PartsTable
Technical Data Sheet
Download PDF

4M45-4-25 — BUSHING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

4M45-4-25: BUSHING,SLEEVE.

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OVERALL, corner_shape: SQUARE INSIDE LEFT CORNER, flange_width: 0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN, overall_length: 0.3050 INCHES MINIMUM AND 0.3170 INCHES MAXIMUM IN, surface_finish: 125.0 MICROINCHES RIGHT END SURFACE OF BODY, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-554-2016, 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
4M45-4-25
NSN: 3120-00-554-2016
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
corner_shapeSQUARE INSIDE LEFT CORNER
flange_width0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN
overall_length0.3050 INCHES MINIMUM AND 0.3170 INCHES MAXIMUM IN
surface_finish125.0 MICROINCHES RIGHT END SURFACE OF BODY
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentCADMIUM OVERALL
body_inside_diameter0.2435 INCHES MINIMUM AND 0.2450 INCHES MAXIMUM IN
body_outside_diameter0.3766 INCHES MINIMUM AND 0.3771 INCHES MAXIMUM IN
flange_outside_diameter0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3120-00-554-2016
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 4M45-4-25 · 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
•
SURFACE FINISH: 125.0 MICROINCHES RIGHT END SURFACE OF LEFT FLANGE
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES RIGHT END SURFACE OF LEFT FLANGE
SURFACE FINISH125.0 MICROINCHES LEFT END SURFACE OF BODY AND FLANGE
SURFACE FINISH125.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH125.0 MICROINCHES RIGHT END SURFACE OF BODY
SURFACE FINISH125.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF FLANGE
SURFACE FINISH63.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
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
Ready to buy 4M45-4-25?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 4M45-4-25?
4M45-4-25 is a BUSHING,SLEEVE.
What is the NSN for 4M45-4-25?
4M45-4-25 is cataloged in the U.S. Government catalog under NSN 3120-00-554-2016. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 4M45-4-25

✓ 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.