CP 8940166937 1/2" Dr. Flip Deep Impact Socket, Metric 17 x 21mm
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Professional Flip Deep Impact Socket - Chicago Pneumatic S417 (17mm x 21mm)
Flip Impact Socket Design with Heavy-Duty Chrome-Molybdenum Construction
You'll love how this flip deep impact socket eliminates tool changes during lug nut service calls. Perfect for automotive professionals who need two essential metric sizes (17mm and 21mm) in one durable tool, designed specifically for high-torque automotive work. Built with chrome-molybdenum steel and phosphate manganese coating, it handles the hammering action of impact wrenches without cracking or deforming.
Key Features and Benefits
Dual-Size Efficiency
Quick flip action between 17mm and 21mm eliminates tool changes during tire rotations and brake work. Laser-etched size markings stay visible even in low-light shop conditions.
Impact-Rated Durability
Chrome-molybdenum steel construction absorbs shock from pneumatic and cordless impact wrenches without splitting. Phosphate manganese finish resists corrosion from shop environments.
Deep Socket Design
Extended length reaches recessed lug nuts and long wheel studs. Cross hole accepts retaining pins and locking anvils for secure attachment to impact tools.
Applications
Perfect for automotive professionals who need reliable impact socket performance across multiple vehicle types. Ideal when you're working with mixed metric lug nut sizes and need consistent, professional results.
- Tire rotations and wheel removals on passenger vehicles
- Fleet maintenance with mixed 17mm and 21mm lug nut sizes
- Mobile tire service and roadside assistance
- Brake service requiring deep socket reach
- Impact wrench and pneumatic tool applications
Specifications
| Drive Size | 1/2" Square Drive |
|---|---|
| Socket Sizes | 17mm and 21mm Metric |
| Socket Type | Flip Deep Impact Socket |
| Material | Chrome-molybdenum Steel |
| Finish | Phosphate Manganese |
| Length | 2.99 inches (76mm) |
| Weight | 0.4 lbs (0.18 kg) |
| Model Number | S417X21MFD |
Installation
Attaching this flip impact socket to your impact wrench is straightforward:
- Ensure your impact wrench is turned off and disconnected from power
- Insert the socket's 1/2" square drive into your tool's anvil until it clicks
- If using a locking anvil, ensure the retaining pin engages the cross hole
- Test the connection by gently pulling the socket - it should remain secure
- Select your needed size (17mm or 21mm) by flipping the socket
CTA
Join thousands of automotive professionals who rely on Chicago Pneumatic impact sockets for demanding shop work. This dual-size flip socket streamlines your workflow and stands up to daily impact wrench use.
Order now and eliminate socket changes during your next tire service.
Frequently Asked Questions
How does this compare to regular chrome sockets?
Impact sockets like this one are specifically engineered for the shock loads from impact wrenches. The chrome-molybdenum steel construction and softer material properties prevent cracking that would destroy regular chrome sockets under impact tool use. Regular sockets are hardened for hand tool use but become brittle under impact forces.
Will this work with my cordless impact wrench?
Yes, this socket works with both pneumatic and cordless impact wrenches that have 1/2" square drives. The cross hole accepts retaining pins and locking anvils for secure attachment. It's designed to handle the torque output of professional cordless impacts.
What's the advantage of a flip socket over individual sockets?
Flip sockets eliminate tool changes when working with different fastener sizes. Instead of reaching for two separate sockets, you simply flip to the needed size. This saves time during tire rotations, brake work, or any job involving mixed 17mm and 21mm fasteners.
Is this socket deep enough for recessed lug nuts?
At 2.99 inches long, this deep socket reaches most recessed lug nuts and extended wheel studs. The deep design provides clearance for protruding studs that would bottom out in standard-length sockets, making it ideal for truck wheels and aftermarket rims.
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