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Technical Data Sheet
PartsTable / COMPONENT / 265BU
265BU ✓ 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 KEY BLANK is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-473-5950, 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
265BU
NSN: 5340-00-473-5950
FSC: 5340
CAGE: 53085 — SARGENT & GREENLEAF INC (USA)
SPECIFICATIONS
Part Number265BU
NSN5340-00-473-5950
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 265BU 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 12
0262-1Interchangeable
interchangeable cross-reference
interchangeable
7127121-30Interchangeable
interchangeable cross-reference
interchangeable
7127121-10Interchangeable
interchangeable cross-reference
interchangeable
A102Interchangeable
interchangeable cross-reference
interchangeable
27E126AND20C250Interchangeable
interchangeable cross-reference
interchangeable
9XR10-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 265BU?
265BU is a KEY BLANK.
What parts can replace 265BU?
There are 12 known substitutes for 265BU: 0262-1, 7127121-30, 7127121-10 and 9 more. Substitute compatibility should be verified for your specific system.
Is 265BU still available?
265BU 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