PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ATACR 5-25X56 F1Sight,bore,optical

Lightforce Usa, Incorporated Div Mil-Gov-Le · NSN 1240-01-685-9648 · FSC 1240 · No Item Name Available
Verified by PartsTable
NSN 1240-01-685-9648 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-685-9648. Primary manufacturer part number: ATACR 5-25X56 F1.
Features
  • Sight,bore,optical — FSC 1240
  • 2 verified cross-references
  • 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 Sight,bore,optical, cataloged under National Stock Number 1240-01-685-9648, 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 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSight,bore,optical
FSC / FSG1240 — No Item Name Available (FSG 12)
ManufacturersLightforce Usa, Incorporated Div Mil-Gov-Le (CAGE 1SLF0)
Technical Specifications
ParameterValue
NSN1240-01-685-9648
Primary Part NumberATACR 5-25X56 F1
Item NameSight,bore,optical
FSC / FSG1240 / 12 — No Item Name Available
ManufacturerLightforce Usa, Incorporated Div Mil-Gov-Le
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
3040-00-389-4934B1863PCM546 INTERCHANGEABLE
Shoe,sliding Clutch
Middleby Marshall Inc Conveyor Ovens and Mixers Div
5985-00-620-5978ANCN476U INTERCHANGEABLE
Attenuator,variable
Joint Electronics Type Designation System
5305-00-913-7334SS1032AA14 INTERCHANGEABLE
Screw,machine
Apm Hexseal Corp
4730-01-193-7390SAE J512 4 060115B INTERCHANGEABLE
Sleeve,compression,tube-Hose Fit
Sae International Dba Sae International
6695-01-671-3800820-00709 INTERCHANGEABLE
Case,electrical-Electronic Test
908 Devices Inc
Cross-Reference Index
Part NumberManufacturer
ATACR 5-25X56 F1 PRIMARY Lightforce Usa, Incorporated Div Mil-Gov-Le (USA)
M546 Lightforce Usa, Incorporated Div Mil-Gov-Le (USA)
Related Parts
3040-00-389-4934INTERCHANGEABLE
SHOE,SLIDING CLUTCH
B1863PCM546
5985-00-620-5978INTERCHANGEABLE
ATTENUATOR,VARIABLE
ANCN476U
5305-00-913-7334INTERCHANGEABLE
SCREW,MACHINE
SS1032AA14
4730-01-193-7390INTERCHANGEABLE
SLEEVE,COMPRESSION,TUBE-HOSE FIT
SAE J512 4 060115B
6695-01-671-3800INTERCHANGEABLE
CASE,ELECTRICAL-ELECTRONIC TEST
820-00709

Frequently Asked Questions

What is NSN 1240-01-685-9648?

NSN 1240-01-685-9648 is a Sight,bore,optical, 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 1240-01-685-9648?

NSN 1240-01-685-9648 has 2 cross-referenced part numbers: ATACR 5-25X56 F1 (Lightforce Usa, Incorporated Div Mil-Gov-Le), M546 (Lightforce Usa, Incorporated Div Mil-Gov-Le).

What NSN replaces 1240-01-685-9648?

There are 5 known substitutes for 1240-01-685-9648: 3040-00-389-4934, 5985-00-620-5978, 5305-00-913-7334 and 2 more. Verify interchangeability with system specifications before substitution.

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