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502551 ✓ 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 TUBE ASSEMBLY,METAL is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: SQUARE, seal_width: 0.500 INCHES NOMINAL IN, housing_bore_diameter: 4.003 INCHES NOMINAL IN, sealing_element_style: VERTICAL, accommodated_shaft_diameter: 3.000 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-829-2050, 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
502551
NSN: 5330-00-829-2050
FSC: 5330
CAGE: 80201 — SKF USA INC. DBA SKF AEROSPACE SEALING SOLUTIONS (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.500 INCHES NOMINAL IN
housing_bore_diameter4.003 INCHES NOMINAL IN
sealing_element_styleVERTICAL
accommodated_shaft_diameter3.000 INCHES NOMINAL IN
NSN5330-00-829-2050
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 502551 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
•
SEALING ELEMENT STYLE: VERTICAL
•
SEAL WIDTH: 0.500 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 4.003 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 3.000 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC SEALING ELEMENT
TECHNICAL CHARACTERISTICS (FLIS)
SEALING ELEMENT STYLEVERTICAL
SEAL WIDTH0.500 INCHES NOMINAL IN
HOUSING BORE DIAMETER4.003 INCHES NOMINAL IN
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER3.000 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
MATERIALSTEEL CASE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
50255-1Interchangeable
interchangeable cross-reference
interchangeable
P50700-1Interchangeable
interchangeable cross-reference
interchangeable
P50700-1 ITEM 6Interchangeable
interchangeable cross-reference
interchangeable
400AW3T8Interchangeable
Same NIIN cross-reference
interchangeable
CR29952Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 502551?
502551 is a TUBE ASSEMBLY,METAL.
What parts can replace 502551?
There are 5 known substitutes for 502551: 50255-1, P50700-1, P50700-1 ITEM 6 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 502551?
502551 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-829-2050. 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