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Technical Data Sheet
PartsTable / COMPONENT / 271443R91
271443R91 ✓ 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: RUBBER SYNTHETIC SEALING ELEMENT A, case_style: SQUARE, seal_width: 0.250 INCHES NOMINAL IN, outside_diameter: 1.128 INCHES NOMINAL IN, surface_treatment: PLASTIC CASE, housing_bore_diameter: 1.125 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-526-5783, 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
271443R91
NSN: 5330-00-526-5783
FSC: 5330
CAGE: 29510 — KOMATSU AMERICAN INTL CO (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEALING ELEMENT A
case_styleSQUARE
seal_width0.250 INCHES NOMINAL IN
outside_diameter1.128 INCHES NOMINAL IN
surface_treatmentPLASTIC CASE
housing_bore_diameter1.125 INCHES NOMINAL IN
sealing_element_styleANGULAR-OPPOSED
accommodated_shaft_diameter0.500 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed2000 FEET PER MINUTE FT
NSN5330-00-526-5783
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 271443R91 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: RUBBER SYNTHETIC SEALING ELEMENT B
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
CASE STYLE: SQUARE
•
SURFACE TREATMENT: PLASTIC CASE
•
SEAL WIDTH: 0.250 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR-OPPOSED
•
ACCOMMODATED SHAFT DIAMETER: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER SYNTHETIC SEALING ELEMENT B
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
CASE STYLESQUARE
MATERIALSTEEL CASE
SURFACE TREATMENTPLASTIC CASE
SEAL WIDTH0.250 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR-OPPOSED
ACCOMMODATED SHAFT DIAMETER0.500 INCHES NOMINAL IN
HOUSING BORE DIAMETER1.125 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
0303-6074Interchangeable
interchangeable cross-reference
interchangeable
5062Interchangeable
interchangeable cross-reference
interchangeable
G0158Interchangeable
interchangeable cross-reference
interchangeable
1620L23-010Interchangeable
interchangeable cross-reference
interchangeable
50-810023Interchangeable
interchangeable cross-reference
interchangeable
SCB91522Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 271443R91?
271443R91 is a SEAL,PLAIN ENCASED.
What parts can replace 271443R91?
There are 19 known substitutes for 271443R91: 0303-6074, 5062, G0158 and 16 more. Substitute compatibility should be verified for your specific system.
Is 271443R91 still available?
271443R91 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