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4DP20818PC16 1-2IN — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4DP20818PC16 1-2IN: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: ASBESTOS OVERALL, joint_type: SCARF-PERIPHERAL OVERALL, peripheral_diameter: 0.640 INCHES NOMINAL IN, center_hole_diameter: 0.437 INCHES NOMINAL IN, cross-sectional_height: 0.212 INCHES NOMINAL IN, cross-sectional_shape_style: SQUARE/RECTANGULAR. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-679-6022, 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
4DP20818PC16 1-2IN
NSN: 5330-00-679-6022
FSC: 5330 — Packing and Gasket Materials
CAGE: 63686 — THE WALWORTH COMPANY (USA)
SPECIFICATIONS
materialASBESTOS OVERALL
joint_typeSCARF-PERIPHERAL OVERALL
peripheral_diameter0.640 INCHES NOMINAL IN
center_hole_diameter0.437 INCHES NOMINAL IN
cross-sectional_height0.212 INCHES NOMINAL IN
cross-sectional_shape_styleSQUARE/RECTANGULAR
NSN5330-00-679-6022
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4DP20818PC16 1-2IN 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 HEIGHT: 0.212 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE/RECTANGULAR
•
PERIPHERAL DIAMETER: 0.640 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.437 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS OVERALL
•
JOINT TYPE: SCARF-PERIPHERAL OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.212 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR
PERIPHERAL DIAMETER0.640 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.437 INCHES NOMINAL IN
MATERIALASBESTOS OVERALL
JOINT TYPESCARF-PERIPHERAL OVERALL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 4DP20818PC16 1-2IN?
4DP20818PC16 1-2IN is a PACKING,PREFORMED.
What is the NSN for 4DP20818PC16 1-2IN?
4DP20818PC16 1-2IN is cataloged in the U.S. Government catalog under NSN 5330-00-679-6022. 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.