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Technical Data Sheet
PartsTable / COMPONENT / 256102-8
256102-8 ✓ 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 TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, corner_shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER, flange_width: 0.3680 INCHES MINIMUM AND 0.3710 INCHES MAXIMUM IN, overall_length: 1.8750 INCHES NOMINAL IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, INTERNAL FLANGE AT BOTH ENDS, body_inside_diameter: 3.0310 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-398-8159, 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
256102-8
NSN: 3120-00-398-8159
FSC: 3120
CAGE: 93232 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS WRIGHT ENGINEERED PUMP DIVISION USE CAGE CODE 0UBG9 FOR CATALOGING (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
corner_shapeSQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
flange_width0.3680 INCHES MINIMUM AND 0.3710 INCHES MAXIMUM IN
overall_length1.8750 INCHES NOMINAL IN
style_designatorSOLID, EXTERNAL FLANGE ONE END, INTERNAL FLANGE AT BOTH ENDS
body_inside_diameter3.0310 INCHES NOMINAL IN
body_outside_diameter4.4960 INCHES MINIMUM AND 4.4980 INCHES MAXIMUM IN
flange_outside_diameter5.0000 INCHES NOMINAL IN
left_internal_flange_width0.5620 INCHES NOMINAL IN
right_internal_flange_width0.8125 INCHES NOMINAL IN
left_internal_flange_hole_diameter3.6250 INCHES NOMINAL IN
right_internal_flange_hole_diameter4.0000 INCHES NOMINAL IN
NSN3120-00-398-8159
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 256102-8 · 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
•
FLANGE OUTSIDE DIAMETER: 5.0000 INCHES NOMINAL IN
•
LEFT INTERNAL FLANGE WIDTH: 0.5620 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 4.4960 INCHES MINIMUM AND 4.4980 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 3.0310 INCHES NOMINAL IN
•
RIGHT INTERNAL FLANGE HOLE DIAMETER: 4.0000 INCHES NOMINAL IN
•
RIGHT INTERNAL FLANGE WIDTH: 0.8125 INCHES NOMINAL IN
•
LEFT INTERNAL FLANGE HOLE DIAMETER: 3.6250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE OUTSIDE DIAMETER5.0000 INCHES NOMINAL IN
LEFT INTERNAL FLANGE WIDTH0.5620 INCHES NOMINAL IN
OVERALL LENGTH1.8750 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER4.4960 INCHES MINIMUM AND 4.4980 INCHES MAXIMUM IN
BODY INSIDE DIAMETER3.0310 INCHES NOMINAL IN
RIGHT INTERNAL FLANGE HOLE DIAMETER4.0000 INCHES NOMINAL IN
RIGHT INTERNAL FLANGE WIDTH0.8125 INCHES NOMINAL IN
LEFT INTERNAL FLANGE HOLE DIAMETER3.6250 INCHES NOMINAL IN
FLANGE WIDTH0.3680 INCHES MINIMUM AND 0.3710 INCHES MAXIMUM IN
CORNER SHAPESQUARE INSIDE RIGHT CORNER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
40784Interchangeable
interchangeable cross-reference
interchangeable
6061-621Interchangeable
interchangeable cross-reference
interchangeable
1097DInterchangeable
interchangeable cross-reference
interchangeable
09631305-1Interchangeable
interchangeable cross-reference
interchangeable
L40784Interchangeable
interchangeable cross-reference
interchangeable
240784Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 256102-8?
256102-8 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace 256102-8?
There are 13 known substitutes for 256102-8: 40784, 6061-621, 1097D and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 256102-8?
256102-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-398-8159. 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