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Technical Data Sheet
PartsTable / O-RING / JT 11.89X1.98-20B7
JT 11.89X1.98-20B7 ✓ 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 JT 11.89X1.98-20B7 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-582-7475, 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
JT 11.89X1.98-20B7
NSN: 5331-00-582-7475
FSC: 5331 — O-RING
CAGE: F8226 — STACEM (FRA)
SPECIFICATIONS
Part NumberJT 11.89X1.98-20B7
NSN5331-00-582-7475
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: JT 11.89X1.98-20B7 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
•
CENTER HOLE DIAMETER: 0.463 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 200 MAXIMUM
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
OUTSIDE DIAMETER: 0.624 INCHES NOMINAL IN
•
HARDNESS RATING: 65.0 SHORE DUROMETER A NOMINAL
•
CROSS-SECTIONAL HEIGHT: 0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.463 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN
ELONGATION PERCENTAGE200 MAXIMUM
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
OUTSIDE DIAMETER0.624 INCHES NOMINAL IN
HARDNESS RATING65.0 SHORE DUROMETER A NOMINAL
CROSS-SECTIONAL HEIGHT0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
8526718Interchangeable
interchangeable cross-reference
interchangeable
50049-12Interchangeable
interchangeable cross-reference
interchangeable
306118Interchangeable
interchangeable cross-reference
interchangeable
4192800-90Interchangeable
interchangeable cross-reference
interchangeable
151-041Interchangeable
interchangeable cross-reference
interchangeable
1855467-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is JT 11.89X1.98-20B7?
JT 11.89X1.98-20B7 is a JT 11.89X1.98-20B7.
What parts can replace JT 11.89X1.98-20B7?
There are 14 known substitutes for JT 11.89X1.98-20B7: 8526718, 50049-12, 306118 and 11 more. Substitute compatibility should be verified for your specific system.
Is JT 11.89X1.98-20B7 still available?
JT 11.89X1.98-20B7 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