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Optical Element Retaining Ring NSN 1240-00-177-0659

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 1240-00-177-0659 NSN: 1240-00-177-0659

Features and Characteristics

Thread Class
2b
Thread Direction
Right-hand
Groove Diameter
2.218 inches
Thread Length
0.171 inches
Overall Length
0.297 inches
Outside Diameter
2.562 inches
Thread Size
2.437-32
Aperture Diameter
2.125 inches
Inner Groove Width
0.0930 inches
End Application
Gun sight mk29
Screw Thread Series Designator
Uns
Thread Location
Internal
Internal Flange Thickness
0.064 inches
Groove Location
Inside face of flange
Knurled Periphery
Not provided
Material
Brass, ww-t-791, grade 2, type a
Material
Copper alloy 330
Surface Treatment
Any acceptable
FSC
1240 Optical Sighting And Ranging Equipment
NIIN
001770659
NSN
1240001770659

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
654745
Cage Code:
10001
Status:
A
MSDS:
Part Number:
265200
Cage Code:
56232
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 1240-00-177-0659
What are the manufacturers of nsn 1240001770659?
Does this nsn 1240001770659 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 1240001770659
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 1240001770659 contain any precious metals?
No precious metal content.
Does nsn 1240001770659 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 1240001770659?
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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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
  •   Quality Fast Service
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