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551637 — HEATING ELEMENT,ELECTRICAL,IMMER

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

551637: HEATING ELEMENT,ELECTRICAL,IMMER.

HEATING ELEMENT,ELECTRICAL,IMMER. Key specifications include length: 6.438 INCHES NOMINAL IN, body_style: TUBULAR, THREADED, overall_length: 7.938 INCHES NOMINAL IN, terminal_length: 37.500 INCHES NOMINAL IN, outside_diameter: 0.375 INCHES NOMINAL IN, mounting_method_style: SCREW PLUG OR BUSHING TYPE MOUNTING FACILITY. This part is cataloged in the U.S.

Government catalog under NSN 4520-00-970-1759, 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
551637
NSN: 4520-00-970-1759
FSC: 4520 — Space and Water Heating Equipment
CAGE: 11247 — LODESTONE CORP DIV OF FEDDERS CORP (USA)
SPECIFICATIONS
length6.438 INCHES NOMINAL IN
body_styleTUBULAR, THREADED
overall_length7.938 INCHES NOMINAL IN
terminal_length37.500 INCHES NOMINAL IN
outside_diameter0.375 INCHES NOMINAL IN
terminal_quantity2
mounting_method_styleSCREW PLUG OR BUSHING TYPE MOUNTING FACILITY
element_connection_styleWIRE LEAD
mounting_facility_length0.625 INCHES NOMINAL IN
element_radiation_spectrumNONINFRARED
maximum_wattage_rating_in_watts275.0 SINGLE VOLTAGE
voltage_in_volts_and_current_type115.0 AC SINGLE VOLTAGE
NSN4520-00-970-1759
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HEATING ELEMENT,ELECTRICAL,IMMER TITLE COMPONENT PN 551637 MFR HEATING ELEMENT,ELECTR
KEY FEATURES
•
TERMINAL QUANTITY: 2
•
LENGTH: 6.438 INCHES NOMINAL IN
•
VOLTAGE IN VOLTS AND CURRENT TYPE: 115.0 AC SINGLE VOLTAGE
•
BODY STYLE: TUBULAR, THREADED
•
MAXIMUM WATTAGE RATING IN WATTS: 275.0 SINGLE VOLTAGE
•
TERMINAL LENGTH: 37.500 INCHES NOMINAL IN
•
MOUNTING FACILITY LENGTH: 0.625 INCHES NOMINAL IN
•
ELEMENT CONNECTION STYLE: WIRE LEAD
TECHNICAL CHARACTERISTICS
TERMINAL QUANTITY2
LENGTH6.438 INCHES NOMINAL IN
VOLTAGE IN VOLTS AND CURRENT TYPE115.0 AC SINGLE VOLTAGE
BODY STYLETUBULAR, THREADED
MAXIMUM WATTAGE RATING IN WATTS275.0 SINGLE VOLTAGE
TERMINAL LENGTH37.500 INCHES NOMINAL IN
MOUNTING FACILITY LENGTH0.625 INCHES NOMINAL IN
ELEMENT CONNECTION STYLEWIRE LEAD
OVERALL LENGTH7.938 INCHES NOMINAL IN
OUTSIDE DIAMETER0.375 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4520 — Space and Water Heating Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4520-00-000-0098 4520-00-000-0099 4520-00-001-1240 4520-00-001-3518 4520-00-001-3519 4520-00-001-6052 4520-00-001-6298 4520-00-001-7726
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 551637?
551637 is a HEATING ELEMENT,ELECTRICAL,IMMER.
What is the NSN for 551637?
551637 is cataloged in the U.S. Government catalog under NSN 4520-00-970-1759. 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.