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PartsTable / COMPONENT / H260K204
H260K204 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The GASKET is a the manufacturer industrial component. Key specifications include material: PAPER AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL, hole_diameter: 0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, outside_diameter: 5.125 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 3.875 INCHES NOMINAL IN, bolt_circle_diameter: 4.500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-091-9078, 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
H260K204
NSN: 5330-00-091-9078
FSC: 5330
CAGE: 63728 — SEALCRAFT CORPORATION (USA)
SPECIFICATIONS
materialPAPER AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
hole_diameter0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
outside_diameter5.125 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter3.875 INCHES NOMINAL IN
bolt_hole_quantity6
bolt_circle_diameter4.500 INCHES NOMINAL IN
cross-sectional_thickness0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-G-12803 NO. +3444-A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-091-9078
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: H260K204 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 SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
STYLE DESIGNATOR: CIRCULAR
•
OUTSIDE DIAMETER: 5.125 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803 NO. +3444-A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
APERTURE DIAMETER: 3.875 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
•
MATERIAL: PAPER AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
•
BOLT CIRCLE DIAMETER: 4.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
STYLE DESIGNATORCIRCULAR
OUTSIDE DIAMETER5.125 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803 NO. +3444-A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
APERTURE DIAMETER3.875 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
MATERIALPAPER AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
BOLT CIRCLE DIAMETER4.500 INCHES NOMINAL IN
HOLE DIAMETER0.281 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
BOLT HOLE QUANTITY6
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
K-11017Interchangeable
interchangeable cross-reference
interchangeable
L3006-33Interchangeable
interchangeable cross-reference
interchangeable
1043-2Interchangeable
interchangeable cross-reference
interchangeable
K1-16379Interchangeable
interchangeable cross-reference
interchangeable
KI16379Interchangeable
interchangeable cross-reference
interchangeable
69C2138Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H260K204?
H260K204 is a GASKET.
What parts can replace H260K204?
There are 17 known substitutes for H260K204: K-11017, L3006-33, 1043-2 and 14 more. Substitute compatibility should be verified for your specific system.
Is H260K204 still available?
H260K204 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026