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PartsTable / COMPONENT / GB528BM1-012
GB528BM1-012 ✓ 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,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OUTER LAYER, corner_shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER, flange_width: 0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN, overall_length: 0.4225 INCHES MINIMUM AND 0.4475 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY, style_designator: SOLID, EXTERNAL FLANGE ONE END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-043-5881, 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
GB528BM1-012
NSN: 3120-01-043-5881
FSC: 3120
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OUTER LAYER
corner_shapeSQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
flange_width0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN
overall_length0.4225 INCHES MINIMUM AND 0.4475 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.7505 INCHES MINIMUM AND 0.7515 INCHES MAXIMUM IN
body_outside_diameter0.9388 INCHES MINIMUM AND 0.9393 INCHES MAXIMUM IN
flange_outside_diameter1.2400 INCHES NOMINAL IN
NSN3120-01-043-5881
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: GB528BM1-012 · 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
KEY FEATURES
•
CORNER SHAPE: SQUARE INSIDE LEFT CORNER
•
MATERIAL: STEEL COMP 630 OUTER LAYER
•
SURFACE FINISH: 16.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE
•
FLANGE WIDTH: 0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPESQUARE INSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
MATERIALSTEEL COMP 630 OUTER LAYER
SURFACE FINISH16.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE
SURFACE FINISH63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPEUNDERCUT LEFT FLANGE BODY CORNER
FLANGE WIDTH0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN
FLANGE OUTSIDE DIAMETER1.2400 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.9388 INCHES MINIMUM AND 0.9393 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
G12Interchangeable
interchangeable cross-reference
interchangeable
910250-12Interchangeable
interchangeable cross-reference
interchangeable
ADF12-102-012Interchangeable
Same NIIN cross-reference
interchangeable
ATF12-102-012Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GB528BM1-012?
GB528BM1-012 is a BEARING,SLEEVE.
What parts can replace GB528BM1-012?
There are 4 known substitutes for GB528BM1-012: G12, 910250-12, ADF12-102-012 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GB528BM1-012?
GB528BM1-012 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-043-5881. 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