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Technical Data Sheet
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9258B — O-RING

✓ Government record, cited
ZURU · ORING SEAL
PRODUCT OVERVIEW

9258B: O-RING.

Rainbocorns Eggzania Surprise Mania (Unicorn) ZURU Crack into all-new Rainbocorns Eggzania! This egg is oozing with over 20 surprises and brand new kooky cute Rainbocorns characters. Remove the egg from the nest to hatch your super-squishy Rainbocorns Eggzania plush!

There are 6 Eggzania animals to collect including Roary the Lion, Peanut the Elephant and Daffy the Flamingo! Each Eggzania plush comes complete with matching yolkie, 5 mini eggs, stickers, wearable accessories, and an Eggzania joke that will crack you up (if you get the yolk)! Enter Rainboville in style with a ring, stamp and DIY bracelet that match your Eggzania!

These silky soft Rainbocorns love to cuddle and will have you seeing life sunny side up! Which Eggzania will you hatch? This part is cataloged in the U.S.

Government catalog under NSN 5331-01-276-8444, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
9258B
NSN: 5331-01-276-8444
FSC: 5331 — O-ring
CAGE: 830Q4 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS-WRIGHT STEAM AND AIR SOLUTIONS DIV STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
Part Number9258B
ManufacturerZURU
NSN5331-01-276-8444
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 9258B MFR: ZURU ⚠ 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
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9258B?
9258B is a O-RING manufactured by ZURU.
What is the NSN for 9258B?
9258B is cataloged in the U.S. Government catalog under NSN 5331-01-276-8444. 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.