General Tools & Instruments 147 6 In. Digital Fractional Caliper
- Set
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A 1/2" drive bit holder adapter with a set screw for secure fastener retention on heavy equipment
The Apex SC-514 adapter fits a 1/2" square drive and uses a set screw to lock bits in place. It is built for technicians who need a secure connection when working on heavy equipment or machinery. The natural finish provides a clean appearance on the job.
The set screw mechanism grips the bit shank directly, so holding power depends on screw tightness and bit condition. It is not a quick-release system, so bit changes take longer than spring-loaded alternatives. High vibration or extreme torque can loosen the screw over time.
Verify that your ratchet or breaker bar has a 1/2" square drive to match this adapter. Confirm the bits you intend to use have shanks that fit the adapter's internal bore and accept a set screw. Ensure clearance allows for the 1 5/8" overall length in your work area.
Measured against everything we stock in Ratchets, Sockets & Drive Tools, at today’s prices. Recalculated every night.
| Product | |
|---|---|
| Brand name | APEX TOOL GROUP |
| Product color | Transparent |
The supplier lists only the SC-514 model for this adapter with set screw retention. No other versions or capacities are mentioned in the product data.
The 1 5/8 in overall length provides a compact profile for tight spaces on heavy equipment while still allowing the set screw to hold fasteners securely during use.
The 1/2 in square drive accepts standard 1/2 in drive sockets and allows attachment without alignment issues, while the set screw retention keeps bits firmly in place.
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