NSN 1240-01-497-4402 · NIIN 014974402 · Part number 5612977
Naval Sea Systems Command · FSC 1240 — Optical Sighting and Ranging Equipment · FSG 12 — Fire Control Equipment · CAGE 53711
Government record, cited
NSN 1240-01-497-4402 — this item is cataloged by the U.S. Government under National Stock Number 1240-01-497-4402. Manufacturer of record part number: 5612977.
Also searched as1240-01-497-4402 ·
1240014974402 ·
NIIN 014974402 ·
01-497-4402 ·
FSC 1240 Optical Sighting and Ranging Equipment · CAGE 53711 · 5612977
Material: GLASS OPTICAL AND MAGNESIUM FLUORIDE LOCATION NOT OTHERWISE SPECIFIED
Thickness: 14.9 MILLIMETERS MINIMUM AND 15.1 MILLIMETERS MAXIMUM MM
1 manufacturer part number on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 1240-01-497-4402
NIIN: 014974402
FSC: 1240 — Optical Sighting and Ranging Equipment
FSG: 12 — Fire Control Equipment
Primary part number: 5612977
Manufacturer: Naval Sea Systems Command
General Description
The Window,optical Instrument, cataloged under National Stock Number 1240-01-497-4402, is classified within Federal Supply Class 1240 (Optical Sighting and Ranging Equipment) of the Fire Control Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1240-01-497-4402
Primary Part Number
5612977
Item Name
Window,optical Instrument
FSC / FSG
1240 / 12 — Optical Sighting and Ranging Equipment
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Diameter
34.0 MILLIMETERS NOMINAL MM
Polished Periphery
NOT PROVIDED
Material
GLASS OPTICAL AND MAGNESIUM FLUORIDE LOCATION NOT OTHERWISE SPECIFIED
Thickness
14.9 MILLIMETERS MINIMUM AND 15.1 MILLIMETERS MAXIMUM MM
Other items in FSC 1240 — Optical Sighting and Ranging Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1240-00-000-0160
SIGHT UNIT
1240-00-001-4014
1240-00-001-4014 · Item name not on file
1240-00-001-4015
1240-00-001-4015 · Item name not on file
1240-00-001-4488
FILTER,LIGHT,OPTICAL INSTRUMENT
1240-00-003-1076
1240-00-003-1076 · Item name not on file
1240-00-003-8404
1240-00-003-8404 · Item name not on file
1240-00-003-8405
1240-00-003-8405 · Item name not on file
1240-00-003-8406
MOUNT,TELESCOPE
Frequently Asked Questions
What is NSN 1240-01-497-4402?
NSN 1240-01-497-4402 is a Window,optical Instrument, manufactured by Naval Sea Systems Command, classified under FSC 1240, Optical Sighting and Ranging Equipment. Status: active.
What part numbers are listed for NSN 1240-01-497-4402?
NSN 1240-01-497-4402 has 1 manufacturer part number on file: 5612977 (Naval Sea Systems Command).
What are the specifications of 5612977?
Key specifications for 5612977: Diameter: 34.0 MILLIMETERS NOMINAL MM; Polished Periphery: NOT PROVIDED; Special Features: TWO LENS PIECES BONDED TOGETHER. CONVEX RADII ARE 30.5 MM AND 38.0 MM MAX. MM; Part Name Assigned by Controlling Agency: EYEPIECE, EL-3, DOUBLET. 4 specifications are documented in the U.S. Government catalog.
Is NSN 1240-01-497-4402 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
What is the DEMIL code for NSN 1240-01-497-4402?
NSN 1240-01-497-4402 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.