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AS568B-239 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AS568B-239: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER ETHYLENE-PROPYLENE CLASS EPM, outside_diameter: 3.887 INCHES NOMINAL IN, center_hole_diameter: 3.594 INCHES MINIMUM AND 3.624 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-001-8187, 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-239
NSN: 5331-00-001-8187
NIINs: 000018187, 001733037
FSC: 5331 — O-ring
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER ETHYLENE-PROPYLENE CLASS EPM
outside_diameter3.887 INCHES NOMINAL IN
center_hole_diameter3.594 INCHES MINIMUM AND 3.624 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-001-8187
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS568B-239 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
•
OUTSIDE DIAMETER: 3.887 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 3.594 INCHES MINIMUM AND 3.624 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.887 INCHES NOMINAL IN
CENTER HOLE DIAMETER3.594 INCHES MINIMUM AND 3.624 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
SUBSTITUTES & CROSS-REFERENCES 2
G527-500-001Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ARP568-239MILP5510Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS568B-239?
AS568B-239 is a O-RING.
What parts can replace AS568B-239?
There are 2 known substitutes for AS568B-239: G527-500-001, ARP568-239MILP5510. Substitute compatibility should be verified for your specific system.
What is the NSN for AS568B-239?
AS568B-239 is cataloged in the U.S. Government catalog under NSN 5331-00-001-8187. This indicates validated use in U.S. government and defense supply chains.
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