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Technical Data Sheet
RU51089 ✓ 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

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: PLASTIC, length_under_shoulder: 0.740 INCHES NOMINAL IN, open_end_inside_diameter: 0.802 INCHES NOMINAL IN, closed_end_overall_diameter: 0.911 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-264-1203, 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
RU51089
NSN: 5340-00-264-1203
FSC: 5340
CAGE: D3309 — MTU AERO ENGINES AG (DEU)
SPECIFICATIONS
materialPLASTIC
length_under_shoulder0.740 INCHES NOMINAL IN
open_end_inside_diameter0.802 INCHES NOMINAL IN
closed_end_overall_diameter0.911 INCHES NOMINAL IN
NSN5340-00-264-1203
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: RU51089 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: PLASTIC
LENGTH UNDER SHOULDER: 0.740 INCHES NOMINAL IN
OPEN END INSIDE DIAMETER: 0.802 INCHES NOMINAL IN
CLOSED END OVERALL DIAMETER: 0.911 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC
LENGTH UNDER SHOULDER0.740 INCHES NOMINAL IN
OPEN END INSIDE DIAMETER0.802 INCHES NOMINAL IN
CLOSED END OVERALL DIAMETER0.911 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
MILC52078Upgraded Successor
successor cross-reference
successor
22SUpgraded Successor
successor cross-reference
successor
M5501/7-F38Upgraded Successor
successor cross-reference
successor
917966Upgraded Successor
successor cross-reference
successor
6735707-24Upgraded Successor
successor cross-reference
successor
17Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RU51089?
RU51089 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace RU51089?
There are 25 known substitutes for RU51089: MILC52078, 22S, M5501/7-F38 and 22 more. Substitute compatibility should be verified for your specific system.
Is RU51089 still available?
RU51089 is currently cancelled.
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