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5205549 — CAP,PROTECTIVE,DUST AND MOISTURE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5205549: CAP,PROTECTIVE,DUST AND MOISTURE.

CAP,PROTECTIVE,DUST AND MOISTURE. Key specifications include material: RUBBER, design_type: FRICTION, overall_diameter: 5.000 INCHES NOMINAL IN, special_features: ROUND BEAD AT ID; INSIDE BOSS 1.62 IN. DIA; MATL TYPE S,CLASS SC410; COLOR RED IN, inside_diameter_length: 4.120 INCHES NOMINAL IN, material_document_and_classification: MIL-R-3065 MIL SPEC SINGLE MATERIAL RESPONSE.

This part is cataloged in the U.S. Government catalog under NSN 5340-01-352-8188, 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
5205549
NSN: 5340-01-352-8188
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialRUBBER
design_typeFRICTION
overall_diameter5.000 INCHES NOMINAL IN
special_featuresROUND BEAD AT ID; INSIDE BOSS 1.62 IN. DIA; MATL TYPE S,CLASS SC410; COLOR RED IN
inside_diameter_length4.120 INCHES NOMINAL IN
material_document_and_classificationMIL-R-3065 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-352-8188
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5205549 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
•
DESIGN TYPE: FRICTION
•
OVERALL DIAMETER: 5.000 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-3065 MIL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: RUBBER
•
INSIDE DIAMETER LENGTH: 4.120 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OVERALL DIAMETER5.000 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-3065 MIL SPEC SINGLE MATERIAL RESPONSE
SPECIAL FEATURESROUND BEAD AT ID; INSIDE BOSS 1.62 IN. DIA; MATL TYPE S,CLASS SC410; COLOR RED IN
MATERIALRUBBER
INSIDE DIAMETER LENGTH4.120 INCHES NOMINAL IN
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

No substitute or cross-reference records for this part.

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 5205549?
5205549 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What is the NSN for 5205549?
5205549 is cataloged in the U.S. Government catalog under NSN 5340-01-352-8188. 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.