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4056145 — CASE,DIFFUSER,AIRCRAFT GAS TURBI

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4056145: CASE,DIFFUSER,AIRCRAFT GAS TURBI.

CASE,DIFFUSER,AIRCRAFT GAS TURBI. Key specifications include diameter: 28.245 INCHES MINIMUM AND 28.265 INCHES MAXIMUM IN, overall_length: 17.818 INCHES MINIMUM AND 17.822 INCHES MAXIMUM IN, end_item_identification: ACFT ENG F100, engine_section_location: DIFFUSER. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-789-6647, 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
4056145
NSN: 5331-00-789-6647
NIINs: 007896647, 010950150
FSC: 5331 — O-ring
CAGE: 6N299 — AGCO CORP PARTS OPN (USA)
SPECIFICATIONS
diameter28.245 INCHES MINIMUM AND 28.265 INCHES MAXIMUM IN
overall_length17.818 INCHES MINIMUM AND 17.822 INCHES MAXIMUM IN
end_item_identificationACFT ENG F100
engine_section_locationDIFFUSER
NSN5331-00-789-6647
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4056145 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
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 3.469 INCHES MINIMUM AND 3.499 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
CENTER HOLE DIAMETER3.469 INCHES MINIMUM AND 3.499 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
SUBSTITUTES & CROSS-REFERENCES 2
4056145-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
139051Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4056145?
4056145 is a CASE,DIFFUSER,AIRCRAFT GAS TURBI.
What parts can replace 4056145?
There are 2 known substitutes for 4056145: 4056145-8, 139051. Substitute compatibility should be verified for your specific system.
What is the NSN for 4056145?
4056145 is cataloged in the U.S. Government catalog under NSN 5331-00-789-6647. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.