PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 77491
77491 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

HEATING ELEMENT,ELECTRICAL,NONIM. Key specifications include material: STEEL CORROSION RESISTING SHEATH, body_style: FINNED, TUBULAR, U SHAPED, heat_control_type: THERMOSTAT, end_item_identification: NAVY WEAPON SYSTEM CODE TH STRATEGIC SEALIFT CONVERSION SHIPS CLASS, element_radiation_spectrum: NONINFRARED, maximum_wattage_rating_in_watts: 2800.0 SINGLE VOLTAGE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-524-6585, 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
77491
NSN: 4720-00-524-6585
FSC: 4720
CAGE: 01317 — FYR-FYTER CO INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING SHEATH
body_styleFINNED, TUBULAR, U SHAPED
heat_control_typeTHERMOSTAT
end_item_identificationNAVY WEAPON SYSTEM CODE TH STRATEGIC SEALIFT CONVERSION SHIPS CLASS
element_radiation_spectrumNONINFRARED
maximum_wattage_rating_in_watts2800.0 SINGLE VOLTAGE
voltage_in_volts_and_current_type254.0 AC SINGLE VOLTAGE
NSN4720-00-524-6585
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 77491 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
SAE-AS7928Interchangeable
interchangeable cross-reference
interchangeable
MS21004-18Interchangeable
interchangeable cross-reference
interchangeable
MIL-T-7928Interchangeable
interchangeable cross-reference
interchangeable
77491Interchangeable
interchangeable cross-reference
interchangeable
77428Interchangeable
interchangeable cross-reference
interchangeable
L210T0:B12983-D-A SH3 IT2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 77491?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 77491?
77491 is a HEATING ELEMENT,ELECTRICAL,NONIM.
What parts can replace 77491?
There are 9 known substitutes for 77491: SAE-AS7928, MS21004-18, MIL-T-7928 and 6 more. Substitute compatibility should be verified for your specific system.
Is 77491 still available?
77491 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 77491

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026