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Technical Data Sheet
B1889 ✓ 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 DISK,VALVE is a the manufacturer industrial component. Key specifications include material: TITANIUM ALLOY, overall_height: 0.500 INCHES NOMINAL IN, outside_diameter: 3.750 INCHES NOMINAL IN, special_features: STEM GUIDE POST ON ONE SIDE, style_designator: SOLID. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-392-7726, 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
B1889
NSN: 5340-00-392-7726
FSC: 5340
CAGE: 80252 — FARADAY LLC (USA)
SPECIFICATIONS
materialTITANIUM ALLOY
overall_height0.500 INCHES NOMINAL IN
outside_diameter3.750 INCHES NOMINAL IN
special_featuresSTEM GUIDE POST ON ONE SIDE
style_designatorSOLID
NSN5340-00-392-7726
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B1889 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
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESTELEPHONE AND TELEGRAPH EQUIPMENT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
D-1866 PC 3 3IN BInterchangeable
interchangeable cross-reference
interchangeable
D1866 PIECE 3 3Interchangeable
interchangeable cross-reference
interchangeable
D-1866 PIECE 3 3IN BInterchangeable
interchangeable cross-reference
interchangeable
BP62969Interchangeable
Same NIIN cross-reference
interchangeable
1887-657Interchangeable
Same NIIN cross-reference
interchangeable
SC-C-108674Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B1889?
B1889 is a DISK,VALVE.
What parts can replace B1889?
There are 6 known substitutes for B1889: D-1866 PC 3 3IN B, D1866 PIECE 3 3, D-1866 PIECE 3 3IN B and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B1889?
B1889 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-392-7726. This indicates validated use in U.S. government and defense supply chains.
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