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MB800261 ✓ 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: 0.313 INCHES NOMINAL IN, outside_diameter: 2.506 INCHES NOMINAL IN, surface_treatment: PLASTIC CASE, housing_bore_diameter: 2.502 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-484-1650, 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
MB800261
NSN: 5330-00-484-1650
FSC: 5330
CAGE: 09990 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV HYDRAULIC VALVE DIVISION (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.313 INCHES NOMINAL IN
outside_diameter2.506 INCHES NOMINAL IN
surface_treatmentPLASTIC CASE
housing_bore_diameter2.502 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter1.750 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed3600 FEET PER MINUTE FT
NSN5330-00-484-1650
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MB800261 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
•
OUTSIDE DIAMETER: 2.506 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC SEALING ELEMENT
•
ACCOMMODATED SHAFT DIAMETER: 1.750 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 3600 FEET PER MINUTE FT
•
SURFACE TREATMENT: PLASTIC CASE
•
HOUSING BORE DIAMETER: 2.502 INCHES NOMINAL IN
•
SEAL WIDTH: 0.313 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER2.506 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
ACCOMMODATED SHAFT DIAMETER1.750 INCHES NOMINAL IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED3600 FEET PER MINUTE FT
SURFACE TREATMENTPLASTIC CASE
HOUSING BORE DIAMETER2.502 INCHES NOMINAL IN
MATERIALSTEEL CASE
SEAL WIDTH0.313 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
CASE STYLESQUARE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
173-86Interchangeable
interchangeable cross-reference
interchangeable
D3SZ-2128-AInterchangeable
interchangeable cross-reference
interchangeable
C9AZ2128AInterchangeable
interchangeable cross-reference
interchangeable
80026-1Interchangeable
interchangeable cross-reference
interchangeable
96P15393S4Interchangeable
interchangeable cross-reference
interchangeable
SCD80026-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MB800261?
MB800261 is a SEAL,PLAIN ENCASED.
What parts can replace MB800261?
There are 19 known substitutes for MB800261: 173-86, D3SZ-2128-A, C9AZ2128A and 16 more. Substitute compatibility should be verified for your specific system.
Is MB800261 still available?
MB800261 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