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Technical Data Sheet
PartsTable / COMPONENT / NAS538
NAS538 ✓ 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: STEEL CORROSION RESISTING OVERALL, corner_shape: SQUARE OUTSIDE LEFT CORNER, flange_width: 0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN, bore_diameter: 0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN, heat_treatment: QUENCH, MIL-H-6875, COND H1025, overall_length: 0.18 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 3120-00-026-2525, 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
NAS538
NSN: 3120-00-026-2525
FSC: 3120
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
corner_shapeSQUARE OUTSIDE LEFT CORNER
flange_width0.055 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
bore_diameter0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN
heat_treatmentQUENCH, MIL-H-6875, COND H1025
overall_length0.18 INCHES NOMINAL IN
surface_finish63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
hardness_rating30.0 ROCKWELL C MINIMUM AND 70.0 ROCKWELL C MAXIMUM OVERALL
special_featuresDYED LIGHT BLUE
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentPASSIVATE OVERALL
inner_member_width0.5570 INCHES MINIMUM AND 0.5620 INCHES MAXIMUM IN
NSN3120-00-026-2525
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: NAS538 · 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 LEFT FLANGE OUTSIDE RIGHT CORNER
•
MATERIAL: STEEL COMP 4130 OR STEEL COMP 8630 OVERALL
•
SPECIFICATION/STANDARD DATA: 80205-NAS538 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STYLE DESIGNATOR: SOLID, EXTERNAL FLANGE ONE END
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
MATERIALSTEEL COMP 4130 OR STEEL COMP 8630 OVERALL
SPECIFICATION/STANDARD DATA80205-NAS538 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
SURFACE TREATMENTCADMIUM OVERALL
CORNER SHAPECHAMFERED INSIDE LEFT CORNER
BODY OUTSIDE DIAMETER0.6257 INCHES MINIMUM AND 0.6265 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 1
NAS538-8P53Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS538?
NAS538 is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace NAS538?
There is 1 known substitute for NAS538: NAS538-8P53. Substitute compatibility should be verified for your specific system.
What is the NSN for NAS538?
NAS538 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-026-2525. 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