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ST7M258-550 — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

ST7M258-550: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE CLASS Q AND GLASS OVERALL, temp_rating: -65.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF, peripheral_diameter: 6.100 INCHES NOMINAL IN, center_hole_diameter: 5.470 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN, cross-sectional_height: 0.225 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN, cross-sectional_shape_style: OVAL. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-354-5538, 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
ST7M258-550
NSN: 5330-00-354-5538
FSC: 5330 — Packing and Gasket Materials
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q AND GLASS OVERALL
temp_rating-65.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF
peripheral_diameter6.100 INCHES NOMINAL IN
center_hole_diameter5.470 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
cross-sectional_height0.225 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
cross-sectional_shape_styleOVAL
NSN5330-00-354-5538
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ST7M258-550 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
•
TEMP RATING: -65.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.225 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: OVAL
•
PERIPHERAL DIAMETER: 6.100 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 5.470 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SILICONE CLASS Q AND GLASS OVERALL
TECHNICAL CHARACTERISTICS
TEMP RATING-65.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.225 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLEOVAL
PERIPHERAL DIAMETER6.100 INCHES NOMINAL IN
CENTER HOLE DIAMETER5.470 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
MATERIALRUBBER SILICONE CLASS Q AND GLASS OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST7M258-550?
ST7M258-550 is a PACKING,PREFORMED.
What is the NSN for ST7M258-550?
ST7M258-550 is cataloged in the U.S. Government catalog under NSN 5330-00-354-5538. This indicates validated use in U.S. government and defense supply chains.
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