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AS568B-156 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AS568B-156: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER, outside_diameter: 4.443 INCHES NOMINAL IN, center_hole_diameter: 4.207 INCHES MINIMUM AND 4.267 INCHES MAXIMUM IN, cross-sectional_height: 0.103 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-130-1387, 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-156
NSN: 5331-00-130-1387
FSC: 5331 — O-ring
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialRUBBER
outside_diameter4.443 INCHES NOMINAL IN
center_hole_diameter4.207 INCHES MINIMUM AND 4.267 INCHES MAXIMUM IN
cross-sectional_height0.103 INCHES NOMINAL IN
NSN5331-00-130-1387
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS568B-156 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: 0.103 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 4.443 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 4.207 INCHES MINIMUM AND 4.267 INCHES MAXIMUM IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.103 INCHES NOMINAL IN
OUTSIDE DIAMETER4.443 INCHES NOMINAL IN
CENTER HOLE DIAMETER4.207 INCHES MINIMUM AND 4.267 INCHES MAXIMUM IN
MATERIALRUBBER
SUBSTITUTES & CROSS-REFERENCES 7
2-156 N674-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
2-156N674-70Reference document
Same NSN cross-reference
Reference document — Secondary reference
P49708-0156Reference document
Same NSN cross-reference
Reference document — Secondary reference
ASTM D2000Reference document
Same NSN cross-reference
Reference document — Secondary reference
2-156N0674-70Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
58-14-09Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS568B-156?
AS568B-156 is a O-RING.
What parts can replace AS568B-156?
There are 7 known substitutes for AS568B-156: 2-156 N674-7, 2-156N674-70, P49708-0156 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS568B-156?
AS568B-156 is cataloged in the U.S. Government catalog under NSN 5331-00-130-1387. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.