the manufacturers of nsn 6650004992802?
Does this nsn 6650004992802 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 6650004992802
A cylindrical item having an internally flanged diameter designed to retain a lens or window in the objective end, or a diopter scale at the viewing end of an optical instrument. it may have one or more of the following characteristics: internal thread or machined for a press fit, method of securing, and/or knurled periphery. for externally threaded items, see retainer, optical element. excludes cell, optical element; nut, plain knurled; nut, plain round; and ring, retaining.
Does nsn 6650004992802 contain any precious metals?
No precious metal content.
Does nsn 6650004992802 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 6650004992802?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
22585
FIIG:
T271-J
App. Key:
JC
Cond. Code:
2
Status:
A

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  •   Certificate of Conformance
  •   Quality Inspected Parts
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