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57B21 — Technical Data Sheet

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HORIZON AEROSPACE LLC DBA MAGNETICS DIVISION · 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

TRANSMITTER,TEMPERATURE,ELECTRIC. Key specifications include UNIT TYPE: PROTECTIVE TUBE, OVERALL LENGTH: 15.000 INCHES NOMINAL IN, OUTSIDE DIAMETER: 0.258 INCHES NOMINAL IN, STYLE DESIGNATOR: TRANSMITTER, 24V DC V, OPERATING TEMP RANGE: -50.0 TO 300.0 CELSIUS DEGC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 6685-00-618-5818, 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
57B21
NSN: 6685-00-618-5818
FSC: 6685
CAGE: 35918 — HORIZON AEROSPACE LLC DBA MAGNETICS DIVISION (USA)
SPECIFICATIONS
UNIT TYPEPROTECTIVE TUBE
OVERALL LENGTH15.000 INCHES NOMINAL IN
OUTSIDE DIAMETER0.258 INCHES NOMINAL IN
STYLE DESIGNATORTRANSMITTER, 24V DC V
OPERATING TEMP RANGE-50.0 TO 300.0 CELSIUS DEGC
NSN6685-00-618-5818
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: HORIZON AEROSPACE LLC DBA MAGNETICS DIVISION TRANSMITTER,TEMPERATURE,ELECTRIC TITLE COMPONENT PN 57B21 MFR HORIZON AEROSPACE LLC DBA MAGNETICS DIVISION TRANSMITTER,TEMPERATUR
KEY FEATURES
•
STYLE DESIGNATOR: TRANSMITTER, 24V DC V
•
OPERATING TEMP RANGE: -50.0 TO 300.0 CELSIUS DEGC
•
UNIT TYPE: PROTECTIVE TUBE
•
OUTSIDE DIAMETER: 0.258 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL LENGTH15.000 INCHES NOMINAL IN
STYLE DESIGNATORTRANSMITTER, 24V DC V
OPERATING TEMP RANGE-50.0 TO 300.0 CELSIUS DEGC
UNIT TYPEPROTECTIVE TUBE
OUTSIDE DIAMETER0.258 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
0813601-6InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
0813601-4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
33124InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
22300001InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5195934InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
233N50-1InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 57B21?
57B21 is a TRANSMITTER,TEMPERATURE,ELECTRIC manufactured by HORIZON AEROSPACE LLC DBA MAGNETICS DIVISION.
What parts can replace 57B21?
There are 9 known substitutes for 57B21: 0813601-6, 0813601-4, 33124 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 57B21?
57B21 is cataloged in the Federal Logistics Information System under NSN 6685-00-618-5818. 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: October 2026