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Technical Data Sheet
550992 ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The LIMITER,TEMPERATURE,DEFOG DUCT is a the manufacturer industrial component. Key specifications include end_item_identification: 1660000339178, general_characteristics_item_description: ALUMINUM;4.250 IN. LG IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-246-6077, 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
550992
NSN: 5330-00-246-6077
FSC: 5330
CAGE: 82722 — WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP DBA WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP (USA)
SPECIFICATIONS
end_item_identification1660000339178
general_characteristics_item_descriptionALUMINUM;4.250 IN. LG IN
NSN5330-00-246-6077
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 550992 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
CENTER HOLE DIAMETER: 0.438 INCHES NOMINAL IN
COLOR: BLACK
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D2000 4AA815 ASSN STD ALL MATERIAL RESPONSES OVERALL
MATERIAL: RUBBER POLYISOPRENE NATURAL CLASS NR OR RUBBER BUTADIENE-STYRENE CLASS SBR OR RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR OR RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM OVERALL
CROSS-SECTIONAL SHAPE STYLE: D
CROSS-SECTIONAL HEIGHT: 0.203 INCHES NOMINAL IN
PERIPHERAL DIAMETER: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.438 INCHES NOMINAL IN
COLORBLACK
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D2000 4AA815 ASSN STD ALL MATERIAL RESPONSES OVERALL
MATERIALRUBBER POLYISOPRENE NATURAL CLASS NR OR RUBBER BUTADIENE-STYRENE CLASS SBR OR RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR OR RUBBER ETHYLENE-PROPYLENE-DIENE CLASS EPDM OVERALL
CROSS-SECTIONAL SHAPE STYLED
MATERIAL DOCUMENT AND CLASSIFICATIONUNABLE TO DECODE
CROSS-SECTIONAL HEIGHT0.203 INCHES NOMINAL IN
PERIPHERAL DIAMETER0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
513569Interchangeable
interchangeable cross-reference
interchangeable
550992Interchangeable
interchangeable cross-reference
interchangeable
10542Interchangeable
interchangeable cross-reference
interchangeable
DC10542Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 550992?
550992 is a LIMITER,TEMPERATURE,DEFOG DUCT.
What parts can replace 550992?
There are 4 known substitutes for 550992: 513569, 550992, 10542 and 1 more. Substitute compatibility should be verified for your specific system.
Is 550992 still available?
550992 is currently cancelled.
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