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Technical Data Sheet
PartsTable / COMPONENT / S8057BF20
S8057BF20 ✓ 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 PACKING,PREFORMED is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-291-3307, 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
S8057BF20
NSN: 5330-00-291-3307
FSC: 5330
CAGE: 72599 — ALLIEDSIGNAL INC DBA ALLIED-SIGNAL AEROSPACE CO (USA)
SPECIFICATIONS
Part NumberS8057BF20
NSN5330-00-291-3307
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S8057BF20 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 24
163-78Interchangeable
interchangeable cross-reference
interchangeable
H260K203Interchangeable
interchangeable cross-reference
interchangeable
10433Interchangeable
interchangeable cross-reference
interchangeable
182020Interchangeable
interchangeable cross-reference
interchangeable
WO-182020Interchangeable
interchangeable cross-reference
interchangeable
182020AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S8057BF20?
S8057BF20 is a PACKING,PREFORMED.
What parts can replace S8057BF20?
There are 24 known substitutes for S8057BF20: 163-78, H260K203, 10433 and 21 more. Substitute compatibility should be verified for your specific system.
Is S8057BF20 still available?
S8057BF20 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