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4D8621 NON-ASBESTOS — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4D8621 NON-ASBESTOS: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include hole_diameter: 0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 4.500 INCHES NOMINAL IN, aperture_width: 3.510 INCHES NOMINAL IN, overall_length: 5.010 INCHES NOMINAL IN, aperture_length: 4.010 INCHES NOMINAL IN, style_designator: NON-CIRCULAR. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-573-4381, 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
4D8621 NON-ASBESTOS
NSN: 5330-01-573-4381
FSC: 5330 — Packing and Gasket Materials
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
hole_diameter0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width4.500 INCHES NOMINAL IN
aperture_width3.510 INCHES NOMINAL IN
overall_length5.010 INCHES NOMINAL IN
aperture_length4.010 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
bolt_hole_quantity4
inside_corner_radius0.500 INCHES NOMINAL IN
outside_corner_radius0.380 INCHES NOMINAL IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
center_to_center_distance_between_bolt_holes_along_width3.750 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
NSN5330-01-573-4381
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4D8621 NON-ASBESTOS 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
•
CROSS-SECTIONAL THICKNESS: 0.031 INCHES NOMINAL IN
•
INSIDE CORNER RADIUS: 0.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
APERTURE WIDTH: 3.510 INCHES NOMINAL IN
•
APERTURE LENGTH: 4.010 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
INSIDE CORNER RADIUS0.500 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
OVERALL LENGTH5.010 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH4.500 INCHES NOMINAL IN
APERTURE WIDTH3.510 INCHES NOMINAL IN
APERTURE LENGTH4.010 INCHES NOMINAL IN
BOLT HOLE QUANTITY4
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH4.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
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 4D8621 NON-ASBESTOS?
4D8621 NON-ASBESTOS is a GASKET.
What is the NSN for 4D8621 NON-ASBESTOS?
4D8621 NON-ASBESTOS is cataloged in the U.S. Government catalog under NSN 5330-01-573-4381. 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.