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Technical Data Sheet
PartsTable / COMPONENT / 11B254109
11B254109 ✓ 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 COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 2.7500 INCHES NOMINAL IN, length: 4.5000 INCHES NOMINAL IN, material: ALUMINUM, peripheral_shape_style: RECTANGLE, FOUR HOLES, cross-sectional_shape_style: FLAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-432-0440, 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
11B254109
NSN: 5340-01-432-0440
FSC: 5340
CAGE: 59678 — COMBAT CAPABILITIES DEVELOPMENT COMMAND ARMAMENTS CENTER DBA US ARMY COMBAT CAPABILITIES DEVELOPMENT COMMAND ARMAMENTS CENTER (USA)
SPECIFICATIONS
width2.7500 INCHES NOMINAL IN
length4.5000 INCHES NOMINAL IN
materialALUMINUM
peripheral_shape_styleRECTANGLE, FOUR HOLES
cross-sectional_shape_styleFLAT
NSN5340-01-432-0440
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 11B254109 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
•
PERIPHERAL SHAPE STYLE: RECTANGLE, FOUR HOLES
•
CROSS-SECTIONAL SHAPE STYLE: FLAT
•
LENGTH: 4.5000 INCHES NOMINAL IN
•
WIDTH: 2.7500 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL SHAPE STYLERECTANGLE, FOUR HOLES
CROSS-SECTIONAL SHAPE STYLEFLAT
LENGTH4.5000 INCHES NOMINAL IN
WIDTH2.7500 INCHES NOMINAL IN
MATERIALALUMINUM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
51740Interchangeable
interchangeable cross-reference
interchangeable
7199058Interchangeable
interchangeable cross-reference
interchangeable
436RL-9Interchangeable
interchangeable cross-reference
interchangeable
GGG-C-105Interchangeable
interchangeable cross-reference
interchangeable
5210PL1605632Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11B254109?
11B254109 is a COVER,ACCESS.
What parts can replace 11B254109?
There are 5 known substitutes for 11B254109: 51740, 7199058, 436RL-9 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 11B254109?
11B254109 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-432-0440. 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