PartsTable TECHNICAL DATA SHEET
AUGUST 2026Technical Data Sheet

278689PC4Filter,light,telescopic Instrume

Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier · NSN 1240-00-025-0208 · FSC 1240 · No Item Name Available
Verified by PartsTable
NSN 1240-00-025-0208 — this item is cataloged by the U.S. Government under National Stock Number 1240-00-025-0208. Primary manufacturer part number: 278689PC4.
Features
  • Filter,light,telescopic Instrume — FSC 1240
  • Material: GLASS SURFACE
  • Density Variability: NOT VARIABLE
  • Overall Diameter: 36.0 MILLIMETERS NOMINAL MM
  • Overall Thickness: 6.2 MILLIMETERS NOMINAL MM
  • 2 verified cross-references
  • Primary manufacturer: Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
Applications
  • Fluid filtration and purification
  • Engine intake air cleaning
  • Hydraulic system protection
  • Area illumination
  • Indicator and warning display
General Description

The Filter,light,telescopic Instrume, cataloged under National Stock Number 1240-00-025-0208, is classified within Federal Supply Class 1240 (No Item Name Available) of the Fire Control Equipment group. The primary manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1240-00-025-0208
Primary Part Number278689PC4
Item NameFilter,light,telescopic Instrume
FSC / FSG1240 / 12 — No Item Name Available
ManufacturerNavair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
StatusACTIVE
MaterialGLASS SURFACE
Density VariabilityNOT VARIABLE
Overall Diameter36.0 MILLIMETERS NOMINAL MM
Overall Thickness6.2 MILLIMETERS NOMINAL MM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Cross-Reference Index
Part NumberManufacturer
278689PC4 Bausch and Lomb Inc Optical Systems Div Optical Center (USA)
278689PC4 PRIMARY Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
Related Parts in Fire Control Equipment
1240-00-000-0160
SIGHT UNIT
3234001-111
1240-00-001-4014
NO ITEM NAME AVAILABLE
1240-00-001-4015
NO ITEM NAME AVAILABLE
1240-00-001-4488
FILTER,LIGHT,OPTICAL INSTRUMENT
178AS168-2
1240-00-003-1076
NO ITEM NAME AVAILABLE
1240-00-003-8404
NO ITEM NAME AVAILABLE
1240-00-003-8405
NO ITEM NAME AVAILABLE
1240-00-003-8406
MOUNT,TELESCOPE
11730901

Frequently Asked Questions

What is NSN 1240-00-025-0208?

NSN 1240-00-025-0208 is a Filter,light,telescopic Instrume, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 1240 (No Item Name Available). Status: active.

What are the part numbers for NSN 1240-00-025-0208?

NSN 1240-00-025-0208 has 2 cross-referenced part numbers: 278689PC4 (Bausch and Lomb Inc Optical Systems Div Optical Center), 278689PC4 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What are the specifications of 278689PC4?

Key specifications for 278689PC4: Material: GLASS SURFACE; Special Features: COLOR YELLOW; End Item Identification: RANGEFINDER MK58; Density Variability: NOT VARIABLE. 6 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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