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Technical Data Sheet
PartsTable / COMPONENT / 721871
721871 ✓ 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 AND RUBBER SYNTHETIC SEALING ELEMENT, case_style: SQUARE, seal_width: 0.438 INCHES NOMINAL IN, housing_bore_diameter: 2.125 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 1.187 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-580-8529, 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
721871
NSN: 5330-00-580-8529
FSC: 5330
CAGE: 00447 — WABCO CONSTRUCTION AND MINING EQUIPMENT GROUP INDIANAPOLIS PLANT AN AMERICAN STANDARD INC CO (USA)
SPECIFICATIONS
materialLEATHER AND RUBBER SYNTHETIC SEALING ELEMENT
case_styleSQUARE
seal_width0.438 INCHES NOMINAL IN
housing_bore_diameter2.125 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter1.187 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5330-00-580-8529
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 721871 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
•
MATERIAL: LEATHER AND RUBBER SYNTHETIC SEALING ELEMENT
•
HOUSING BORE DIAMETER: 2.125 INCHES NOMINAL IN
•
SEAL WIDTH: 0.438 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 1.187 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALLEATHER AND RUBBER SYNTHETIC SEALING ELEMENT
HOUSING BORE DIAMETER2.125 INCHES NOMINAL IN
SEAL WIDTH0.438 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER1.187 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
21216Interchangeable
interchangeable cross-reference
interchangeable
L686707-2Interchangeable
interchangeable cross-reference
interchangeable
A-A-50553Interchangeable
interchangeable cross-reference
interchangeable
129Interchangeable
interchangeable cross-reference
interchangeable
2-209AX2029BInterchangeable
interchangeable cross-reference
interchangeable
209AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 721871?
721871 is a SEAL,PLAIN ENCASED.
What parts can replace 721871?
There are 21 known substitutes for 721871: 21216, L686707-2, A-A-50553 and 18 more. Substitute compatibility should be verified for your specific system.
Is 721871 still available?
721871 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