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Technical Data Sheet
PartsTable / O-RING / B3112781T9
B3112781T9 ✓ 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 SYNTHETIC, center_hole_diameter: 3.150 INCHES MINIMUM AND 3.180 INCHES MAXIMUM IN, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-029-0660, 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
B3112781T9
NSN: 5331-01-029-0660
FSC: 5331 — O-RING
CAGE: 58163 — MEGGITT (NORTH HOLLYWOOD), INC. DBA MEGGITT CONTROL SYSTEMS DIV MEGGITT DEFENSE SYSTEMS, INC. (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
center_hole_diameter3.150 INCHES MINIMUM AND 3.180 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
NSN5331-01-029-0660
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B3112781T9 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
•
CENTER HOLE DIAMETER: 3.150 INCHES MINIMUM AND 3.180 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER3.150 INCHES MINIMUM AND 3.180 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
102-5630P1Interchangeable
interchangeable cross-reference
interchangeable
30667Interchangeable
interchangeable cross-reference
interchangeable
30084Interchangeable
interchangeable cross-reference
interchangeable
26758Interchangeable
interchangeable cross-reference
interchangeable
19-046Interchangeable
interchangeable cross-reference
interchangeable
MS 35206-230Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B3112781T9?
B3112781T9 is a O-RING.
What parts can replace B3112781T9?
There are 16 known substitutes for B3112781T9: 102-5630P1, 30667, 30084 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B3112781T9?
B3112781T9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-029-0660. 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