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Technical Data Sheet
PartsTable / MRO / BUS HTB421
BUS HTB421 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 FUSEHOLDER,BLOCK is a the manufacturer industrial component. Key specifications include end_item_identification: CONTROL UNIT, VENT; WSD: VIRGINIA CLASS SUBMARINE, SSN-774; LOGISTICS SUPPORT VESSEL, part_name_assigned_by_controlling_agency: INAVY-FUSEHOLDER FOR MODEL C-200 AND NC-200 SERIES. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5920-01-577-0619, 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
MRO→ MRO_GENERAL→ BUS HTB421
NSN: 5920-01-577-0619
FSC: 5920
CAGE: 09051 — ITW FOOD EQUIPMENT GROUP LLC DBA GAYLORD INDUSTRIES (USA)
SPECIFICATIONS
end_item_identificationCONTROL UNIT, VENT; WSD: VIRGINIA CLASS SUBMARINE, SSN-774; LOGISTICS SUPPORT VESSEL
part_name_assigned_by_controlling_agencyINAVY-FUSEHOLDER FOR MODEL C-200 AND NC-200 SERIES
NSN5920-01-577-0619
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FUSEHOLDER,BLOCK TITLE COMPONENT PN BUS HTB421 MFR FUSEHOLDER,BLOCK
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONCONTROL UNIT, VENT; WSD: VIRGINIA CLASS SUBMARINE, SSN-774; LOGISTICS SUPPORT VESSEL
PART NAME ASSIGNED BY CONTROLLING AGENCYINAVY-FUSEHOLDER FOR MODEL C-200 AND NC-200 SERIES
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
339/13039Interchangeable
interchangeable cross-reference
interchangeable
13039Interchangeable
interchangeable cross-reference
interchangeable
684-561-9001Interchangeable
interchangeable cross-reference
interchangeable
R-12-1-9Interchangeable
interchangeable cross-reference
interchangeable
N-46910 PIECE 79Interchangeable
interchangeable cross-reference
interchangeable
A3156830-001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BUS HTB421?
BUS HTB421 is a FUSEHOLDER,BLOCK. It is classified as a MRO (MRO_GENERAL).
What parts can replace BUS HTB421?
There are 6 known substitutes for BUS HTB421: 339/13039, 13039, 684-561-9001 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BUS HTB421?
BUS HTB421 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5920-01-577-0619. 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: July 2026