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PartsTable / COMPONENT / ASTM B 438/B 438M
ASTM B 438/B 438M ✓ 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 ASTM B 438/B 438M is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-287-7546, 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
ASTM B 438/B 438M
NSN: 3120-00-287-7546
FSC: 3120
CAGE: 81346 — AMERICAN SOCIETY FOR TESTING AND MATERIALS DBA ASTM INTERNATIONAL (USA)
SPECIFICATIONS
Part NumberASTM B 438/B 438M
NSN3120-00-287-7546
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: ASTM B 438/B 438M · 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: 0.6255 INCHES MINIMUM AND 0.6265 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.7515 INCHES MINIMUM AND 0.7525 INCHES MAXIMUM IN
•
CORNER SHAPE: SQUARE INSIDE LEFT CORNER
•
MATERIAL: COPPER ALLOY OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
BODY INSIDE DIAMETER0.6255 INCHES MINIMUM AND 0.6265 INCHES MAXIMUM IN
OVERALL LENGTH1.0000 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.7515 INCHES MINIMUM AND 0.7525 INCHES MAXIMUM IN
CORNER SHAPESQUARE INSIDE LEFT CORNER
MATERIALCOPPER ALLOY OVERALL
CORNER SHAPESQUARE INSIDE RIGHT CORNER
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPEROUND LEFT FLANGE BODY CORNER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
F1207-2Interchangeable
interchangeable cross-reference
interchangeable
64913Interchangeable
interchangeable cross-reference
interchangeable
T2001Interchangeable
interchangeable cross-reference
interchangeable
TT2001Interchangeable
interchangeable cross-reference
interchangeable
517415-12Interchangeable
interchangeable cross-reference
interchangeable
EP081014Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ASTM B 438/B 438M?
ASTM B 438/B 438M is a ASTM B 438/B 438M.
What parts can replace ASTM B 438/B 438M?
There are 19 known substitutes for ASTM B 438/B 438M: F1207-2, 64913, T2001 and 16 more. Substitute compatibility should be verified for your specific system.
Is ASTM B 438/B 438M still available?
ASTM B 438/B 438M is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026