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U647 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

U647: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC AND CORK OVERALL, hardness_rating: 70.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM OVERALL, outside_diameter: 2.188 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 1.312 INCHES NOMINAL IN, maximum_pressure_rating: 300.0 POUNDS PER SQUARE INCH (PSI) LBS. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-526-4677, 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
U647
NSN: 5330-00-526-4677
FSC: 5330 — Packing and Gasket Materials
CAGE: 78943 — TRIUMPH THERMAL SYSTEMS, LLC (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC AND CORK OVERALL
hardness_rating70.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM OVERALL
outside_diameter2.188 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter1.312 INCHES NOMINAL IN
maximum_pressure_rating300.0 POUNDS PER SQUARE INCH (PSI) LBS
cross-sectional_thickness0.062 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-C-6183,TY 1,CL 1,GR C MIL SPEC ALL MATERIAL RESPONSES OVERALL
NSN5330-00-526-4677
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: U647 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: 0.062 INCHES NOMINAL IN
•
MAXIMUM PRESSURE RATING: 300.0 POUNDS PER SQUARE INCH (PSI) LBS
•
HARDNESS RATING: 70.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM OVERALL
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-6183,TY 1,CL 1,GR C MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 2.188 INCHES NOMINAL IN
•
APERTURE DIAMETER: 1.312 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.062 INCHES NOMINAL IN
MAXIMUM PRESSURE RATING300.0 POUNDS PER SQUARE INCH (PSI) LBS
HARDNESS RATING70.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MAXIMUM OVERALL
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-6183,TY 1,CL 1,GR C MIL SPEC ALL MATERIAL RESPONSES OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER2.188 INCHES NOMINAL IN
APERTURE DIAMETER1.312 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC AND CORK 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 2
572164Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
35A1709Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 U647?
U647 is a GASKET.
What parts can replace U647?
There are 2 known substitutes for U647: 572164, 35A1709. Substitute compatibility should be verified for your specific system.
What is the NSN for U647?
U647 is cataloged in the U.S. Government catalog under NSN 5330-00-526-4677. 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.