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PartsTable / COMPONENT / 88AX121
88AX121 ✓ 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: LEATHER OR RUBBER SYNTHETIC SEALING ELEMENT A, case_style: SQUARE, seal_width: 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN, housing_bore_diameter: 3.350 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 2.219 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-171-7835, 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
88AX121
NSN: 5330-00-171-7835
FSC: 5330
CAGE: 76040 — MACK TRUCKS INC PARTS OPN (USA)
SPECIFICATIONS
materialLEATHER OR RUBBER SYNTHETIC SEALING ELEMENT A
case_styleSQUARE
seal_width0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
housing_bore_diameter3.350 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter2.219 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5330-00-171-7835
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 88AX121 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
•
ACCOMMODATED SHAFT DIAMETER: 2.219 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 3.350 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
SEAL WIDTH: 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
SEALING ELEMENT STYLE: ANGULAR
•
MATERIAL: LEATHER OR RUBBER SYNTHETIC SEALING ELEMENT A
TECHNICAL CHARACTERISTICS (FLIS)
ACCOMMODATED SHAFT DIAMETER2.219 INCHES NOMINAL IN
HOUSING BORE DIAMETER3.350 INCHES NOMINAL IN
CASE STYLESQUARE
SEAL WIDTH0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
SEALING ELEMENT STYLEANGULAR
MATERIALLEATHER OR RUBBER SYNTHETIC SEALING ELEMENT A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
8442-3Interchangeable
interchangeable cross-reference
interchangeable
49292Interchangeable
interchangeable cross-reference
interchangeable
D636458-11Interchangeable
interchangeable cross-reference
interchangeable
D6364-1-120Interchangeable
interchangeable cross-reference
interchangeable
65X1496Interchangeable
interchangeable cross-reference
interchangeable
7542BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 88AX121?
88AX121 is a SEAL,PLAIN ENCASED.
What parts can replace 88AX121?
There are 23 known substitutes for 88AX121: 8442-3, 49292, D636458-11 and 20 more. Substitute compatibility should be verified for your specific system.
Is 88AX121 still available?
88AX121 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