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Technical Data Sheet
PartsTable / COMPONENT / 266675R91
266675R91 ✓ 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: STEEL CASE, case_style: SQUARE, seal_width: 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN, temp_rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF, housing_bore_diameter: 4.249 INCHES NOMINAL IN, sealing_element_style: ANGULAR. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-706-4794, 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
266675R91
NSN: 5330-00-706-4794
FSC: 5330
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
temp_rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
housing_bore_diameter4.249 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter3.125 INCHES NOMINAL IN
NSN5330-00-706-4794
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 266675R91 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: ANGULAR
•
ACCOMMODATED SHAFT DIAMETER: 3.125 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
•
SEAL WIDTH: 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
•
HOUSING BORE DIAMETER: 4.249 INCHES NOMINAL IN
•
TEMP RATING: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
•
CASE STYLE: SQUARE
TECHNICAL CHARACTERISTICS (FLIS)
SEALING ELEMENT STYLEANGULAR
ACCOMMODATED SHAFT DIAMETER3.125 INCHES NOMINAL IN
MATERIALSTEEL CASE
SEAL WIDTH0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN
HOUSING BORE DIAMETER4.249 INCHES NOMINAL IN
TEMP RATING-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
CASE STYLESQUARE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
49409Interchangeable
interchangeable cross-reference
interchangeable
31239Interchangeable
interchangeable cross-reference
interchangeable
22BNC-50-0-3Interchangeable
interchangeable cross-reference
interchangeable
276MR138P001Interchangeable
interchangeable cross-reference
interchangeable
3391-0001Interchangeable
interchangeable cross-reference
interchangeable
31329Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 266675R91?
266675R91 is a SEAL,PLAIN ENCASED.
What parts can replace 266675R91?
There are 14 known substitutes for 266675R91: 49409, 31239, 22BNC-50-0-3 and 11 more. Substitute compatibility should be verified for your specific system.
Is 266675R91 still available?
266675R91 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026