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Technical Data Sheet
PartsTable / COMPONENT / 04399A
04399A ✓ 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 SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEALING ELEMENT, case_style: SQUARE, seal_width: 0.250 INCHES NOMINAL IN, temp_rating: -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF, housing_bore_diameter: 1.256 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN, sealing_element_style: VERTICAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-498-4890, 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
04399A
NSN: 5330-00-498-4890
FSC: 5330
CAGE: 31568 — TEXTRON INC JACOBSEN DIV (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEALING ELEMENT
case_styleSQUARE
seal_width0.250 INCHES NOMINAL IN
temp_rating-65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
housing_bore_diameter1.256 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
sealing_element_styleVERTICAL
accommodated_shaft_diameter0.668 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed1000 FEET PER MINUTE FT
NSN5330-00-498-4890
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 04399A 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
•
MATERIAL: RUBBER SYNTHETIC SEALING ELEMENT
•
SEAL WIDTH: 0.250 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT DIAMETER: 0.668 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: VERTICAL
•
HOUSING BORE DIAMETER: 1.256 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 1000 FEET PER MINUTE FT
•
CASE STYLE: SQUARE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
SEAL WIDTH0.250 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER0.668 INCHES NOMINAL IN
MATERIALSTEEL CASE
SEALING ELEMENT STYLEVERTICAL
HOUSING BORE DIAMETER1.256 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED1000 FEET PER MINUTE FT
CASE STYLESQUARE
TEMP RATING-65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
50469Interchangeable
interchangeable cross-reference
interchangeable
37-1059-4Interchangeable
interchangeable cross-reference
interchangeable
504P69Interchangeable
interchangeable cross-reference
interchangeable
10596-LCInterchangeable
interchangeable cross-reference
interchangeable
X8016060Interchangeable
interchangeable cross-reference
interchangeable
799262Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 04399A?
04399A is a SEAL,PLAIN ENCASED.
What parts can replace 04399A?
There are 11 known substitutes for 04399A: 50469, 37-1059-4, 504P69 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 04399A?
04399A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-498-4890. 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