PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

23101Ring,retaining,optical Element

Charles Reed Knight Jr Dba Knight's Armament Company · NSN 1240-01-577-6401 · FSC 1240 · No Item Name Available
Verified by PartsTable
NSN 1240-01-577-6401 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-577-6401. Primary manufacturer part number: 23101.
Features
  • Ring,retaining,optical Element — FSC 1240
  • 1 verified cross-reference
  • Primary manufacturer: Charles Reed Knight Jr Dba Knight's Armament Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ring,retaining,optical Element, cataloged under National Stock Number 1240-01-577-6401, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is Charles Reed Knight Jr Dba Knight's Armament Company. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1240-01-577-6401
Primary Part Number23101
Item NameRing,retaining,optical Element
FSC / FSG1240 / 12 — No Item Name Available
ManufacturerCharles Reed Knight Jr Dba Knight's Armament Company
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
9540-00-148-4327 INTERCHANGEABLE
Angle,structural
5915-00-153-441621365727G1 INTERCHANGEABLE
Network,phase Changing
L3harris Technologies, Inc.
5355-00-274-785523101 INTERCHANGEABLE
Knob
Emcore Corporation Div Concord Division
3433-00-373-17280331-0015 INTERCHANGEABLE
Tip,cutting Torch
Victor Equipment Co
5935-00-615-14512310-1 INTERCHANGEABLE
Connector,plug,electrical
Microwave Devices Inc
3110-01-188-768223101 INTERCHANGEABLE
Bearing,roller,needle
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5330-01-234-7702 INTERCHANGEABLE
Gasket and Preformed Packing Set
4030-01-268-987023101 INTERCHANGEABLE
Shackle
Mjt Holdings Llc
4810-01-289-3488 INTERCHANGEABLE
Valve,solenoid
5998-01-541-707323101 INTERCHANGEABLE
Circuit Card Assembly
Altron, Inc
Cross-Reference Index
Part NumberManufacturer
23101 PRIMARY Charles Reed Knight Jr Dba Knight's Armament Company (USA)
Related Parts
9540-00-148-4327INTERCHANGEABLE
ANGLE,STRUCTURAL
5915-00-153-4416INTERCHANGEABLE
NETWORK,PHASE CHANGING
21365727G1
5355-00-274-7855INTERCHANGEABLE
KNOB
23101
3433-00-373-1728INTERCHANGEABLE
TIP,CUTTING TORCH
0331-0015
5935-00-615-1451INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
2310-1
3110-01-188-7682INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
23101
5330-01-234-7702INTERCHANGEABLE
GASKET AND PREFORMED PACKING SET
4030-01-268-9870INTERCHANGEABLE
SHACKLE
23101
4810-01-289-3488INTERCHANGEABLE
VALVE,SOLENOID
5998-01-541-7073INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
23101
5340-01-721-5500INTERCHANGEABLE
RETAINER,HELICAL COMPRESSION SPR
23101-1103-1
5307-01-721-5585INTERCHANGEABLE
STUD,SHOULDERED
23101-1102-1

Frequently Asked Questions

What is NSN 1240-01-577-6401?

NSN 1240-01-577-6401 is a Ring,retaining,optical Element, manufactured by Charles Reed Knight Jr Dba Knight's Armament Company, classified under FSC 1240 (No Item Name Available). Status: active.

What are the part numbers for NSN 1240-01-577-6401?

NSN 1240-01-577-6401 has 1 cross-referenced part number: 23101 (Charles Reed Knight Jr Dba Knight's Armament Company).

What NSN replaces 1240-01-577-6401?

There are 12 known substitutes for 1240-01-577-6401: 9540-00-148-4327, 5915-00-153-4416, 5355-00-274-7855 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 23101?

Key specifications for 23101: Part Name Assigned by Controlling Agency: 34MM MOUNTING RING SET MM. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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