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JC4256 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

JC4256: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: STEEL, overall_height: 0.828 INCHES NOMINAL IN, inside_chamfer_depth: 0.625 INCHES NOMINAL IN, outside_chamfer_depth: 0.766 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-244-8564, 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
JC4256
NSN: 5340-01-244-8564
FSC: 5340 — Hardware, Commercial
CAGE: 2Y614 — LINK-BELT CRANES, L.P., LLLP (USA)
SPECIFICATIONS
materialSTEEL
overall_height0.828 INCHES NOMINAL IN
inside_chamfer_depth0.625 INCHES NOMINAL IN
outside_chamfer_depth0.766 INCHES NOMINAL IN
NSN5340-01-244-8564
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: JC4256 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
•
INSIDE CHAMFER DEPTH: 0.625 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
OUTSIDE CHAMFER DEPTH: 0.766 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.828 INCHES NOMINAL IN
INSIDE CHAMFER DEPTH0.625 INCHES NOMINAL IN
MATERIALSTEEL
OUTSIDE CHAMFER DEPTH0.766 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
JC4256-AReference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 JC4256?
JC4256 is a RETAINER,HELICAL COMPRESSION SPR.
What parts can replace JC4256?
There is 1 known substitute for JC4256: JC4256-A. Substitute compatibility should be verified for your specific system.
What is the NSN for JC4256?
JC4256 is cataloged in the U.S. Government catalog under NSN 5340-01-244-8564. 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.