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PartsTable / COMPONENT / HSPR56-90MD
HSPR56-90MD ✓ 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: PLASTIC INNER LAYER, overall_length: 2.8070 INCHES MINIMUM AND 2.8170 INCHES MAXIMUM IN, body_inside_diameter: 3.5000 INCHES MINIMUM AND 3.5020 INCHES MAXIMUM IN, body_outside_diameter: 4.2310 INCHES MINIMUM AND 4.2410 INCHES MAXIMUM IN, material_document_and_classification: QQ-A-225-9 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-200-11 FED SPEC SINGLE MATERIAL RESPONSE OUTER LAYER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-305-3551, 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
HSPR56-90MD
NSN: 3120-00-305-3551
FSC: 3120
CAGE: 73134 — ROLLER BEARING COMPANY OF AMERICA, INC. (USA)
SPECIFICATIONS
materialPLASTIC INNER LAYER
overall_length2.8070 INCHES MINIMUM AND 2.8170 INCHES MAXIMUM IN
body_inside_diameter3.5000 INCHES MINIMUM AND 3.5020 INCHES MAXIMUM IN
body_outside_diameter4.2310 INCHES MINIMUM AND 4.2410 INCHES MAXIMUM IN
material_document_and_classificationQQ-A-225-9 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-200-11 FED SPEC SINGLE MATERIAL RESPONSE OUTER LAYER
NSN3120-00-305-3551
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: HSPR56-90MD · 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
•
BODY OUTSIDE DIAMETER: 4.2310 INCHES MINIMUM AND 4.2410 INCHES MAXIMUM IN
•
MATERIAL: ALUMINUM ALLOY OUTER LAYER
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225-9 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-200-11 FED SPEC SINGLE MATERIAL RESPONSE OUTER LAYER
•
BODY INSIDE DIAMETER: 3.5000 INCHES MINIMUM AND 3.5020 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
BODY OUTSIDE DIAMETER4.2310 INCHES MINIMUM AND 4.2410 INCHES MAXIMUM IN
MATERIALALUMINUM ALLOY OUTER LAYER
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225-9 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-200-11 FED SPEC SINGLE MATERIAL RESPONSE OUTER LAYER
MATERIALPLASTIC INNER LAYER
OVERALL LENGTH2.8070 INCHES MINIMUM AND 2.8170 INCHES MAXIMUM IN
BODY INSIDE DIAMETER3.5000 INCHES MINIMUM AND 3.5020 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
911-10Interchangeable
interchangeable cross-reference
interchangeable
911-229Interchangeable
interchangeable cross-reference
interchangeable
B18.3Interchangeable
interchangeable cross-reference
interchangeable
KDJ56-6Interchangeable
Same NIIN cross-reference
interchangeable
68B458001-101Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is HSPR56-90MD?
HSPR56-90MD is a BEARING,SLEEVE.
What parts can replace HSPR56-90MD?
There are 5 known substitutes for HSPR56-90MD: 911-10, 911-229, B18.3 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for HSPR56-90MD?
HSPR56-90MD is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-305-3551. 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