Product Details | OPTICAL ELEMENT RETAINING RING

1240-01-171-8377 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.20312400038Optical Sighting and Ranging Equipment58550055Night Vision Equipment, Emitted and Reflected Radiation66500063Optical Instruments, Test Equipment, Components and Accessories

Part Alternates: 13075287, 1240-01-171-8377, 01-171-8377, 1240011718377, 011718377

Fire Control Equipment | Optical Sighting and Ranging Equipment

Supply Group (FSG) NSN Assign. NIIN
12 15 FEB 1984 01-171-8377

Cross Reference | NSN 1240-01-171-8377

Part Number Cage Code Manufacturer
13075287 04939 LOCKHEED MARTIN CORPORATION DBA LOCKHEED MARTIN
13075287 58260 PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH

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Technical Data | NSN 1240-01-171-8377

Characteristic Specifications
MATERIAL ALUMINUM ALLOY
SURFACE TREATMENT ANODIZED, MIL-A-8625
THREAD LOCATION INTERNAL
THREAD SIZE 4 3/4-32
SCREW THREAD SERIES DESIGNATOR UNS
THREAD CLASS 2B
THREAD PITCH DIAMETERS 4.7297 TO 4.7358 INCHES
THREAD LENGTH 0.680 INCHES
THREAD DIRECTION RIGHT-HAND
OVERALL LENGTH 1.250 INCHES NOMINAL
OUTSIDE DIAMETER 5.020 INCHES NOMINAL
INTERNAL FLANGE THICKNESS 0.543 INCHES NOMINAL
INNER GROOVE WIDTH 0.050 INCHES NOMINAL
GROOVE DIAMETER 4.820 INCHES NOMINAL
GROOVE LOCATION INSIDE END OF THREAD

Restrictions/Controls & Freight Information | NSN 1240-01-171-8377

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:NThe item does not have a critical feature such as tolerance, fit restrictions or application. Nuclear hardness properties have not been determined (not valid for input).
Automatic Data Processing Equipment:0Represents items with no ADP components. NOTE: Codes 1 through 6 are only to be used when the item is Automatic Data Processing Equipment (ADPE) in its entirety and is limited to the type meeting only one of the definitions for codes 1 through 6. (See code 9)
Category Code Description
NMF Description 095190 HARDWARE, NOI SUB 9
Less than car load rating Q 70
Less than truck load rating Q 70.0
Water commodity Code 713 unknown
Originating Activity Code BD U.S. Army Aviation and Missile Command
Redstone Arsenal, AL 35898-5230
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable

Management | NSN 1240-01-171-8377

Category Code Description
Materiel Category and Inventory ManagerH Aircraft, Air Materiel
Appropriation and Budget Activity2 Stock Fund Secondary Items
Management Inventory Segment2 NONREPARABLE ITEMS (Exclusive of Insurance and Provisioning Items). This code will be used to identify items which are not reparable.
Specific Group/Generic CodeC Other Aircraft Categories
Weapons Systems/End Item or Homogeneous GroupCDTarget Acquisition Designation Sight (TADS) and Pilot Night Vision Sensor
Accounting Requirements CodeX Expendable item. An item of Army property coded with an ARC of ?X? in the AMDF. Expendable items require no formal accountability after issue from a stock record account. Commercial and fabricated items similar to items coded ?X? in the AMDF are considered expendable items.
Source of SupplyB17US Army Aviation and Missile Command (Air)
ATTN: AMSMI-LC-MM-C
Redstone Arsenal, AL 35898-5230
AgencyDADepartment of the Army
Service OrganizationAU.S. Army
ReparabilityZThis is a nonreparable item. If condemned or economically unserviceable, then dispose at the level authorized replace the item.
Acquisition Advice CodesVTERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each