PartsTable
Technical Data Sheet
B688 ✓ 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 TRANSFORMER,POWER is a the manufacturer industrial component. Key specifications include angle: 45.0 DEGREES, height: 0.875 INCHES NOMINAL IN, material: STEEL OVERALL, corner_shape: SQUARE ALL CORNERS, shank_length: 0.594 INCHES NOMINAL IN, thread_class: 2A A. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-661-5048, 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
B688
NSN: 3120-00-661-5048
FSC: 3120
CAGE: 71041 — ALTRA INDUSTRIAL MOTION CORP. (USA)
SPECIFICATIONS
angle45.0 DEGREES
height0.875 INCHES NOMINAL IN
materialSTEEL OVERALL
corner_shapeSQUARE ALL CORNERS
shank_length0.594 INCHES NOMINAL IN
thread_class2A A
overall_length0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN
style_designatorANGLE
nominal_thread_size0.125 INCHES IN
body_inside_diameter0.3770 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN
body_outside_diameter0.5015 INCHES MINIMUM AND 0.5025 INCHES MAXIMUM IN
thread_quantity_per_inch28
NSN3120-00-661-5048
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: B688 · 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
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: COPPER ALLOY OVERALL
BODY INSIDE DIAMETER: 0.3770 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER: 0.5015 INCHES MINIMUM AND 0.5025 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPESQUARE ALL CORNERS
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY OVERALL
BODY INSIDE DIAMETER0.3770 INCHES MINIMUM AND 0.3780 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.5015 INCHES MINIMUM AND 0.5025 INCHES MAXIMUM IN
MATERIALOIL LUBRICATING LUBRICATION
OVERALL LENGTH0.9950 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
1292XXWITH1120Interchangeable
interchangeable cross-reference
interchangeable
42502Interchangeable
interchangeable cross-reference
interchangeable
MIL-P-13218Interchangeable
interchangeable cross-reference
interchangeable
7533-4Interchangeable
interchangeable cross-reference
interchangeable
611170Interchangeable
interchangeable cross-reference
interchangeable
4303Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B688?
B688 is a TRANSFORMER,POWER.
What parts can replace B688?
There are 14 known substitutes for B688: 1292XXWITH1120, 42502, MIL-P-13218 and 11 more. Substitute compatibility should be verified for your specific system.
Is B688 still available?
B688 is currently cancelled.
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