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258-9946 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

258-9946: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include special_features: THE PARTICULAR STYLE OF THIS ITEM HAS 4 APERTURES, style_designator: NON-CIRCULAR, end_item_identification: ENGINE GROUP, part_name_assigned_by_controlling_agency: (INAVY) GASKET,CYL HEAD. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-548-5284, 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
258-9946
NSN: 5330-01-548-5284
FSC: 5330 — Packing and Gasket Materials
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
special_featuresTHE PARTICULAR STYLE OF THIS ITEM HAS 4 APERTURES
style_designatorNON-CIRCULAR
end_item_identificationENGINE GROUP
part_name_assigned_by_controlling_agency(INAVY) GASKET,CYL HEAD
NSN5330-01-548-5284
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 258-9946 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
•
STYLE DESIGNATOR: NON-CIRCULAR
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORNON-CIRCULAR
SPECIAL FEATURESTHE PARTICULAR STYLE OF THIS ITEM HAS 4 APERTURES
PART NAME ASSIGNED BY CONTROLLING AGENCY(INAVY) GASKET,CYL HEAD
END ITEM IDENTIFICATIONENGINE GROUP
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 1
237-1911Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 258-9946?
258-9946 is a GASKET.
What parts can replace 258-9946?
There is 1 known substitute for 258-9946: 237-1911. Substitute compatibility should be verified for your specific system.
What is the NSN for 258-9946?
258-9946 is cataloged in the U.S. Government catalog under NSN 5330-01-548-5284. 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.