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2-021 S3018-70B — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2-021 S3018-70B: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include material: PLASTIC SILICONE, temp_rating: 260.0 CELSIUS DEGC, hardness_rating: 70.0 PLASTOMETER SCALE NOMINAL, center_hole_diameter: 0.926 INCHES NOMINAL IN, cross-sectional_height: 0.070 INCHES NOMINAL IN, end_item_identification: MODEL 350 OPTICAL LOOP. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-600-1278, 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
2-021 S3018-70B
NSN: 5331-01-600-1278
FSC: 5331 — O-ring
CAGE: 02697 — PARKER-HANNIFIN CORP DIV O-RING DIVISION (USA)
SPECIFICATIONS
materialPLASTIC SILICONE
temp_rating260.0 CELSIUS DEGC
hardness_rating70.0 PLASTOMETER SCALE NOMINAL
center_hole_diameter0.926 INCHES NOMINAL IN
cross-sectional_height0.070 INCHES NOMINAL IN
end_item_identificationMODEL 350 OPTICAL LOOP
NSN5331-01-600-1278
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2-021 S3018-70B 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: 260.0 CELSIUS DEGC
•
CROSS-SECTIONAL HEIGHT: 0.070 INCHES NOMINAL IN
•
HARDNESS RATING: 70.0 PLASTOMETER SCALE NOMINAL
•
CENTER HOLE DIAMETER: 0.926 INCHES NOMINAL IN
•
MATERIAL: PLASTIC SILICONE
TECHNICAL CHARACTERISTICS
TEMP RATING260.0 CELSIUS DEGC
CROSS-SECTIONAL HEIGHT0.070 INCHES NOMINAL IN
HARDNESS RATING70.0 PLASTOMETER SCALE NOMINAL
CENTER HOLE DIAMETER0.926 INCHES NOMINAL IN
END ITEM IDENTIFICATIONMODEL 350 OPTICAL LOOP
MATERIALPLASTIC SILICONE
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2-021 S3018-70B?
2-021 S3018-70B is a O-RING.
What is the NSN for 2-021 S3018-70B?
2-021 S3018-70B is cataloged in the U.S. Government catalog under NSN 5331-01-600-1278. 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.