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Technical Data Sheet
PartsTable / O-RING / HR640888-12
HR640888-12 ✓ 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: 1.989 INCHES MINIMUM AND 2.035 INCHES MAXIMUM IN, center_hole_diameter: 1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-291-7342, 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
HR640888-12
NSN: 5331-00-291-7342
FSC: 5331 — O-RING
CAGE: 15277 — GENERAL STEEL TANK CO (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter1.989 INCHES MINIMUM AND 2.035 INCHES MAXIMUM IN
center_hole_diameter1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-291-7342
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: HR640888-12 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 HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CENTER HOLE DIAMETER: 1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.989 INCHES MINIMUM AND 2.035 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER1.724 INCHES MINIMUM AND 1.744 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.989 INCHES MINIMUM AND 2.035 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
230-0001-00Interchangeable
interchangeable cross-reference
interchangeable
M100Interchangeable
interchangeable cross-reference
interchangeable
230-0001-000Interchangeable
interchangeable cross-reference
interchangeable
WS10998Interchangeable
interchangeable cross-reference
interchangeable
300217Interchangeable
interchangeable cross-reference
interchangeable
533540AW1PC85Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HR640888-12?
HR640888-12 is a O-RING.
What parts can replace HR640888-12?
There are 25 known substitutes for HR640888-12: 230-0001-00, M100, 230-0001-000 and 22 more. Substitute compatibility should be verified for your specific system.
Is HR640888-12 still available?
HR640888-12 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