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Technical Data Sheet
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NAS74 ✓ 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: COPPER ALLOY 630 OVERALL, corner_shape: SQUARE INSIDE LEFT CORNER, flange_width: 0.0550 INCHES MINIMUM AND 0.0600 INCHES MAXIMUM IN, bore_diameter: 0.4370 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN, overall_length: 1.2550 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-045-4944, 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
NAS74
NSN: 3120-00-045-4944
FSC: 3120
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialCOPPER ALLOY 630 OVERALL
corner_shapeSQUARE INSIDE LEFT CORNER
flange_width0.0550 INCHES MINIMUM AND 0.0600 INCHES MAXIMUM IN
bore_diameter0.4370 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM IN
overall_length1.2550 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
v_groove_angle90.0 DEGREES MINIMUM
v_groove_width0.3710 INCHES MINIMUM AND 0.3760 INCHES MAXIMUM IN
hardness_rating55.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM INNER MEMBER
special_featuresID AND OD TO BE PARALLEL AND CONCENTRIC WITHIN 0.0300 TIR
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
surface_treatmentCADMIUM OVERALL
NSN3120-00-045-4944
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: NAS74 · 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 INSIDE LEFT CORNER
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-6946 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
SURFACE GROOVE LOCATION AND QUANTITY: 1 EXTERNAL
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
SPECIFICATION/STANDARD DATA: 80205-NAS74 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
LUBRICANT ACCOMMODATION STYLE: GROOVED CIRCULAR
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPESQUARE INSIDE LEFT CORNER
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-6946 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CORNER SHAPESQUARE INSIDE RIGHT CORNER
SURFACE TREATMENTCADMIUM OVERALL
SURFACE GROOVE LOCATION AND QUANTITY1 EXTERNAL
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
SPECIFICATION/STANDARD DATA80205-NAS74 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
LUBRICANT ACCOMMODATION STYLEGROOVED CIRCULAR
BODY INSIDE DIAMETER0.4370 INCHES MINIMUM AND 0.4385 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.6210 INCHES MINIMUM AND 0.6230 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES

No verified substitutes available.

LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS74?
NAS74 is a BEARING,PLAIN,SELF-ALIGNING.
What is the NSN for NAS74?
NAS74 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-045-4944. 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