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1775861 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1775861: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-STYRENE CLASS SBR OVERALL, hole_diameter: 0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN, hardness_rating: 40.0 SHORE DUROMETER A MINIMUM AND 50.0 SHORE DUROMETER A MAXIMUM OVERALL, outside_diameter: 4.490 INCHES MINIMUM AND 4.510 INCHES MAXIMUM IN, style_designator: CIRCULAR, aperture_diameter: 3.235 INCHES MINIMUM AND 3.265 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-618-9918, 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
1775861
NSN: 5330-00-618-9918
FSC: 5330 — Packing and Gasket Materials
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-STYRENE CLASS SBR OVERALL
hole_diameter0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
hardness_rating40.0 SHORE DUROMETER A MINIMUM AND 50.0 SHORE DUROMETER A MAXIMUM OVERALL
outside_diameter4.490 INCHES MINIMUM AND 4.510 INCHES MAXIMUM IN
style_designatorCIRCULAR
aperture_diameter3.235 INCHES MINIMUM AND 3.265 INCHES MAXIMUM IN
bolt_hole_quantity4
bolt_circle_diameter4.000 INCHES NOMINAL IN
cross-sectional_thickness0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-R-900 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-618-9918
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1775861 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
•
CROSS-SECTIONAL THICKNESS: 0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
•
HARDNESS RATING: 40.0 SHORE DUROMETER A MINIMUM AND 50.0 SHORE DUROMETER A MAXIMUM OVERALL
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-900 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 4.490 INCHES MINIMUM AND 4.510 INCHES MAXIMUM IN
•
APERTURE DIAMETER: 3.235 INCHES MINIMUM AND 3.265 INCHES MAXIMUM IN
•
BOLT HOLE QUANTITY: 4
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
HARDNESS RATING40.0 SHORE DUROMETER A MINIMUM AND 50.0 SHORE DUROMETER A MAXIMUM OVERALL
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-900 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER4.490 INCHES MINIMUM AND 4.510 INCHES MAXIMUM IN
APERTURE DIAMETER3.235 INCHES MINIMUM AND 3.265 INCHES MAXIMUM IN
BOLT HOLE QUANTITY4
BOLT CIRCLE DIAMETER4.000 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-STYRENE CLASS SBR OVERALL
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1775861?
1775861 is a GASKET.
What is the NSN for 1775861?
1775861 is cataloged in the U.S. Government catalog under NSN 5330-00-618-9918. 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.