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685763 — SEAL,NONMETALLIC SPECIAL SHAPED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

685763: SEAL,NONMETALLIC SPECIAL SHAPED.

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include material: RUBBER CHLOROPRENE CLASS CR OVERALL, construction: SOLIDSOLID, special_features: COLOR BLACKCOLOR BLACK, fabrication_method: SOLIDSOLID, cross-sectional_width: 0.459 INCHES MINIMUM AND 0.459 INCHES MINIMUM AND 0.521 INCHES MAXIMUM0.521 INCHES MAXIMUM IN, cross-sectional_height: 0.418 INCHES MINIMUM AND 0.418 INCHES MINIMUM AND 0.462 INCHES MAXIMUM0.462 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-733-9078, 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
685763
NSN: 5330-00-733-9078
NIINs: 007339078, 011260693
FSC: 5330 — Packing and Gasket Materials
CAGE: 53800 — SEARS, ROEBUCK AND CO. DBA SEARS DIV SEARS COMMERCIAL (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR OVERALL
constructionSOLIDSOLID
special_featuresCOLOR BLACKCOLOR BLACK
fabrication_methodSOLIDSOLID
cross-sectional_width0.459 INCHES MINIMUM AND 0.459 INCHES MINIMUM AND 0.521 INCHES MAXIMUM0.521 INCHES MAXIMUM IN
cross-sectional_height0.418 INCHES MINIMUM AND 0.418 INCHES MINIMUM AND 0.462 INCHES MAXIMUM0.462 INCHES MAXIMUM IN
cross-sectional_thickness0.055 INCHES NOMINAL0.055 INCHES NOMINAL IN
NSN5330-00-733-9078
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 685763 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
SUBSTITUTES & CROSS-REFERENCES 1
234800Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 685763?
685763 is a SEAL,NONMETALLIC SPECIAL SHAPED.
What parts can replace 685763?
There is 1 known substitute for 685763: 234800. Substitute compatibility should be verified for your specific system.
What is the NSN for 685763?
685763 is cataloged in the U.S. Government catalog under NSN 5330-00-733-9078. 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.