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BB129 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The RECTIFIER,SEMICONDUCTOR DEVICE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 0.5000 INCHES NOMINAL IN, overall_width: 0.5000 INCHES NOMINAL IN, alignment_type: RIGID, surface_finish: GROUND, special_features: OIL HOLE IN OUTER RACE,EXTRA-CAPACITY OUTER RACE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-097-8978, 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
BB129
NSN: 3120-00-097-8978
FSC: 3120
CAGE: 24047 — COOPER INDUSTRIES INC DBA COOPER TOOLS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter0.5000 INCHES NOMINAL IN
overall_width0.5000 INCHES NOMINAL IN
alignment_typeRIGID
surface_finishGROUND
special_featuresOIL HOLE IN OUTER RACE,EXTRA-CAPACITY OUTER RACE
style_designatorNON-SEPARABLE, OPEN END, DRAWN SHELL
end_item_identificationLOGISTICS SUPPORT VESSEL (LSV)
overall_outside_diameter0.6875 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
NSN3120-00-097-8978
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: BB129 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
B129Interchangeable
interchangeable cross-reference
interchangeable
1F4622Interchangeable
interchangeable cross-reference
interchangeable
354080Interchangeable
interchangeable cross-reference
interchangeable
942532Interchangeable
interchangeable cross-reference
interchangeable
B129D1043Interchangeable
interchangeable cross-reference
interchangeable
GGG-C-116Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BB129?
BB129 is a RECTIFIER,SEMICONDUCTOR DEVICE.
What parts can replace BB129?
There are 8 known substitutes for BB129: B129, 1F4622, 354080 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BB129?
BB129 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-097-8978. 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