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Technical Data Sheet
PartsTable / COMPONENT / KSSB-12-5
KSSB-12-5 ✓ 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,PLAIN,SELF-ALIGNING is a the manufacturer industrial component. Key specifications include material: LUBRICANT DRY FILM OR GREASE LUBRICATION, bore_diameter: 0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN, hardness_rating: 57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER, style_designator: WITHOUT INSERT OR LINER, surface_treatment: CHROMIUM INNER MEMBER, inner_member_width: 0.4000 INCHES MINIMUM AND 0.4050 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 3120-01-029-8995, 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
KSSB-12-5
NSN: 3120-01-029-8995
FSC: 3120
CAGE: 97613 — SARGENT AEROSPACE & DEFENSE, LLC DBA KAHR BEARINGS (USA)
SPECIFICATIONS
materialLUBRICANT DRY FILM OR GREASE LUBRICATION
bore_diameter0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
hardness_rating57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER
style_designatorWITHOUT INSERT OR LINER
surface_treatmentCHROMIUM INNER MEMBER
inner_member_width0.4000 INCHES MINIMUM AND 0.4050 INCHES MAXIMUM IN
outer_member_width0.3220 INCHES MINIMUM AND 0.3320 INCHES MAXIMUM IN
lubrication_featureGROOVE EXTERNAL OUTER MEMBER
static_radial_load_rating12800 POUNDS LBS
outer_member_outside_diameter1.0620 INCHES MINIMUM AND 1.0625 INCHES MAXIMUM IN
material_document_and_classificationMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
NSN3120-01-029-8995
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: KSSB-12-5 · 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
•
STATIC RADIAL LOAD RATING: 12800 POUNDS LBS
•
INNER MEMBER WIDTH: 0.4000 INCHES MINIMUM AND 0.4050 INCHES MAXIMUM IN
•
OUTER MEMBER WIDTH: 0.3220 INCHES MINIMUM AND 0.3320 INCHES MAXIMUM IN
•
OUTER MEMBER OUTSIDE DIAMETER: 1.0620 INCHES MINIMUM AND 1.0625 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP E52100 INNER MEMBER
•
STYLE DESIGNATOR: WITHOUT INSERT OR LINER
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
•
HARDNESS RATING: 57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER
TECHNICAL CHARACTERISTICS (FLIS)
STATIC RADIAL LOAD RATING12800 POUNDS LBS
INNER MEMBER WIDTH0.4000 INCHES MINIMUM AND 0.4050 INCHES MAXIMUM IN
OUTER MEMBER WIDTH0.3220 INCHES MINIMUM AND 0.3320 INCHES MAXIMUM IN
OUTER MEMBER OUTSIDE DIAMETER1.0620 INCHES MINIMUM AND 1.0625 INCHES MAXIMUM IN
MATERIALSTEEL COMP E52100 INNER MEMBER
STYLE DESIGNATORWITHOUT INSERT OR LINER
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
HARDNESS RATING57.0 ROCKWELL C MINIMUM AND 61.0 ROCKWELL C MAXIMUM INNER MEMBER
MATERIALCOPPER ALLOY OUTER RACE MEMBER
SURFACE TREATMENTCHROMIUM INNER MEMBER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
SAE-J512Interchangeable
interchangeable cross-reference
interchangeable
144303Interchangeable
interchangeable cross-reference
interchangeable
41X2Interchangeable
interchangeable cross-reference
interchangeable
55018Interchangeable
interchangeable cross-reference
interchangeable
10-001-1Interchangeable
interchangeable cross-reference
interchangeable
04207Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KSSB-12-5?
KSSB-12-5 is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace KSSB-12-5?
There are 20 known substitutes for KSSB-12-5: SAE-J512, 144303, 41X2 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KSSB-12-5?
KSSB-12-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-029-8995. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026