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AS568B-259 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AS568B-259: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC, outside_diameter: 6.512 INCHES NOMINAL IN, center_hole_diameter: 6.194 INCHES MINIMUM AND 6.274 INCHES MAXIMUM IN, cross-sectional_height: 0.125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-579-6497, 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
AS568B-259
NSN: 5331-00-579-6497
FSC: 5331 — O-ring
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
outside_diameter6.512 INCHES NOMINAL IN
center_hole_diameter6.194 INCHES MINIMUM AND 6.274 INCHES MAXIMUM IN
cross-sectional_height0.125 INCHES NOMINAL IN
NSN5331-00-579-6497
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS568B-259 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: 0.125 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 6.512 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 6.194 INCHES MINIMUM AND 6.274 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.125 INCHES NOMINAL IN
OUTSIDE DIAMETER6.512 INCHES NOMINAL IN
CENTER HOLE DIAMETER6.194 INCHES MINIMUM AND 6.274 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
SUBSTITUTES & CROSS-REFERENCES 3
D40064Reference document
Same NSN cross-reference
Reference document — Secondary reference
RD39502Reference document
Same NSN cross-reference
Reference document — Secondary reference
5430-37Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS568B-259?
AS568B-259 is a O-RING.
What parts can replace AS568B-259?
There are 3 known substitutes for AS568B-259: D40064, RD39502, 5430-37. Substitute compatibility should be verified for your specific system.
What is the NSN for AS568B-259?
AS568B-259 is cataloged in the U.S. Government catalog under NSN 5331-00-579-6497. This indicates validated use in U.S. government and defense supply chains.
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