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172557 — PLUG,EXPANSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

172557: PLUG,EXPANSION.

The PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include end_item_identification: AIRCRAFT KDC-10, LIGHT INSTL-UTILITY, MCDONNELL DOUGLAS CORP. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-276-5849, 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
172557
NSN: 5340-00-276-5849
NIINs: 002765849, 014753202
FSC: 5340 — Hardware, Commercial
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
end_item_identificationAIRCRAFT KDC-10, LIGHT INSTL-UTILITY, MCDONNELL DOUGLAS CORP
NSN5340-00-276-5849
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 172557 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
•
RADIUS: 1.625 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 1.188 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL THICKNESS: 0.094 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
RADIUS1.625 INCHES NOMINAL IN
OUTSIDE DIAMETER1.188 INCHES NOMINAL IN
STYLE DESIGNATORCONCAVE
MATERIAL THICKNESS0.094 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM
MATERIALSTEEL
SUBSTITUTES & CROSS-REFERENCES 6
117921Reference document
Same NSN cross-reference
Reference document — Secondary reference
71237Reference document
Same NSN cross-reference
Reference document — Secondary reference
8P1889Reference document
Same NSN cross-reference
Reference document — Secondary reference
9411375Reference document
Same NSN cross-reference
Reference document — Secondary reference
541401Reference document
Same NSN cross-reference
Reference document — Secondary reference
30112Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 172557?
172557 is a PLUG,EXPANSION.
What parts can replace 172557?
There are 6 known substitutes for 172557: 117921, 71237, 8P1889 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 172557?
172557 is cataloged in the U.S. Government catalog under NSN 5340-00-276-5849. 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.