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27NEMS — Technical Data Sheet

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NAVAL OBSERVATORY · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The PRISM,OPTICAL INSTRUMENT is a NAVAL OBSERVATORY optical transceiver module designed for high-speed data center interconnects. Key specifications include MATERIAL: GLASS, STYLE DESIGNATOR: PENTA. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 6650-00-146-5434, 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
27NEMS
NSN: 6650-00-146-5434
FSC: 6650
CAGE: 88133 — NAVAL OBSERVATORY (USA)
SPECIFICATIONS
MATERIALGLASS
STYLE DESIGNATORPENTA
NSN6650-00-146-5434
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: NAVAL OBSERVATORY PRISM,OPTICAL INSTRUMENT TITLE COMPONENT PN 27NEMS MFR NAVAL OBSERVATORY PRISM,OPTICAL INSTRUME
KEY FEATURES
•
MATERIAL: GLASS
•
STYLE DESIGNATOR: PENTA
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
MATERIALGLASS
STYLE DESIGNATORPENTA
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
11507852InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5M1696-001InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5240InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A-A-59282InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2186InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
O-C-265InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 27NEMS?
27NEMS is a PRISM,OPTICAL INSTRUMENT manufactured by NAVAL OBSERVATORY.
What parts can replace 27NEMS?
There are 21 known substitutes for 27NEMS: 11507852, 5M1696-001, 5240 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 27NEMS?
27NEMS is cataloged in the Federal Logistics Information System under NSN 6650-00-146-5434. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026