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Technical Data Sheet
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AS3125-09 — PLUG,EXPANSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AS3125-09: PLUG,EXPANSION.

The PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include material: STEEL, outside_diameter: 0.405 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN, style_designator: CUP. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-488-8272, 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
AS3125-09
NSN: 5340-01-488-8272
FSC: 5340 — Hardware, Commercial
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialSTEEL
outside_diameter0.405 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
style_designatorCUP
NSN5340-01-488-8272
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS3125-09 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
•
OUTSIDE DIAMETER: 0.405 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CUP
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.405 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
STYLE DESIGNATORCUP
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 1
SAE-AS3125Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 AS3125-09?
AS3125-09 is a PLUG,EXPANSION.
What parts can replace AS3125-09?
There is 1 known substitute for AS3125-09: SAE-AS3125. Substitute compatibility should be verified for your specific system.
What is the NSN for AS3125-09?
AS3125-09 is cataloged in the U.S. Government catalog under NSN 5340-01-488-8272. This indicates validated use in U.S. government and defense supply chains.
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