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Technical Data Sheet
PartsTable / COMPONENT / 20143-121
20143-121 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, hole_diameter: 0.130 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN, overall_length: 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN, style_designator: NON-CIRCULAR, aperture_diameter: 0.500 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-686-0978, 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
20143-121
NSN: 5330-00-686-0978
FSC: 5330
CAGE: 02101 — OECO, LLC DBA PACIFIC SCIENTIFIC OECO (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
hole_diameter0.130 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
overall_length0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
style_designatorNON-CIRCULAR
aperture_diameter0.500 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
bolt_hole_quantity4
outside_corner_radius0.109 INCHES NOMINAL IN
cross-sectional_thickness0.016 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
outside_edge_to_bolt_hole_center_distance_along_width0.109 INCHES NOMINAL IN
outside_edge_to_bolt_hole_center_distance_along_length0.109 INCHES NOMINAL IN
NSN5330-00-686-0978
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 20143-121 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
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH: 0.109 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 4
•
OUTSIDE CORNER RADIUS: 0.109 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.130 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
CROSS-SECTIONAL THICKNESS: 0.016 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
•
APERTURE DIAMETER: 0.500 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH0.109 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
OUTSIDE CORNER RADIUS0.109 INCHES NOMINAL IN
HOLE DIAMETER0.130 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OVERALL LENGTH0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN
CROSS-SECTIONAL THICKNESS0.016 INCHES MINIMUM AND 0.032 INCHES MAXIMUM IN
APERTURE DIAMETER0.500 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG WIDTH0.109 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
5136-00-189-3169Interchangeable
interchangeable cross-reference
interchangeable
05468Interchangeable
interchangeable cross-reference
interchangeable
1SP3/4Interchangeable
interchangeable cross-reference
interchangeable
10-101949-8Interchangeable
interchangeable cross-reference
interchangeable
11611471Interchangeable
interchangeable cross-reference
interchangeable
SR14510Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20143-121?
20143-121 is a GASKET.
What parts can replace 20143-121?
There are 12 known substitutes for 20143-121: 5136-00-189-3169, 05468, 1SP3/4 and 9 more. Substitute compatibility should be verified for your specific system.
Is 20143-121 still available?
20143-121 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