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Technical Data Sheet
PartsTable / COMPONENT / 21811PC6B1310
21811PC6B1310 ✓ 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: 0.500 INCHES NOMINAL IN, housing_bore_diameter: 2.686 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 1.687 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-178-2249, 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
21811PC6B1310
NSN: 5330-00-178-2249
FSC: 5330
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.500 INCHES NOMINAL IN
housing_bore_diameter2.686 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter1.687 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5330-00-178-2249
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21811PC6B1310 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 MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
SEAL WIDTH: 0.500 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 1.687 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
•
HOUSING BORE DIAMETER: 2.686 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
SEAL WIDTH0.500 INCHES NOMINAL IN
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER1.687 INCHES NOMINAL IN
MATERIALSTEEL CASE
HOUSING BORE DIAMETER2.686 INCHES NOMINAL IN
MATERIALLEATHER SEALING ELEMENT
SEALING ELEMENT STYLEANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
BT843Interchangeable
interchangeable cross-reference
interchangeable
25942MInterchangeable
interchangeable cross-reference
interchangeable
FF-B-187AInterchangeable
interchangeable cross-reference
interchangeable
RELEASE335Interchangeable
interchangeable cross-reference
interchangeable
843Interchangeable
interchangeable cross-reference
interchangeable
7913198-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21811PC6B1310?
21811PC6B1310 is a SEAL,PLAIN ENCASED.
What parts can replace 21811PC6B1310?
There are 20 known substitutes for 21811PC6B1310: BT843, 25942M, FF-B-187A and 17 more. Substitute compatibility should be verified for your specific system.
Is 21811PC6B1310 still available?
21811PC6B1310 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