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Technical Data Sheet
PartsTable / COMPONENT / 12978-G
12978-G ✓ 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 BEARING,WASHER,THRUST is a the manufacturer industrial component. Key specifications include fastener_length: 1.000 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, surface_treatment: CADMIUM OVERALL, nominal_thread_diameter: 0.188 INCHES IN, part_name_assigned_by_controlling_agency: BOLT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-341-6870, 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
12978-G
NSN: 3120-01-341-6870
FSC: 3120
CAGE: 0EJ14 — DP MANUFACTURING INC. (USA)
SPECIFICATIONS
fastener_length1.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
nominal_thread_diameter0.188 INCHES IN
part_name_assigned_by_controlling_agencyBOLT
NSN3120-01-341-6870
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 12978-G · 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
12-078Interchangeable
interchangeable cross-reference
interchangeable
12-978Interchangeable
interchangeable cross-reference
interchangeable
E-121-DInterchangeable
interchangeable cross-reference
interchangeable
6-10-Q-M-DCInterchangeable
interchangeable cross-reference
interchangeable
SE-3-M-DCInterchangeable
interchangeable cross-reference
interchangeable
401148Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12978-G?
12978-G is a BEARING,WASHER,THRUST.
What parts can replace 12978-G?
There are 8 known substitutes for 12978-G: 12-078, 12-978, E-121-D and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12978-G?
12978-G is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-341-6870. 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