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Technical Data Sheet
PartsTable / COMPONENT / 81T3591
81T3591 ✓ 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: RUBBER SYNTHETIC SEALING ELEMENT, seal_width: 0.312 INCHES NOMINAL IN, construction: SOLID, housing_bore_diameter: 1.688 INCHES MINIMUM AND 1.690 INCHES MAXIMUM IN, accommodated_shaft_diameter: 1.250 INCHES NOMINAL IN, cross-sectional_shape_style: SINGLE LIP. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-505-6066, 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
81T3591
NSN: 5330-00-505-6066
FSC: 5330
CAGE: 23040 — FORD MOTOR CO FORD PARTS AND SERVICE DIV GOVERNMENT PART SALES (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEALING ELEMENT
seal_width0.312 INCHES NOMINAL IN
constructionSOLID
housing_bore_diameter1.688 INCHES MINIMUM AND 1.690 INCHES MAXIMUM IN
accommodated_shaft_diameter1.250 INCHES NOMINAL IN
cross-sectional_shape_styleSINGLE LIP
NSN5330-00-505-6066
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 81T3591 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
•
CONSTRUCTION: SOLID
•
CROSS-SECTIONAL SHAPE STYLE: SINGLE LIP
•
ACCOMMODATED SHAFT DIAMETER: 1.250 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 1.688 INCHES MINIMUM AND 1.690 INCHES MAXIMUM IN
•
SEAL WIDTH: 0.312 INCHES NOMINAL IN
•
MATERIAL: STEEL INTERNALLY MOLDED-IN REINFORCEMENT
TECHNICAL CHARACTERISTICS (FLIS)
CONSTRUCTIONSOLID
CROSS-SECTIONAL SHAPE STYLESINGLE LIP
ACCOMMODATED SHAFT DIAMETER1.250 INCHES NOMINAL IN
HOUSING BORE DIAMETER1.688 INCHES MINIMUM AND 1.690 INCHES MAXIMUM IN
SEAL WIDTH0.312 INCHES NOMINAL IN
MATERIALSTEEL INTERNALLY MOLDED-IN REINFORCEMENT
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
10367919Interchangeable
interchangeable cross-reference
interchangeable
233023Interchangeable
interchangeable cross-reference
interchangeable
LU. FORM. 8249Interchangeable
interchangeable cross-reference
interchangeable
94-32271Interchangeable
interchangeable cross-reference
interchangeable
ACM5Interchangeable
interchangeable cross-reference
interchangeable
1401-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 81T3591?
81T3591 is a SEAL,PLAIN.
What parts can replace 81T3591?
There are 31 known substitutes for 81T3591: 10367919, 233023, LU. FORM. 8249 and 28 more. Substitute compatibility should be verified for your specific system.
Is 81T3591 still available?
81T3591 is currently cancelled.
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Last verified: July 2026