What should be used to secure a socket to an impact wrench?

• A. Locking bolt
• B. Cotter pin
• C. Retainer ring
• D. Clamp ring

Answer: (C)

The idea here is secure, quick retention that can withstand high shock and rapid changes in direction. A retainer ring fits into a groove on the drive and locks the socket onto the impact wrench’s anvil. This ring holds the socket in place during operation, so it won’t slide off under torque or vibration, while still allowing easy socket changes.

Other options aren’t suitable for this purpose. A locking bolt would add unnecessary threading and holes, making it less practical for fast, frequent changes. A cotter pin isn’t designed to secure a rotating socket on a drive and can loosen or fail under impact. A clamp ring isn’t the standard method for retaining sockets on impact drives and wouldn’t reliably endure the hammering forces.

So, retainer ring is the appropriate choice for securing a socket to an impact wrench.