PartsTable
Technical Data Sheet
PartsTable / O-RING / 5253-635
5253-635 ✓ 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. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-113-3804, 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
5253-635
NSN: 5331-00-113-3804
FSC: 5331 — O-RING
CAGE: 05869 — RAYTHEON COMPANY DIV RMD STRATEGIC (USA)
SPECIFICATIONS
Part Number5253-635
NSN5331-00-113-3804
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5253-635 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
72-2539-106Interchangeable
interchangeable cross-reference
interchangeable
2AP253Interchangeable
interchangeable cross-reference
interchangeable
150-411KPC266Interchangeable
interchangeable cross-reference
interchangeable
21NE-066Interchangeable
interchangeable cross-reference
interchangeable
SN-6Interchangeable
interchangeable cross-reference
interchangeable
1535Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5253-635?
5253-635 is a O-RING.
What parts can replace 5253-635?
There are 25 known substitutes for 5253-635: 72-2539-106, 2AP253, 150-411KPC266 and 22 more. Substitute compatibility should be verified for your specific system.
Is 5253-635 still available?
5253-635 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026