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Technical Data Sheet
PartsTable / O-RING / 1240599
1240599 ✓ 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 CHLOROPRENE CLASS CR, center_hole_diameter: 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN, cross-sectional_height: 0.084 INCHES MINIMUM AND 0.099 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 5331-00-809-8212, 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
1240599
NSN: 5331-00-809-8212
FSC: 5331 — O-RING
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR
center_hole_diameter1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
cross-sectional_height0.084 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
NSN5331-00-809-8212
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1240599 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 CHLOROPRENE CLASS CR
•
CENTER HOLE DIAMETER: 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.084 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER CHLOROPRENE CLASS CR
CENTER HOLE DIAMETER1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.084 INCHES MINIMUM AND 0.099 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
5835Interchangeable
interchangeable cross-reference
interchangeable
111-046-0002Interchangeable
interchangeable cross-reference
interchangeable
12-35Interchangeable
interchangeable cross-reference
interchangeable
R35Interchangeable
interchangeable cross-reference
interchangeable
G-35Interchangeable
interchangeable cross-reference
interchangeable
5835-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1240599?
1240599 is a O-RING.
What parts can replace 1240599?
There are 17 known substitutes for 1240599: 5835, 111-046-0002, 12-35 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1240599?
1240599 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-809-8212. 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