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Technical Data Sheet
PartsTable / COMPONENT / 5139989
5139989 ✓ 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 PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include head_style: BUTTON, head_height: 0.141 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.562 INCHES NOMINAL IN, thread_length: 0.312 INCHES MAXIMUM IN, screw_material: STEEL COMP 1018 OR STEEL COMP 1022. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-255-4423, 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
5139989
NSN: 5340-00-255-4423
FSC: 5340
CAGE: 72582 — ROLLS-ROYCE SOLUTIONS AMERICA INC (USA)
SPECIFICATIONS
head_styleBUTTON
head_height0.141 INCHES NOMINAL IN
thread_class2A A
head_diameter0.562 INCHES NOMINAL IN
thread_length0.312 INCHES MAXIMUM IN
screw_materialSTEEL COMP 1018 OR STEEL COMP 1022
fastener_length0.312 INCHES NOMINAL IN
thread_directionRIGHT-HAND
internal_drive_styleCROSS RECESS TYPE 1
nominal_thread_diameter0.190 INCHES IN
screw_surface_treatmentPHOSPHATE
thread_quantity_per_inch32
NSN5340-00-255-4423
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5139989 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
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL: STEEL CORROSION RESISTING
•
OUTSIDE DIAMETER: 2.5000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORCONCAVE
MATERIALSTEEL CORROSION RESISTING
OUTSIDE DIAMETER2.5000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
8927579Upgraded Successor
successor cross-reference
successor
5117344Upgraded Successor
successor cross-reference
successor
1DD273Upgraded Successor
successor cross-reference
successor
5139989Interchangeable
interchangeable cross-reference
interchangeable
A20447Interchangeable
interchangeable cross-reference
interchangeable
4730PL0943847Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5139989?
5139989 is a PLUG,EXPANSION.
What parts can replace 5139989?
There are 7 known substitutes for 5139989: 8927579, 5117344, 1DD273 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5139989?
5139989 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-255-4423. 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