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4256500 — SEAL,PLAIN

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4256500: SEAL,PLAIN.

The SEAL,PLAIN is a the manufacturer industrial component. Key specifications include seal_width: 7.0 MILLIMETERS NOMINAL MM, construction: ONE-PIECE, outside_diameter: 42.0 MILLIMETERS NOMINAL MM, special_features: FIRST STEP INSIDE DIAMETER: 37.5 MILLIMETERS NOMINAL;SECOND STEP INSIDE DIAMETER: 30.6 MILLIMETERS NOMINAL MM, end_item_identification: 4210-01-622-0440;TRUCK,FIRE FIGHTING, accommodated_shaft_diameter: 25.0 MILLIMETERS NOMINAL MM. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-656-3983, 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
4256500
NSN: 5330-01-656-3983
FSC: 5330 — Packing and Gasket Materials
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
seal_width7.0 MILLIMETERS NOMINAL MM
constructionONE-PIECE
outside_diameter42.0 MILLIMETERS NOMINAL MM
special_featuresFIRST STEP INSIDE DIAMETER: 37.5 MILLIMETERS NOMINAL;SECOND STEP INSIDE DIAMETER: 30.6 MILLIMETERS NOMINAL MM
end_item_identification4210-01-622-0440;TRUCK,FIRE FIGHTING
accommodated_shaft_diameter25.0 MILLIMETERS NOMINAL MM
part_name_assigned_by_controlling_agencySEAL,SHAFT
NSN5330-01-656-3983
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4256500 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
•
SEAL WIDTH: 7.0 MILLIMETERS NOMINAL MM
•
OUTSIDE DIAMETER: 42.0 MILLIMETERS NOMINAL MM
•
ACCOMMODATED SHAFT DIAMETER: 25.0 MILLIMETERS NOMINAL MM
•
CONSTRUCTION: ONE-PIECE
TECHNICAL CHARACTERISTICS
SEAL WIDTH7.0 MILLIMETERS NOMINAL MM
OUTSIDE DIAMETER42.0 MILLIMETERS NOMINAL MM
SPECIAL FEATURESFIRST STEP INSIDE DIAMETER: 37.5 MILLIMETERS NOMINAL;SECOND STEP INSIDE DIAMETER: 30.6 MILLIMETERS NOMINAL MM
ACCOMMODATED SHAFT DIAMETER25.0 MILLIMETERS NOMINAL MM
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL,SHAFT
END ITEM IDENTIFICATION4210-01-622-0440;TRUCK,FIRE FIGHTING
CONSTRUCTIONONE-PIECE
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

No substitute or cross-reference records for this part.

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 4256500?
4256500 is a SEAL,PLAIN.
What is the NSN for 4256500?
4256500 is cataloged in the U.S. Government catalog under NSN 5330-01-656-3983. This indicates validated use in U.S. government and defense supply chains.
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