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Technical Data Sheet
PartsTable / COMPONENT / 27-54021 1
27-54021 1 ✓ 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. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-503-0322, 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
27-54021 1
NSN: 5330-01-503-0322
FSC: 5330
CAGE: 88907 — BRUNSWICK CORP DBA MERCURY MARINE DIV MERCURY MARINE (USA)
SPECIFICATIONS
Part Number27-54021 1
NSN5330-01-503-0322
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 27-54021 1 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
177781DInterchangeable
interchangeable cross-reference
interchangeable
SL5113PC62Interchangeable
interchangeable cross-reference
interchangeable
SL4742PC59Interchangeable
interchangeable cross-reference
interchangeable
10338Interchangeable
interchangeable cross-reference
interchangeable
2890-44Interchangeable
interchangeable cross-reference
interchangeable
LT4K026Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 27-54021 1?
27-54021 1 is a GASKET.
What parts can replace 27-54021 1?
There are 10 known substitutes for 27-54021 1: 177781D, SL5113PC62, SL4742PC59 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 27-54021 1?
27-54021 1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-503-0322. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026