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Technical Data Sheet
PartsTable / COMPONENT / 21/2-B
21/2-B ✓ 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 21/2-B 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 5340-01-270-2902, 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
21/2-B
NSN: 5340-01-270-2902
FSC: 5340
CAGE: 76369 — MINERALLAC ELECTRIC CO (USA)
SPECIFICATIONS
Part Number21/2-B
NSN5340-01-270-2902
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21/2-B 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
KEY FEATURES
•
PIPE ACCOMMODATION DIAMETER: 1.250 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
SURFACE TREATMENT: ZINC
•
STYLE DESIGNATOR: SPLIT RING
•
SUPPORTED ITEM AND QUANTITY: 1 CONDUIT
TECHNICAL CHARACTERISTICS (FLIS)
PIPE ACCOMMODATION DIAMETER1.250 INCHES NOMINAL IN
MATERIALSTEEL
SURFACE TREATMENTZINC
STYLE DESIGNATORSPLIT RING
SUPPORTED ITEM AND QUANTITY1 CONDUIT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
101028PC99T0101Upgraded Successor
successor cross-reference
successor
116627PC99T0101Upgraded Successor
successor cross-reference
successor
10742PC99T0101Upgraded Successor
successor cross-reference
successor
8212B1Interchangeable
interchangeable cross-reference
interchangeable
212BInterchangeable
interchangeable cross-reference
interchangeable
MODEL 2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21/2-B?
21/2-B is a 21/2-B.
What parts can replace 21/2-B?
There are 11 known substitutes for 21/2-B: 101028PC99T0101, 116627PC99T0101, 10742PC99T0101 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21/2-B?
21/2-B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-270-2902. 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