Optical Element Retaining Ring

(NSN) National Stock Number
1240-01-291-7137
Federal Supply Classification
1240 Optical Sighting and Ranging Equipment
Item Name Code
22585
Schedule B Code
9803200000
Summary

2b thread class, +4.1313 to 4.1700 inches thread pitch diameters, right-hand thread direction, 4.180 inches nominal groove diameter, 0.450 inches nominal overall length, 4.290 inches nominal outside diameter

DAC HCC DMIL RNCC
A - - 5
RNVC SADC MSDS RNAAC
9 - - TX
Identification

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.

INC FIIG Concept Condition
22585 T271-J - 2
Specifications
Thread Class
2b
Details A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
Thread Pitch Diameters
+4.1313 to 4.1700 inches
Details The minimum and maximum pitch diameter limits of a straight screw thread.
Thread Direction
right-hand
Details The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
Groove Diameter
4.180 inches nominal
Details The length of a straight line which passes through the center of the groove,and terminates at the circumference.
Overall Length
0.450 inches nominal
Details The dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.
Outside Diameter
4.290 inches nominal
Details The length of a straight line which passes through the center of a circular figure or body,and terminates at the outside circumference.
Thread Size
4 11/64-28
Details Designates the thread diameter and number of threads per specific measurement scale.
Aperture Diameter
3.917 inches nominal
Details The length of a straight line which passes through the center of an aperture,and terminates at the circumference.
Inner Groove Width
0.0500 inches nominal
Details A measurement taken at right angles to the length of the inner groove,in distinction from thickness.
End Item Identification
lantirn target project
Details The national stock number or the identification information of the end equipment for which the item is a part.
Screw Thread Series Designator
uns
Details A designation distinguishing one group of screw thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
Thread Location
internal
Details Indicates the location of the thread on the item.
Internal Flange Thickness
0.063 inches nominal
Details A measurement of the smallest dimension of an internal flange,in distinction from length or width.
Groove Location
adjacent to internal flange
Details Indicates the location of the groove on the item.
Master-Cross Reference List
Part CAGE DAC HCC RNCC RNVC MSDS RNAAC
717511336-009 04939 5 - 3 2 - TU
717511336-009 61999 5 - 5 2 - TX
Material and Special Handling
Hazardous material, precious metals, criticality, and electrostatic discharge indicators.
HMIC PMIC ESD/EMI Criticality
N A - -
Freight
Universal / National Freight and Handling Information
UFC HMC LTL LCL
33110 - D -
RVC WCC TCC SHC
- 744 Z 9
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FAQs
Frequently asked questions for NSN 1240-01-291-7137
What is the NIIN of the NSN 1240-01-291-7137?
The National Item Identification Number (NIIN) of the NSN 1240-01-291-7137 is 01-291-7137
When the NSN 1240-01-291-7137 was assigned to the Federal Catalog?
It was assigned 36 years ago, on Wed, Jan 4, 1989
Does the NSN 1240-01-291-7137 contain any precious metals?
Does not contain precious metal
Does the NSN 1240-01-291-7137 contain any hazardous material?
No data in HMIRS

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