PartsTable
Technical Data Sheet
ML21A ✓ 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 MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OR IRON COMP B OR IRON COMP A1 OR IRON COMP A2 OR IRON COMP A3 OVERALL, corner_shape: SQUARE ALL CORNERS, overall_length: 0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN, hardness_rating: 30.0 ROCKWELL C MINIMUM AND 70.0 ROCKWELL C MAXIMUM OVERALL, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 0.8760 INCHES MINIMUM AND 0.8770 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-293-5488, 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
ML21A
NSN: 3120-00-293-5488
FSC: 3120
CAGE: 68505 — PRESTOLITE ELECTRIC INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OR IRON COMP B OR IRON COMP A1 OR IRON COMP A2 OR IRON COMP A3 OVERALL
corner_shapeSQUARE ALL CORNERS
overall_length0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN
hardness_rating30.0 ROCKWELL C MINIMUM AND 70.0 ROCKWELL C MAXIMUM OVERALL
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter0.8760 INCHES MINIMUM AND 0.8770 INCHES MAXIMUM IN
body_outside_diameter1.0020 INCHES MINIMUM AND 1.0030 INCHES MAXIMUM IN
material_document_and_classificationMIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
NSN3120-00-293-5488
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: ML21A · 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
BODY INSIDE DIAMETER: 0.8760 INCHES MINIMUM AND 0.8770 INCHES MAXIMUM IN
CORNER SHAPE: SQUARE ALL CORNERS
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL: LUBRICANT LUBRICATION
BODY OUTSIDE DIAMETER: 1.0003 INCHES MINIMUM AND 1.0004 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
BODY INSIDE DIAMETER0.8760 INCHES MINIMUM AND 0.8770 INCHES MAXIMUM IN
CORNER SHAPESQUARE ALL CORNERS
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIALLUBRICANT LUBRICATION
MATERIALCOPPER ALLOY OVERALL
OVERALL LENGTH1.0000 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.0003 INCHES MINIMUM AND 1.0004 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
ML21AInterchangeable
interchangeable cross-reference
interchangeable
A1009-3Interchangeable
interchangeable cross-reference
interchangeable
P87-8Interchangeable
interchangeable cross-reference
interchangeable
AA1009-3Interchangeable
interchangeable cross-reference
interchangeable
IC21AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ML21A?
ML21A is a MICROCIRCUIT,DIGITAL.
What parts can replace ML21A?
There are 5 known substitutes for ML21A: ML21A, A1009-3, P87-8 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ML21A?
ML21A is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-293-5488. This indicates validated use in U.S. government and defense supply chains.
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