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7578-18 — BEARING,WASHER,THRUST

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

7578-18: BEARING,WASHER,THRUST.

The BEARING,WASHER,THRUST is a the manufacturer industrial component. Key specifications include diameter: 1.0050 INCHES MINIMUM AND 1.0120 INCHES MAXIMUM IN, material: STEEL OVERALL, corner_shape: SQUARE ALL CORNERS, outside_diameter: 1.2350 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN, style_designator: ROUND, features_provided: CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-899-4072, 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
7578-18
NSN: 3120-00-899-4072
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 52793 — SAGINAW PRODUCTS CORPORATION DBA CIGNYS (USA)
SPECIFICATIONS
diameter1.0050 INCHES MINIMUM AND 1.0120 INCHES MAXIMUM IN
materialSTEEL OVERALL
corner_shapeSQUARE ALL CORNERS
outside_diameter1.2350 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN
style_designatorROUND
features_providedCASEHARDENED
overall_thickness0.0850 INCHES MINIMUM AND 0.0870 INCHES MAXIMUM IN
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-631 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-634 FED SPEC 2ND MATERIAL RESPONSE OVERALL
NSN3120-00-899-4072
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 7578-18 · 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: 0.0850 INCHES MINIMUM AND 0.0870 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: ROUND
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-631 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-634 FED SPEC 2ND MATERIAL RESPONSE OVERALL
•
DIAMETER: 1.0050 INCHES MINIMUM AND 1.0120 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OUTSIDE DIAMETER: 1.2350 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN
•
FEATURES PROVIDED: CASEHARDENED
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
OVERALL THICKNESS0.0850 INCHES MINIMUM AND 0.0870 INCHES MAXIMUM IN
STYLE DESIGNATORROUND
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-631 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-634 FED SPEC 2ND MATERIAL RESPONSE OVERALL
DIAMETER1.0050 INCHES MINIMUM AND 1.0120 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OUTSIDE DIAMETER1.2350 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN
FEATURES PROVIDEDCASEHARDENED
MATERIALSTEEL OVERALL
MATERIALOIL LUBRICATING LUBRICATION
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

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 7578-18?
7578-18 is a BEARING,WASHER,THRUST.
What is the NSN for 7578-18?
7578-18 is cataloged in the U.S. Government catalog under NSN 3120-00-899-4072. 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.