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2639728 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2639728: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE CLASS Q OVERALL, hole_diameter: 0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 1.880 INCHES MINIMUM AND 1.920 INCHES MAXIMUM IN, aperture_width: 1.020 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN, overall_length: 4.275 INCHES MINIMUM AND 4.295 INCHES MAXIMUM IN, aperture_length: 4.020 INCHES MINIMUM AND 4.040 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-463-7423, 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
2639728
NSN: 5330-00-463-7423
FSC: 5330 — Packing and Gasket Materials
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q OVERALL
hole_diameter0.165 INCHES MINIMUM AND 0.175 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
overall_width1.880 INCHES MINIMUM AND 1.920 INCHES MAXIMUM IN
aperture_width1.020 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN
overall_length4.275 INCHES MINIMUM AND 4.295 INCHES MAXIMUM IN
aperture_length4.020 INCHES MINIMUM AND 4.040 INCHES MAXIMUM IN
hardness_rating55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM OVERALL
style_designatorNON-CIRCULAR
bolt_hole_quantity4
cross-sectional_thickness0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationZZ-R-765,CL 3,GR 60 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-463-7423
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2639728 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: 0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
•
HARDNESS RATING: 55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM OVERALL
•
STYLE DESIGNATOR: NON-CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: ZZ-R-765,CL 3,GR 60 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
APERTURE WIDTH: 1.020 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
HARDNESS RATING55.0 SHORE DUROMETER A MINIMUM AND 65.0 SHORE DUROMETER A MAXIMUM OVERALL
STYLE DESIGNATORNON-CIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONZZ-R-765,CL 3,GR 60 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH4.275 INCHES MINIMUM AND 4.295 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH1.880 INCHES MINIMUM AND 1.920 INCHES MAXIMUM IN
APERTURE WIDTH1.020 INCHES MINIMUM AND 1.040 INCHES MAXIMUM IN
APERTURE LENGTH4.020 INCHES MINIMUM AND 4.040 INCHES MAXIMUM IN
BOLT HOLE QUANTITY4
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 2639728?
2639728 is a GASKET.
What is the NSN for 2639728?
2639728 is cataloged in the U.S. Government catalog under NSN 5330-00-463-7423. 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.