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654780 — RING,RETAINING,OPTICAL ELEMENT

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

654780: RING,RETAINING,OPTICAL ELEMENT.

The RING,RETAINING,OPTICAL ELEMENT is a the manufacturer optical transceiver module designed for high-speed data center interconnects. Key specifications include material: COPPER ALLOY, groove_location: INSIDE FACE OF FLANGE, outside_diameter: 3.375 INCHES NOMINAL IN, aperture_diameter: 3.125 INCHES NOMINAL IN, surface_treatment: FNAAF0 AND ENAMEL, end_item_identification: GUN SIGHT MK15. This part is cataloged in the U.S.

Government catalog under NSN 1240-00-382-5897, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
654780
NSN: 1240-00-382-5897
FSC: 1240 — Optical Sighting and Ranging Equipment
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialCOPPER ALLOY
groove_locationINSIDE FACE OF FLANGE
outside_diameter3.375 INCHES NOMINAL IN
aperture_diameter3.125 INCHES NOMINAL IN
surface_treatmentFNAAF0 AND ENAMEL
end_item_identificationGUN SIGHT MK15
internal_flange_thickness0.062 INCHES NOMINAL IN
NSN1240-00-382-5897
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,RETAINING,OPTICAL ELEMENT TITLE COMPONENT PN 654780 MFR RING,RETAINING,OPTICAL
KEY FEATURES
•
GROOVE LOCATION: INSIDE FACE OF FLANGE
•
INTERNAL FLANGE THICKNESS: 0.062 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.375 INCHES NOMINAL IN
•
APERTURE DIAMETER: 3.125 INCHES NOMINAL IN
•
SURFACE TREATMENT: FNAAF0 AND ENAMEL
•
MATERIAL: COPPER ALLOY
TYPICAL APPLICATIONS
  • Data center switch-to-switch interconnects
  • Server-to-storage fabric connectivity
  • Long-distance fiber optic links
  • High-speed uplink connections (10G/25G/40G/100G)
TECHNICAL CHARACTERISTICS
GROOVE LOCATIONINSIDE FACE OF FLANGE
INTERNAL FLANGE THICKNESS0.062 INCHES NOMINAL IN
OUTSIDE DIAMETER3.375 INCHES NOMINAL IN
APERTURE DIAMETER3.125 INCHES NOMINAL IN
SURFACE TREATMENTFNAAF0 AND ENAMEL
END ITEM IDENTIFICATIONGUN SIGHT MK15
MATERIALCOPPER ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
481117-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
265451Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 654780?
654780 is a RING,RETAINING,OPTICAL ELEMENT.
What parts can replace 654780?
There are 2 known substitutes for 654780: 481117-4, 265451. Substitute compatibility should be verified for your specific system.
What is the NSN for 654780?
654780 is cataloged in the U.S. Government catalog under NSN 1240-00-382-5897. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.