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CW-287-1 — SEAL,NONMETALLIC SPECIAL SHAPED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

CW-287-1: SEAL,NONMETALLIC SPECIAL SHAPED.

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include material: RUBBER SYNTHETIC OVERALL, construction: SOLID, style_designator: CIRCULAR, aperture_diameter: 34.800 INCHES NOMINAL IN, attachment_method: ROUND HOLE, fabrication_method: SOLID. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-269-0834, 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
CW-287-1
NSN: 5330-00-269-0834
FSC: 5330 — Packing and Gasket Materials
CAGE: 09257 — TRELLEBORG SEALING SOLUTIONS US, INC. (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
constructionSOLID
style_designatorCIRCULAR
aperture_diameter34.800 INCHES NOMINAL IN
attachment_methodROUND HOLE
fabrication_methodSOLID
attachment_hole_diameter0.250 INCHES NOMINAL IN
attachment_feature_quantity40
NSN5330-00-269-0834
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: CW-287-1 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
•
ATTACHMENT HOLE DIAMETER: 0.250 INCHES NOMINAL IN
•
ATTACHMENT FEATURE QUANTITY: 40
•
STYLE DESIGNATOR: CIRCULAR
•
APERTURE DIAMETER: 34.800 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
FABRICATION METHOD: SOLID
•
CONSTRUCTION: SOLID
•
ATTACHMENT METHOD: ROUND HOLE
TECHNICAL CHARACTERISTICS
ATTACHMENT HOLE DIAMETER0.250 INCHES NOMINAL IN
ATTACHMENT FEATURE QUANTITY40
STYLE DESIGNATORCIRCULAR
APERTURE DIAMETER34.800 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC OVERALL
FABRICATION METHODSOLID
CONSTRUCTIONSOLID
ATTACHMENT METHODROUND HOLE
SUBSTITUTES & CROSS-REFERENCES 2
6857-201Reference document
Same NSN cross-reference
Reference document — Secondary reference
C7507-1Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is CW-287-1?
CW-287-1 is a SEAL,NONMETALLIC SPECIAL SHAPED.
What parts can replace CW-287-1?
There are 2 known substitutes for CW-287-1: 6857-201, C7507-1. Substitute compatibility should be verified for your specific system.
What is the NSN for CW-287-1?
CW-287-1 is cataloged in the U.S. Government catalog under NSN 5330-00-269-0834. 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.