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903-8531 — DOOR,ACCESS

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

903-8531: DOOR,ACCESS.

The DOOR,ACCESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, corner_shape: SQUARE OUTSIDE LEFT CORNER, flange_width: 0.0720 INCHES NOMINAL IN, overall_length: 0.1480 INCHES NOMINAL IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-288-4738, 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
903-8531
NSN: 3120-00-288-4738
NIINs: 002884738, 008066554, 015064236
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 82577 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
corner_shapeSQUARE OUTSIDE LEFT CORNER
flange_width0.0720 INCHES NOMINAL IN
overall_length0.1480 INCHES NOMINAL IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentPASSIVATE OVERALL
body_inside_diameter0.3210 INCHES MINIMUM AND 0.3260 INCHES MAXIMUM IN
body_outside_diameter0.4340 INCHES MINIMUM AND 0.4390 INCHES MAXIMUM IN
flange_outside_diameter0.5000 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
NSN3120-00-288-4738
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 903-8531 · 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 RIGHT CORNER
•
FLANGE OUTSIDE DIAMETER: 0.5000 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.4340 INCHES MINIMUM AND 0.4390 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE INSIDE LEFT CORNER
FLANGE OUTSIDE DIAMETER0.5000 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.4340 INCHES MINIMUM AND 0.4390 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
OVERALL LENGTH0.1480 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 903-8531?
903-8531 is a DOOR,ACCESS.
What is the NSN for 903-8531?
903-8531 is cataloged in the U.S. Government catalog under NSN 3120-00-288-4738. 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.