PartsTable
Technical Data Sheet
8940B ✓ 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 O-RING 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 5331-01-275-1861, 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
8940B
NSN: 5331-01-275-1861
FSC: 5331 — O-RING
CAGE: 93236 — DRESSER-RAND CO WORTHINGTON COMPRESSOR OPN A JOINT VENTURE (USA)
SPECIFICATIONS
Part Number8940B
NSN5331-01-275-1861
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 8940B 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 4
5253-635Interchangeable
interchangeable cross-reference
interchangeable
276Interchangeable
interchangeable cross-reference
interchangeable
AS568B-008Interchangeable
interchangeable cross-reference
interchangeable
20A11CM008Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8940B?
8940B is a O-RING.
What parts can replace 8940B?
There are 4 known substitutes for 8940B: 5253-635, 276, AS568B-008 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8940B?
8940B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-275-1861. This indicates validated use in U.S. government and defense supply chains.
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