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373-503-383-404 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

373-503-383-404: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, corner_shape: SQUARE INSIDE LEFT CORNER, flange_width: 0.0590 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN, overall_length: 0.3740 INCHES MINIMUM AND 0.3870 INCHES MAXIMUM IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, body_inside_diameter: 0.3710 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-554-5348, 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
373-503-383-404
NSN: 3120-00-554-5348
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 00481 — ASCO SINTERING CO
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
corner_shapeSQUARE INSIDE LEFT CORNER
flange_width0.0590 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN
overall_length0.3740 INCHES MINIMUM AND 0.3870 INCHES MAXIMUM IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
body_inside_diameter0.3710 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM IN
body_outside_diameter0.5010 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
flange_outside_diameter0.6150 INCHES MINIMUM AND 0.6350 INCHES MAXIMUM IN
nondefinitive_spec/std_data1 TYPE AND A COMPOSITION
departure_from_cited_designatorAS MODIFIED BY BODY OUTSIDE DIAMETER,AS MODIFIED BY BODY INSIDE DIAMETER
material_document_and_classificationMIL-L-11734 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
NSN3120-00-554-5348
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 373-503-383-404 · 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: 0.6150 INCHES MINIMUM AND 0.6350 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.5010 INCHES MINIMUM AND 0.5030 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 DIAMETER0.6150 INCHES MINIMUM AND 0.6350 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.5010 INCHES MINIMUM AND 0.5030 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OTHER ITEMS IN FSC 3120 — Bearings, Plain, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3120-00-001-1288 3120-00-001-1835 3120-00-001-1838 3120-00-001-1928 3120-00-001-1934 3120-00-001-3933 3120-00-001-3937 3120-00-001-3938
SUBSTITUTES & CROSS-REFERENCES 2
MILB5687Reference document
Same NSN cross-reference
Reference document — Identification reference
9018Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 373-503-383-404?
373-503-383-404 is a BEARING,SLEEVE.
What parts can replace 373-503-383-404?
There are 2 known substitutes for 373-503-383-404: MILB5687, 9018. Substitute compatibility should be verified for your specific system.
What is the NSN for 373-503-383-404?
373-503-383-404 is cataloged in the U.S. Government catalog under NSN 3120-00-554-5348. This indicates validated use in U.S. government and defense supply chains.
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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.