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B540ZZ ST12 — BEARING,BALL,AIRFRAME

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

B540ZZ ST12: BEARING,BALL,AIRFRAME.

The BEARING,BALL,AIRFRAME is a the manufacturer industrial component. This part is cataloged in the U.S. Government catalog under NSN 3110-01-184-5434, 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
B540ZZ ST12
NSN: 3110-01-184-5434
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 38443 — SKF USA INC. (USA)
SPECIFICATIONS
Part NumberB540ZZ ST12
NSN3110-01-184-5434
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B540ZZ ST12 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 2
A540DDE8510Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
BACB10A539Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B540ZZ ST12?
B540ZZ ST12 is a BEARING,BALL,AIRFRAME.
What parts can replace B540ZZ ST12?
There are 2 known substitutes for B540ZZ ST12: A540DDE8510, BACB10A539. Substitute compatibility should be verified for your specific system.
What is the NSN for B540ZZ ST12?
B540ZZ ST12 is cataloged in the U.S. Government catalog under NSN 3110-01-184-5434. This indicates validated use in U.S. government and defense supply chains.
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