PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A121Mount,sight

Lightforce Usa, Incorporated Div Mil-Gov-Le · NSN 1240-01-612-4319 · FSC 1240 · No Item Name Available
Verified by PartsTable
NSN 1240-01-612-4319 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-612-4319. Primary manufacturer part number: A121.
Features
  • Mount,sight — FSC 1240
  • 1 verified cross-reference
  • Primary manufacturer: Lightforce Usa, Incorporated Div Mil-Gov-Le
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Mount,sight, cataloged under National Stock Number 1240-01-612-4319, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is Lightforce Usa, Incorporated Div Mil-Gov-Le. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameMount,sight
FSC / FSG1240 — No Item Name Available (FSG 12)
ManufacturersLightforce Usa, Incorporated Div Mil-Gov-Le (CAGE 1SLF0)
Technical Specifications
ParameterValue
NSN1240-01-612-4319
Primary Part NumberA121
Item NameMount,sight
FSC / FSG1240 / 12 — No Item Name Available
ManufacturerLightforce Usa, Incorporated Div Mil-Gov-Le
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5660-00-224-8663A121-12-4-5-14R INTERCHANGEABLE
Barbed Wire
American Society for Testing and Materials Dba Astm International
5945-00-259-0505 INTERCHANGEABLE
Solenoid,electrical
5306-00-483-7244A121 INTERCHANGEABLE
Bolt,shoulder
Hartzell Propeller Llc
5950-00-494-4934278-2129-030 INTERCHANGEABLE
Coil,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
4730-00-542-4266SAE J513 4 010109B INTERCHANGEABLE
Plug,tube Fitting,threaded
Sae International Dba Sae International
5660-00-596-2384 INTERCHANGEABLE
Barbed Wire
3455-01-042-4841 INTERCHANGEABLE
File,rotary
4210-01-129-5230101325 INTERCHANGEABLE
Swivel,right and Left Hand
Akron Brass Company
4320-01-209-2918A121 INTERCHANGEABLE
Impeller,pump,centrifugal
Circor Naval Solutions Llc Dba Warren Pumps
5355-01-434-2819A/121 INTERCHANGEABLE
Knob
O. E. M. Controls, Inc. Dba Oem Controls Inc
Cross-Reference Index
Part NumberManufacturer
A121 PRIMARY Lightforce Usa, Incorporated Div Mil-Gov-Le (USA)
Related Parts
5660-00-224-8663INTERCHANGEABLE
BARBED WIRE
A121-12-4-5-14R
5945-00-259-0505INTERCHANGEABLE
SOLENOID,ELECTRICAL
5306-00-483-7244INTERCHANGEABLE
BOLT,SHOULDER
A121
5950-00-494-4934INTERCHANGEABLE
COIL,RADIO FREQUENCY
278-2129-030
4730-00-542-4266INTERCHANGEABLE
PLUG,TUBE FITTING,THREADED
SAE J513 4 010109B
5660-00-596-2384INTERCHANGEABLE
BARBED WIRE
3455-01-042-4841INTERCHANGEABLE
FILE,ROTARY
4210-01-129-5230INTERCHANGEABLE
SWIVEL,RIGHT AND LEFT HAND
101325
4320-01-209-2918INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A121
5355-01-434-2819INTERCHANGEABLE
KNOB
A/121

Frequently Asked Questions

What is NSN 1240-01-612-4319?

NSN 1240-01-612-4319 is a Mount,sight, manufactured by Lightforce Usa, Incorporated Div Mil-Gov-Le, classified under FSC 1240 (No Item Name Available). Status: active.

What are the part numbers for NSN 1240-01-612-4319?

NSN 1240-01-612-4319 has 1 cross-referenced part number: A121 (Lightforce Usa, Incorporated Div Mil-Gov-Le).

What NSN replaces 1240-01-612-4319?

There are 10 known substitutes for 1240-01-612-4319: 5660-00-224-8663, 5945-00-259-0505, 5306-00-483-7244 and 7 more. Verify interchangeability with system specifications before substitution.

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