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ST4M166-4-102 — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

ST4M166-4-102: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 OVERALL, corner_shape: SQUARE ALL CORNERS, hole_diameter: 0.0780 INCHES MINIMUM AND 0.0830 INCHES MAXIMUM FIRST IN, overall_length: 1.1300 INCHES MINIMUM AND 1.1350 INCHES MAXIMUM IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-345-2139, 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
ST4M166-4-102
NSN: 3120-00-345-2139
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 94892 — MASTER MACHINE PRODUCTS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 630 OVERALL
corner_shapeSQUARE ALL CORNERS
hole_diameter0.0780 INCHES MINIMUM AND 0.0830 INCHES MAXIMUM FIRST IN
overall_length1.1300 INCHES MINIMUM AND 1.1350 INCHES MAXIMUM IN
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
surface_treatmentPASSIVATE OVERALL
body_inside_diameter0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
body_outside_diameter0.3735 INCHES MINIMUM AND 0.3740 INCHES MAXIMUM IN
material_document_and_classificationAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
antirotation/lubrication_type_and_quantity2 HOLE
NSN3120-00-345-2139
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: ST4M166-4-102 · 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
•
BODY OUTSIDE DIAMETER: 0.3735 INCHES MINIMUM AND 0.3740 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
ANTIROTATION/LUBRICATION TYPE AND QUANTITY: 2 HOLE
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER0.3735 INCHES MINIMUM AND 0.3740 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH1.1300 INCHES MINIMUM AND 1.1350 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.2500 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
ANTIROTATION/LUBRICATION TYPE AND QUANTITY2 HOLE
MATERIALSTEEL COMP 630 OVERALL
HOLE DIAMETER0.0780 INCHES MINIMUM AND 0.0830 INCHES MAXIMUM FIRST IN
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST4M166-4-102?
ST4M166-4-102 is a BUSHING,SLEEVE.
What is the NSN for ST4M166-4-102?
ST4M166-4-102 is cataloged in the U.S. Government catalog under NSN 3120-00-345-2139. 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.