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Technical Data Sheet
12.5B ✓ 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 12.5B is a the manufacturer industrial component. Key specifications include Drive Bays: 1x 2.5" SFF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-152-6087, 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
12.5B
NSN: 5330-01-152-6087
FSC: 5330
CAGE: 61260 — MTH TOOL COMPANY INC. DBA MTH PUMPS (USA)
SPECIFICATIONS
Drive Bays1x 2.5" SFF
NSN5330-01-152-6087
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12.5B 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 10
121AInterchangeable
interchangeable cross-reference
interchangeable
ME295UInterchangeable
interchangeable cross-reference
interchangeable
125BInterchangeable
interchangeable cross-reference
interchangeable
AR1Interchangeable
interchangeable cross-reference
interchangeable
1179Interchangeable
interchangeable cross-reference
interchangeable
2159A16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12.5B?
12.5B is a 12.5B.
What parts can replace 12.5B?
There are 10 known substitutes for 12.5B: 121A, ME295U, 125B and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12.5B?
12.5B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-152-6087. This indicates validated use in U.S. government and defense supply chains.
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