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Technical Data Sheet
PartsTable / COMPONENT / 220521-C
220521-C ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The GASKET is a the manufacturer industrial component. Key specifications include material: COPPER AND STEEL AND ASBESTOS OVERALL, hole_diameter: 0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 7.875 INCHES NOMINAL IN, overall_length: 27.875 INCHES NOMINAL IN, special_features: 18 ADDITIONAL HOLES 0.438 IN. DIA AND 4 HOLES 0.500 IN.

DIA IN, cross-sectional_thickness: 0.050 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-024-2186, 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
220521-C
NSN: 5330-00-024-2186
FSC: 5330
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
materialCOPPER AND STEEL AND ASBESTOS OVERALL
hole_diameter0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width7.875 INCHES NOMINAL IN
overall_length27.875 INCHES NOMINAL IN
special_features18 ADDITIONAL HOLES 0.438 IN. DIA AND 4 HOLES 0.500 IN. DIA IN
cross-sectional_thickness0.050 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL WITH SOFT FILLER
NSN5330-00-024-2186
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 220521-C 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 SHAPE STYLE: METAL WITH SOFT FILLER
•
MATERIAL: COPPER AND STEEL AND ASBESTOS OVERALL
•
HOLE DIAMETER: 0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
CROSS-SECTIONAL THICKNESS: 0.050 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEMETAL WITH SOFT FILLER
SPECIAL FEATURES18 ADDITIONAL HOLES 0.438 IN. DIA AND 4 HOLES 0.500 IN. DIA IN
MATERIALCOPPER AND STEEL AND ASBESTOS OVERALL
HOLE DIAMETER0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OVERALL LENGTH27.875 INCHES NOMINAL IN
OVERALL WIDTH7.875 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.050 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
3-16969Interchangeable
interchangeable cross-reference
interchangeable
677-0364-010Interchangeable
interchangeable cross-reference
interchangeable
42200Interchangeable
interchangeable cross-reference
interchangeable
42-10365Interchangeable
interchangeable cross-reference
interchangeable
2411 1-9/16Interchangeable
interchangeable cross-reference
interchangeable
110S 1-9/16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 220521-C?
220521-C is a GASKET.
What parts can replace 220521-C?
There are 20 known substitutes for 220521-C: 3-16969, 677-0364-010, 42200 and 17 more. Substitute compatibility should be verified for your specific system.
Is 220521-C still available?
220521-C is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026