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10186991 — PLUG,EXPANSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

10186991: PLUG,EXPANSION.

The PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include height: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN, material: STEEL, outside_diameter: 1.006 INCHES MINIMUM AND 1.009 INCHES MAXIMUM IN, style_designator: CUP, surface_treatment: OXIDE, material_thickness: 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-090-8909, 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
10186991
NSN: 5340-01-090-8909
FSC: 5340 — Hardware, Commercial
CAGE: A486G — NIMIKKEISTOKESKUS NCB FINLAND (FIN)
SPECIFICATIONS
height0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
materialSTEEL
outside_diameter1.006 INCHES MINIMUM AND 1.009 INCHES MAXIMUM IN
style_designatorCUP
surface_treatmentOXIDE
material_thickness0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
material_document_and_classificationAMS 5040 ASSN STD SINGLE MATERIAL RESPONSE
surface_treatment_document_and_classificationAMS 2485 ASSN STD SINGLE TREATMENT RESPONSE
NSN5340-01-090-8909
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 10186991 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: AMS 2485 ASSN STD SINGLE TREATMENT RESPONSE
•
OUTSIDE DIAMETER: 1.006 INCHES MINIMUM AND 1.009 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CUP
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5040 ASSN STD SINGLE MATERIAL RESPONSE
•
MATERIAL THICKNESS: 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
•
HEIGHT: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
•
SURFACE TREATMENT: OXIDE
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONAMS 2485 ASSN STD SINGLE TREATMENT RESPONSE
OUTSIDE DIAMETER1.006 INCHES MINIMUM AND 1.009 INCHES MAXIMUM IN
STYLE DESIGNATORCUP
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5040 ASSN STD SINGLE MATERIAL RESPONSE
MATERIAL THICKNESS0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
HEIGHT0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
SURFACE TREATMENTOXIDE
MATERIALSTEEL
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 2
2 0040-338Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS 9176-20Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 10186991?
10186991 is a PLUG,EXPANSION.
What parts can replace 10186991?
There are 2 known substitutes for 10186991: 2 0040-338, MS 9176-20. Substitute compatibility should be verified for your specific system.
What is the NSN for 10186991?
10186991 is cataloged in the U.S. Government catalog under NSN 5340-01-090-8909. 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.