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ST7M258H300 — SEAL,PLAIN

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

ST7M258H300: SEAL,PLAIN.

The SEAL,PLAIN is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5330-01-357-8005, 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
ST7M258H300
NSN: 5330-01-357-8005
FSC: 5330 — Packing and Gasket Materials
CAGE: 60980 — MEGGITT OREGON INC DBA MEGGITT OREGON INC DIV MEGGITT POLYMERS & COMPOSITES (USA)
SPECIFICATIONS
Part NumberST7M258H300
NSN5330-01-357-8005
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ST7M258H300 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
SUBSTITUTES & CROSS-REFERENCES 2
10116944Reference document
Same NSN cross-reference
Reference document — Informative reference only
600-300Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST7M258H300?
ST7M258H300 is a SEAL,PLAIN.
What parts can replace ST7M258H300?
There are 2 known substitutes for ST7M258H300: 10116944, 600-300. Substitute compatibility should be verified for your specific system.
What is the NSN for ST7M258H300?
ST7M258H300 is cataloged in the U.S. Government catalog under NSN 5330-01-357-8005. This indicates validated use in U.S. government and defense supply chains.
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