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Technical Data Sheet
PartsTable / O-RING / B398120-72
B398120-72 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 1.193 INCHES NOMINAL IN, center_hole_diameter: 0.981 INCHES MINIMUM AND 0.993 INCHES MAXIMUM IN, cross-sectional_height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-097-6409, 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
B398120-72
NSN: 5331-00-097-6409
FSC: 5331 — O-RING
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter1.193 INCHES NOMINAL IN
center_hole_diameter0.981 INCHES MINIMUM AND 0.993 INCHES MAXIMUM IN
cross-sectional_height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
NSN5331-00-097-6409
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B398120-72 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: 0.981 INCHES MINIMUM AND 0.993 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.193 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.981 INCHES MINIMUM AND 0.993 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.193 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
5905001168556Interchangeable
interchangeable cross-reference
interchangeable
CB22K5PCTInterchangeable
interchangeable cross-reference
interchangeable
BUWEPSDWG1820811-105Interchangeable
interchangeable cross-reference
interchangeable
7HB539Interchangeable
interchangeable cross-reference
interchangeable
SE12IN FN-52 SHT 3Interchangeable
interchangeable cross-reference
interchangeable
500292Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B398120-72?
B398120-72 is a O-RING.
What parts can replace B398120-72?
There are 20 known substitutes for B398120-72: 5905001168556, CB22K5PCT, BUWEPSDWG1820811-105 and 17 more. Substitute compatibility should be verified for your specific system.
Is B398120-72 still available?
B398120-72 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