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Optical Element Retaining Ring NSN 1240-00-768-8717

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 1240-00-768-8717 NSN: 1240-00-768-8717

Features and Characteristics

Thread Class
2a
Thread Direction
Right-hand
Groove Diameter
Between 1.207 inches and 1.217 inches
Thread Length
0.296 inches
Overall Length
0.399 inches
Outside Diameter
Between 1.310 inches and 1.315 inches
Thread Size
1.203 in.-48
Aperture Diameter
Between 0.947 inches and 0.950 inches
Inner Groove Width
Between 0.056 inches and 0.070 inches
Screw Thread Series Designator
Uns
Mounting Configuration
Internal thread
Thread Location
Internal
Internal Flange Thickness
Between 0.036 inches and 0.044 inches
Groove Location
Adjacent to internal flange
Knurled Periphery
Not provided
Special Features
Chamfer 0.020 in. By 45 degrees on id of flange end. One slot 0.062 in. Wide, 0.060 in. Deep by 45 degrees on face of flange end.
Material
Aluminum alloy, qq-a-225/3, alloy 2011, t3
Material
Aluminum alloy, qq-a-225/3, alloy 2011, t3
Surface Treatment
Anodized, mil-a-8625, type 1, class 2, black
Surface Treatment
Anodized, mil-a-8625, type 1, class 2, black
Fsc Application Data
Periscope, tank
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
007688717
NSN
1240007688717

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
7688717
Cage Code:
19200
Status:
A
MSDS:
Part Number:
1240007688717
Cage Code:
A00AM
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 9803200000
  • NAICS: 990000
  • SITC: 93100
  • Description: Military equipments not identified by kind
  • End Use (Code 50060):
    Military apparel and footwear

Q & A

Frequently asked questions for NSN 1240-00-768-8717
What are the manufacturers of nsn 1240007688717?
Does this nsn 1240007688717 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240007688717
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 1240007688717 contain any precious metals?
Precious metal content is unknown.
Does nsn 1240007688717 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240007688717?
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
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