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PartsTable / COMPONENT / 303A478REVAPT1
303A478REVAPT1 ✓ 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: COPPER ALLOY OR IRON COMP B OVERALL, corner_shape: SQUARE LEFT FLANGE BODY CORNER, flange_width: 0.0600 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM IN, overall_length: 0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN, hardness_rating: 30.0 ROCKWELL C MINIMUM AND 70.0 ROCKWELL C MAXIMUM OVERALL, style_designator: SOLID, EXTERNAL FLANGE ONE END. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-425-2232, 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
303A478REVAPT1
NSN: 3120-00-425-2232
FSC: 3120
CAGE: 24446 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialCOPPER ALLOY OR IRON COMP B OVERALL
corner_shapeSQUARE LEFT FLANGE BODY CORNER
flange_width0.0600 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM IN
overall_length0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 70.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.2490 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
body_outside_diameter0.3760 INCHES MINIMUM AND 0.3770 INCHES MAXIMUM IN
flange_outside_diameter0.4663 INCHES MINIMUM AND 0.4713 INCHES MAXIMUM IN
material_document_and_classificationMIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
NSN3120-00-425-2232
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 303A478REVAPT1 · 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
•
STYLE DESIGNATOR: SOLID, EXTERNAL FLANGE ONE END
•
BODY OUTSIDE DIAMETER: 0.3760 INCHES MINIMUM AND 0.3770 INCHES MAXIMUM IN
•
HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 70.0 ROCKWELL C MAXIMUM OVERALL
•
FLANGE WIDTH: 0.0600 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM IN
•
FLANGE OUTSIDE DIAMETER: 0.4663 INCHES MINIMUM AND 0.4713 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
•
MATERIAL: OIL LUBRICATING LUBRICATION
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
BODY OUTSIDE DIAMETER0.3760 INCHES MINIMUM AND 0.3770 INCHES MAXIMUM IN
HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 70.0 ROCKWELL C MAXIMUM OVERALL
FLANGE WIDTH0.0600 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM IN
FLANGE OUTSIDE DIAMETER0.4663 INCHES MINIMUM AND 0.4713 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
MATERIALOIL LUBRICATING LUBRICATION
CORNER SHAPESQUARE INSIDE RIGHT CORNER
OVERALL LENGTH0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
31-00119Interchangeable
interchangeable cross-reference
interchangeable
11-320Interchangeable
interchangeable cross-reference
interchangeable
202122Interchangeable
interchangeable cross-reference
interchangeable
011320Interchangeable
interchangeable cross-reference
interchangeable
DV175-2KInterchangeable
interchangeable cross-reference
interchangeable
F3102Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 303A478REVAPT1?
303A478REVAPT1 is a BEARING,SLEEVE.
What parts can replace 303A478REVAPT1?
There are 22 known substitutes for 303A478REVAPT1: 31-00119, 11-320, 202122 and 19 more. Substitute compatibility should be verified for your specific system.
Is 303A478REVAPT1 still available?
303A478REVAPT1 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026