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509E821AFPN81 — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

509E821AFPN81: GASKET.

The GASKET is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 5330-01-415-1963, 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
509E821AFPN81
NSN: 5330-01-415-1963
FSC: 5330 — Packing and Gasket Materials
CAGE: 03502 — GENERAL ELECTRIC CO NAVAL AND DRIVE TURBINE SYSTEMS DEPT (USA)
SPECIFICATIONS
Part Number509E821AFPN81
NSN5330-01-415-1963
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 509E821AFPN81 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
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 2
101A362AA-85Reference document
Same NSN cross-reference
Reference document — Secondary reference
101A362DD-85Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 509E821AFPN81?
509E821AFPN81 is a GASKET.
What parts can replace 509E821AFPN81?
There are 2 known substitutes for 509E821AFPN81: 101A362AA-85, 101A362DD-85. Substitute compatibility should be verified for your specific system.
What is the NSN for 509E821AFPN81?
509E821AFPN81 is cataloged in the U.S. Government catalog under NSN 5330-01-415-1963. 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.