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Technical Data Sheet
B10421Q ✓ 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 ASSEMBLY 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 5330-01-323-4743, 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
B10421Q
NSN: 5330-01-323-4743
FSC: 5330
CAGE: 51064 — ROBBINS AND MYERS INC (USA)
SPECIFICATIONS
Part NumberB10421Q
NSN5330-01-323-4743
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B10421Q 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 3
5206138Interchangeable
interchangeable cross-reference
interchangeable
ASC1557944Interchangeable
interchangeable cross-reference
interchangeable
B10-421Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B10421Q?
B10421Q is a PACKING ASSEMBLY.
What parts can replace B10421Q?
There are 3 known substitutes for B10421Q: 5206138, ASC1557944, B10-421. Substitute compatibility should be verified for your specific system.
What is the NSN for B10421Q?
B10421Q is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-323-4743. This indicates validated use in U.S. government and defense supply chains.
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