PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

54B2Bulb,electric Resis

Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas · NSN 6685-00-821-5091 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-821-5091 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-821-5091. Primary manufacturer part number: 54B2.
Features
  • Bulb,electric Resis — FSC 6685
  • 3 verified cross-references
  • Primary manufacturer: Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Bulb,electric Resis, cataloged under National Stock Number 6685-00-821-5091, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBulb,electric Resis
FSC / FSG6685 — No Item Name Available (FSG 66)
ManufacturersHorizon Aerospace Llc Dba Magnetics Division (CAGE 35918); Rosemount Aerospace Inc Dba Rosemount Aerospace Inc (CAGE 59885); Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas (CAGE 60678)
Technical Specifications
ParameterValue
NSN6685-00-821-5091
Primary Part Number54B2
Item NameBulb,electric Resis
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerRosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6685-00-531-2736 INTERCHANGEABLE
Transmitter,temperature,electric
Cross-Reference Index
Part NumberManufacturer
54B2B Horizon Aerospace Llc Dba Magnetics Division (USA)
54B2 Rosemount Aerospace Inc Dba Rosemount Aerospace Inc (USA)
54B2 PRIMARY Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas (USA)
Related Parts
6685-00-531-2736INTERCHANGEABLE
TRANSMITTER,TEMPERATURE,ELECTRIC

Frequently Asked Questions

What is NSN 6685-00-821-5091?

NSN 6685-00-821-5091 is a Bulb,electric Resis, manufactured by Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-821-5091?

NSN 6685-00-821-5091 has 3 cross-referenced part numbers: 54B2B (Horizon Aerospace Llc Dba Magnetics Division), 54B2 (Rosemount Aerospace Inc Dba Rosemount Aerospace Inc), 54B2 (Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas).

What NSN replaces 6685-00-821-5091?

There is 1 known substitute for 6685-00-821-5091: 6685-00-531-2736. Verify interchangeability with system specifications before substitution.

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