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Technical Data Sheet
PartsTable / COMPONENT / A345776
A345776 ✓ 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: OIL LUBRICATING LUBRICATION, corner_shape: SQUARE ALL CORNERS, overall_length: 1.0000 INCHES NOMINAL IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 0.5015 INCHES MINIMUM AND 0.5025 INCHES MAXIMUM IN, body_outside_diameter: 0.6880 INCHES MINIMUM AND 0.6890 INCHES MAXIMUM 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 3120-00-534-5776, 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
A345776
NSN: 3120-00-534-5776
FSC: 3120
CAGE: 00000
SPECIFICATIONS
materialOIL LUBRICATING LUBRICATION
corner_shapeSQUARE ALL CORNERS
overall_length1.0000 INCHES NOMINAL IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter0.5015 INCHES MINIMUM AND 0.5025 INCHES MAXIMUM IN
body_outside_diameter0.6880 INCHES MINIMUM AND 0.6890 INCHES MAXIMUM IN
nondefinitive_spec/std_data1 TYPE AND A COMPOSITION AND B COMPOSITION
material_document_and_classificationMIL-B-5687,TY 1,COMP A OR B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3120-00-534-5776
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: A345776 · 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 ALL CORNERS
•
MATERIAL: COPPER ALLOY OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-5687,TY 1,COMP A OR B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BODY OUTSIDE DIAMETER: 0.6880 INCHES MINIMUM AND 0.6890 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 0.5015 INCHES MINIMUM AND 0.5025 INCHES MAXIMUM IN
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A COMPOSITION AND B COMPOSITION
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPESQUARE ALL CORNERS
MATERIALCOPPER ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-5687,TY 1,COMP A OR B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
BODY OUTSIDE DIAMETER0.6880 INCHES MINIMUM AND 0.6890 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.5015 INCHES MINIMUM AND 0.5025 INCHES MAXIMUM IN
MATERIALOIL LUBRICATING LUBRICATION
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A COMPOSITION AND B COMPOSITION
OVERALL LENGTH1.0000 INCHES NOMINAL IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-L-11734 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
MILB5687TYPE1C0MP0SITI0NAInterchangeable
interchangeable cross-reference
interchangeable
5226513Interchangeable
interchangeable cross-reference
interchangeable
MILB5687TYPE1C0MP0SITI0NBInterchangeable
interchangeable cross-reference
interchangeable
03-047-399Interchangeable
interchangeable cross-reference
interchangeable
A418-3Interchangeable
interchangeable cross-reference
interchangeable
GAA12565Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A345776?
A345776 is a BEARING,SLEEVE.
What parts can replace A345776?
There are 18 known substitutes for A345776: MILB5687TYPE1C0MP0SITI0NA, 5226513, MILB5687TYPE1C0MP0SITI0NB and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A345776?
A345776 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-534-5776. 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