PartsTable
Technical Data Sheet
PartsTable / O-RING / RT253-65-268
RT253-65-268 ✓ 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: 8.704 INCHES MINIMUM AND 8.820 INCHES MAXIMUM IN, center_hole_diameter: 8.454 INCHES MINIMUM AND 8.514 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 5331-00-263-8007, 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
RT253-65-268
NSN: 5331-00-263-8007
FSC: 5331 — O-RING
CAGE: 77969 — RUBBERCRAFT CORPORATION OF CALIFORNIA, LTD. DBA RUBBERCRAFT CORP (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter8.704 INCHES MINIMUM AND 8.820 INCHES MAXIMUM IN
center_hole_diameter8.454 INCHES MINIMUM AND 8.514 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-263-8007
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: RT253-65-268 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
•
OUTSIDE DIAMETER: 8.704 INCHES MINIMUM AND 8.820 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 8.454 INCHES MINIMUM AND 8.514 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER8.704 INCHES MINIMUM AND 8.820 INCHES MAXIMUM IN
CENTER HOLE DIAMETER8.454 INCHES MINIMUM AND 8.514 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
MS29513-27Interchangeable
interchangeable cross-reference
interchangeable
MS29513-027Interchangeable
interchangeable cross-reference
interchangeable
AMS-P-5315AInterchangeable
interchangeable cross-reference
interchangeable
2268Interchangeable
interchangeable cross-reference
interchangeable
2-268V0747-75Interchangeable
interchangeable cross-reference
interchangeable
8/1-268Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RT253-65-268?
RT253-65-268 is a O-RING.
What parts can replace RT253-65-268?
There are 31 known substitutes for RT253-65-268: MS29513-27, MS29513-027, AMS-P-5315A and 28 more. Substitute compatibility should be verified for your specific system.
Is RT253-65-268 still available?
RT253-65-268 is currently cancelled.
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Last verified: July 2026