PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 300.558
300.558 ✓ 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 300.558 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-618-5677, 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
300.558
NSN: 5330-01-618-5677
FSC: 5330
CAGE: 63743 — WARD LEONARD CT LLC (USA)
SPECIFICATIONS
Part Number300.558
NSN5330-01-618-5677
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 300.558 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
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONA-405TNZ-43
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
30055-8Interchangeable
interchangeable cross-reference
interchangeable
276-7Interchangeable
interchangeable cross-reference
interchangeable
0211-012-002-00Interchangeable
interchangeable cross-reference
interchangeable
925A317-1Interchangeable
interchangeable cross-reference
interchangeable
10615Interchangeable
interchangeable cross-reference
interchangeable
220-1586-080Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 300.558?
300.558 is a 300.558.
What parts can replace 300.558?
There are 6 known substitutes for 300.558: 30055-8, 276-7, 0211-012-002-00 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 300.558?
300.558 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-618-5677. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026