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Technical Data Sheet
PartsTable / COMPONENT / 287-1020PT18
287-1020PT18 ✓ 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 is a the manufacturer industrial component. Key specifications include material: STEEL SPRING, seal_width: 0.312 INCHES NOMINAL IN, temp_rating: -40.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF, construction: SPLIT, housing_bore_diameter: 3.375 INCHES NOMINAL IN, accommodated_shaft_diameter: 2.750 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 5330-00-331-4439, 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
287-1020PT18
NSN: 5330-00-331-4439
FSC: 5330
CAGE: 54X10 — RAYTHEON COMPANY (USA)
SPECIFICATIONS
materialSTEEL SPRING
seal_width0.312 INCHES NOMINAL IN
temp_rating-40.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF
constructionSPLIT
housing_bore_diameter3.375 INCHES NOMINAL IN
accommodated_shaft_diameter2.750 INCHES NOMINAL IN
cross-sectional_shape_styleSINGLE LIP
NSN5330-00-331-4439
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 287-1020PT18 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
•
HOUSING BORE DIAMETER: 3.375 INCHES NOMINAL IN
•
CONSTRUCTION: SPLIT
•
MATERIAL: RUBBER SYNTHETIC SEALING ELEMENT
•
ACCOMMODATED SHAFT DIAMETER: 2.750 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SINGLE LIP
•
SEAL WIDTH: 0.312 INCHES NOMINAL IN
•
TEMP RATING: -40.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF
TECHNICAL CHARACTERISTICS (FLIS)
HOUSING BORE DIAMETER3.375 INCHES NOMINAL IN
CONSTRUCTIONSPLIT
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
MATERIALSTEEL SPRING
ACCOMMODATED SHAFT DIAMETER2.750 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESINGLE LIP
SEAL WIDTH0.312 INCHES NOMINAL IN
TEMP RATING-40.0 FAHRENHEIT AND 300.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
84465Interchangeable
interchangeable cross-reference
interchangeable
50534Interchangeable
interchangeable cross-reference
interchangeable
7X9-65Interchangeable
interchangeable cross-reference
interchangeable
1490-0004Interchangeable
interchangeable cross-reference
interchangeable
1001Interchangeable
interchangeable cross-reference
interchangeable
774417-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 287-1020PT18?
287-1020PT18 is a SEAL,PLAIN.
What parts can replace 287-1020PT18?
There are 15 known substitutes for 287-1020PT18: 84465, 50534, 7X9-65 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 287-1020PT18?
287-1020PT18 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-331-4439. 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