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4D0591 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4D0591: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, case_style: SQUARE, seal_width: 0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN, sealing_element_style: ANGULAR-OPPOSED, accommodated_shaft_diameter: 0.719 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-084-7551, 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
4D0591
NSN: 5330-00-084-7551
FSC: 5330 — Packing and Gasket Materials
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
case_styleSQUARE
seal_width0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
sealing_element_styleANGULAR-OPPOSED
accommodated_shaft_diameter0.719 INCHES NOMINAL IN
NSN5330-00-084-7551
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4D0591 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: 0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
•
SEALING ELEMENT STYLE: ANGULAR-OPPOSED
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 0.719 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS
SEAL WIDTH0.328 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN
SEALING ELEMENT STYLEANGULAR-OPPOSED
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER0.719 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
4D591Reference document
Same NSN cross-reference
Reference document — Secondary reference
516215Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 4D0591?
4D0591 is a SEAL,PLAIN ENCASED.
What parts can replace 4D0591?
There are 2 known substitutes for 4D0591: 4D591, 516215. Substitute compatibility should be verified for your specific system.
What is the NSN for 4D0591?
4D0591 is cataloged in the U.S. Government catalog under NSN 5330-00-084-7551. This indicates validated use in U.S. government and defense supply chains.
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