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493B — LOCKING DEVICE,CIRCUIT BREAKER

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

493B: LOCKING DEVICE,CIRCUIT BREAKER.

The LOCKING DEVICE,CIRCUIT BREAKER is a the manufacturer industrial component. Key specifications include material: STEEL, flange_width: 0.2188 INCHES NOMINAL IN, overall_width: 0.8750 INCHES NOMINAL IN, special_features: FOR STANDARD SINGLE AND DOUBLE TOGGLES; NARROW PROFILE; POWDER COATED, style_designator: NORMAL ANGLE, FLANGED, backface_corner_radius: 0.1250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-159-9453, 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
MRO→ MRO_GENERAL→ 493B
NSN: 3110-00-159-9453
NIINs: 001599453, 015703235
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL
flange_width0.2188 INCHES NOMINAL IN
overall_width0.8750 INCHES NOMINAL IN
special_featuresFOR STANDARD SINGLE AND DOUBLE TOGGLES; NARROW PROFILE; POWDER COATED
style_designatorNORMAL ANGLE, FLANGED
backface_corner_radius0.1250 INCHES NOMINAL IN
flange_outside_diameter5.5930 INCHES NOMINAL IN
outer_ring_outside_diameter5.3750 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-159-9453
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 493B · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLANGE OUTSIDE DIAMETER: 5.5930 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE, FLANGED
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
FLANGE WIDTH: 0.2188 INCHES NOMINAL IN
•
OUTER RING OUTSIDE DIAMETER: 5.3750 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
FLANGE OUTSIDE DIAMETER5.5930 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE, FLANGED
OVERALL WIDTH0.8750 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
FLANGE WIDTH0.2188 INCHES NOMINAL IN
OUTER RING OUTSIDE DIAMETER5.3750 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
101550Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
706670Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 493B?
493B is a LOCKING DEVICE,CIRCUIT BREAKER. It is classified as a MRO (MRO_GENERAL).
What parts can replace 493B?
There are 2 known substitutes for 493B: 101550, 706670. Substitute compatibility should be verified for your specific system.
What is the NSN for 493B?
493B is cataloged in the U.S. Government catalog under NSN 3110-00-159-9453. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.