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Technical Data Sheet
PartsTable / COMPONENT / PMC78
PMC78 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

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: 0.0430 INCHES MINIMUM AND 0.0450 INCHES MAXIMUM IN, overall_length: 0.3800 INCHES NOMINAL IN, surface_finish: 63.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY, special_features: ID REAMED WITH REVERSE SPIRAL REAMER,OD GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-555-5755, 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
PMC78
NSN: 3120-00-555-5755
FSC: 3120
CAGE: 21158 — P W AND E INDUSTRIES (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OVERALL
corner_shapeSQUARE INSIDE LEFT CORNER
flange_width0.0430 INCHES MINIMUM AND 0.0450 INCHES MAXIMUM IN
overall_length0.3800 INCHES NOMINAL IN
surface_finish63.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
special_featuresID REAMED WITH REVERSE SPIRAL REAMER,OD GROUND
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentCADMIUM RIGHT END SURFACE OF BODY
body_inside_diameter0.3750 INCHES MINIMUM AND 0.3755 INCHES MAXIMUM IN
body_outside_diameter0.4694 INCHES MINIMUM AND 0.4698 INCHES MAXIMUM IN
flange_outside_diameter0.6200 INCHES NOMINAL IN
material_document_and_classificationMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3120-00-555-5755
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: PMC78 · 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
•
FLANGE OUTSIDE DIAMETER: 0.6200 INCHES NOMINAL IN
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
•
SURFACE TREATMENT: CADMIUM LEFT END SURFACE OF BODY AND FLANGE
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE OUTSIDE DIAMETER0.6200 INCHES NOMINAL IN
CORNER SHAPESQUARE INSIDE RIGHT CORNER
SURFACE TREATMENTCADMIUM LEFT END SURFACE OF BODY AND FLANGE
SURFACE TREATMENTCADMIUM OUTSIDE DIAMETER SURFACE OF BODY
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
SURFACE TREATMENTCADMIUM RIGHT END SURFACE OF LEFT FLANGE
SPECIAL FEATURESID REAMED WITH REVERSE SPIRAL REAMER,OD GROUND
SURFACE TREATMENTCADMIUM RIGHT END SURFACE OF BODY
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
6123Interchangeable
interchangeable cross-reference
interchangeable
5385Interchangeable
interchangeable cross-reference
interchangeable
BA40Interchangeable
interchangeable cross-reference
interchangeable
5-385-1Interchangeable
interchangeable cross-reference
interchangeable
RP5A2154Interchangeable
interchangeable cross-reference
interchangeable
934759Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PMC78?
PMC78 is a BUSHING,SLEEVE.
What parts can replace PMC78?
There are 15 known substitutes for PMC78: 6123, 5385, BA40 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for PMC78?
PMC78 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-555-5755. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026