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Technical Data Sheet
PartsTable / O-RING / AS568-256MIL-P-25732
AS568-256MIL-P-25732 ✓ 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, temp_rating: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, outside_diameter: 5.969 INCHES MINIMUM AND 6.055 INCHES MAXIMUM IN, center_hole_diameter: 5.734 INCHES NOMINAL IN, elongation_percentage: 164 MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-199-1644, 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
AS568-256MIL-P-25732
NSN: 5331-00-199-1644
FSC: 5331 — O-RING
CAGE: 81343 — SOCIETY OF AUTOMOTIVE ENGINEERS INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
temp_rating-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter5.969 INCHES MINIMUM AND 6.055 INCHES MAXIMUM IN
center_hole_diameter5.734 INCHES NOMINAL IN
elongation_percentage164 MAXIMUM
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
material_document_and_classificationMIL-P-5516 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-00-199-1644
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS568-256MIL-P-25732 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
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CENTER HOLE DIAMETER: 5.711 INCHES MINIMUM AND 5.757 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 6.012 INCHES NOMINAL IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 160 MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER5.711 INCHES MINIMUM AND 5.757 INCHES MAXIMUM IN
OUTSIDE DIAMETER6.012 INCHES NOMINAL IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
ELONGATION PERCENTAGE160 MAXIMUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
AS568-256Interchangeable
interchangeable cross-reference
interchangeable
611980-4Interchangeable
interchangeable cross-reference
interchangeable
M83248/2-256Interchangeable
interchangeable cross-reference
interchangeable
5331PL0755715Interchangeable
interchangeable cross-reference
interchangeable
MS28775-256Interchangeable
interchangeable cross-reference
interchangeable
7377-256Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AS568-256MIL-P-25732?
AS568-256MIL-P-25732 is a O-RING.
What parts can replace AS568-256MIL-P-25732?
There are 12 known substitutes for AS568-256MIL-P-25732: AS568-256, 611980-4, M83248/2-256 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AS568-256MIL-P-25732?
AS568-256MIL-P-25732 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-199-1644. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026