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RA76-54 — BEARING,WASHER,THRUST

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

RA76-54: BEARING,WASHER,THRUST.

The BEARING,WASHER,THRUST is a the manufacturer industrial component. Key specifications include diameter: 0.5150 INCHES NOMINAL IN, material: STEEL OVERALL, key_length: 0.0620 INCHES NOMINAL IN, key_radius: 0.0620 INCHES NOMINAL IN, corner_shape: SQUARE ALL CORNERS, hardness_rating: 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-540-7291, 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
RA76-54
NSN: 3120-00-540-7291
NIINs: 005407291, 015634296
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 51663 — HYDRO-AIRE AEROSPACE CORP. DBA LEAR ROMEC DIV LEAR ROMEC (USA)
SPECIFICATIONS
diameter0.5150 INCHES NOMINAL IN
materialSTEEL OVERALL
key_length0.0620 INCHES NOMINAL IN
key_radius0.0620 INCHES NOMINAL IN
corner_shapeSQUARE ALL CORNERS
key_quantity2
hardness_rating24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
outside_diameter0.9688 INCHES NOMINAL IN
style_designatorROUND W/ROUND KEYS
features_providedCASEHARDENED
overall_thickness0.1390 INCHES NOMINAL IN
surface_conditionLAPPED
NSN3120-00-540-7291
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: RA76-54 · 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 ALL CORNERS
•
OVERALL THICKNESS: 0.1390 INCHES NOMINAL IN
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
•
STYLE DESIGNATOR: ROUND W/ROUND KEYS
•
DIAMETER: 0.5150 INCHES NOMINAL IN
•
SURFACE CONDITION: LAPPED
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 0.9688 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
OVERALL THICKNESS0.1390 INCHES NOMINAL IN
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
STYLE DESIGNATORROUND W/ROUND KEYS
DIAMETER0.5150 INCHES NOMINAL IN
SURFACE CONDITIONLAPPED
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER0.9688 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED
KEY QUANTITY2
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RA76-54?
RA76-54 is a BEARING,WASHER,THRUST.
What is the NSN for RA76-54?
RA76-54 is cataloged in the U.S. Government catalog under NSN 3120-00-540-7291. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.