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Technical Data Sheet
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52MST ✓ 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 HOUSING,BEARING UNIT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 52.00 MILLIMETERS NOMINAL MM, housing_length: 0.688 INCHES NOMINAL IN, shaft_end_type: OPEN, flange_thickness: 0.166 INCHES NOMINAL IN, housing_diameter: 2.797 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 3130-01-213-4380, 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
52MST
NSN: 3130-01-213-4380
FSC: 3130
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter52.00 MILLIMETERS NOMINAL MM
housing_length0.688 INCHES NOMINAL IN
shaft_end_typeOPEN
flange_thickness0.166 INCHES NOMINAL IN
housing_diameter2.797 INCHES NOMINAL IN
style_designatorFLANGE BLOCK
mounting_hole_typeSQUARE
mounting_hole_width0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
bolt_circle_diameter3.000 INCHES NOMINAL IN
assembly_overall_length0.688 INCHES NOMINAL IN
overall_outside_diameter3.750 INCHES NOMINAL IN
NSN3130-01-213-4380
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 52MST · 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
•
MOUNTING HOLE WIDTH: 0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: FLANGE BLOCK
•
SHAFT END TYPE: OPEN
•
BOLT CIRCLE DIAMETER: 3.000 INCHES NOMINAL IN
•
BORE DIAMETER: 52.00 MILLIMETERS NOMINAL MM
•
ASSEMBLY OVERALL LENGTH: 0.688 INCHES NOMINAL IN
•
HOUSING DIAMETER: 2.797 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING HOLE WIDTH0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORFLANGE BLOCK
SHAFT END TYPEOPEN
BOLT CIRCLE DIAMETER3.000 INCHES NOMINAL IN
BORE DIAMETER52.00 MILLIMETERS NOMINAL MM
ASSEMBLY OVERALL LENGTH0.688 INCHES NOMINAL IN
HOUSING DIAMETER2.797 INCHES NOMINAL IN
MOUNTING HOLE TYPESQUARE
HOUSING LENGTH0.688 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
SS-7208HInterchangeable
interchangeable cross-reference
interchangeable
13B23947-00Interchangeable
interchangeable cross-reference
interchangeable
2N3947Interchangeable
interchangeable cross-reference
interchangeable
059162Interchangeable
interchangeable cross-reference
interchangeable
8127Interchangeable
interchangeable cross-reference
interchangeable
5916Interchangeable
IBM Hd SAS Aa Cable - 6 Meter
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 52MST?
52MST is a HOUSING,BEARING UNIT.
What parts can replace 52MST?
There are 11 known substitutes for 52MST: SS-7208H, 13B23947-00, 2N3947 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 52MST?
52MST is cataloged in the Federal Logistics Information System (FLIS) under NSN 3130-01-213-4380. 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