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6558-253 — SEAL,NONMETALLIC SPECIAL SHAPED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6558-253: SEAL,NONMETALLIC SPECIAL SHAPED.

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include construction: TWO-PIECE, special_features: ANY ACCEPTABLE MATERIAL, style_designator: CIRCULAR, aperture_diameter: 3.405 INCHES NOMINAL IN, attachment_method: CEMENTED, fabrication_method: SOLID. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-050-4269, 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
6558-253
NSN: 5330-01-050-4269
FSC: 5330 — Packing and Gasket Materials
CAGE: 11871 — RECON/OPTICAL, INC. (USA)
SPECIFICATIONS
constructionTWO-PIECE
special_featuresANY ACCEPTABLE MATERIAL
style_designatorCIRCULAR
aperture_diameter3.405 INCHES NOMINAL IN
attachment_methodCEMENTED
fabrication_methodSOLID
NSN5330-01-050-4269
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6558-253 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
•
STYLE DESIGNATOR: CIRCULAR
•
APERTURE DIAMETER: 3.405 INCHES NOMINAL IN
•
FABRICATION METHOD: SOLID
•
CONSTRUCTION: TWO-PIECE
•
ATTACHMENT METHOD: CEMENTED
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORCIRCULAR
APERTURE DIAMETER3.405 INCHES NOMINAL IN
SPECIAL FEATURESANY ACCEPTABLE MATERIAL
FABRICATION METHODSOLID
CONSTRUCTIONTWO-PIECE
ATTACHMENT METHODCEMENTED
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 1
12266630Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6558-253?
6558-253 is a SEAL,NONMETALLIC SPECIAL SHAPED.
What parts can replace 6558-253?
There is 1 known substitute for 6558-253: 12266630. Substitute compatibility should be verified for your specific system.
What is the NSN for 6558-253?
6558-253 is cataloged in the U.S. Government catalog under NSN 5330-01-050-4269. 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.