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Grey Pneumatic black 12-point 20mm metric impact socket 3120M

Grey Pneumatic

Grey Pneumatic 3120M 3/4" Drive 20mm Metric Socket 12pt

SKU CH-5BER-7BMVH

A 20 mm impact socket with a 3/4 inch drive and 12-point profile for high-torque fastening

  • 3/4" drive fits heavy-duty impact wrenches
  • 20 mm metric size matches common fastener dimensions
  • 12-point design engages bolts from multiple angles
  • Impact-rated construction withstands high-torque applications
  • Grey Pneumatic brand trusted for professional workshop tools

Professional 20mm impact socket

The Grey Pneumatic 3120M is a 3/4 inch drive metric socket with a 12-point opening sized at 20mm. It is built for high-torque impact work on heavy equipment and commercial vehicles. The black finish resists corrosion in shop environments. Mechanics and fleet technicians will find it fits standard impact guns directly.

Capacity and headroom

The 12-point geometry engages fastener flats quickly, reducing rounding risk on worn nuts and bolts. It handles the torque output of common 3/4 inch drive impact wrenches used in suspension and driveline service. The wall thickness is designed for impact duty, not for continuous hammering on seized hardware beyond the tool's rated limit.

Upgrade path

This socket replaces worn or missing 20mm 12-point impacts in existing 3/4 inch drive sets. The jump is worth it when a 6-point socket slips on damaged fastener heads or when a shallow socket cannot reach a recessed nut. It does not serve applications requiring 1/2 inch drive compatibility or smaller fastener sizes.

How it compares

Measured against everything we stock in Tool Bags & Storage Cases, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 73% of the 2,748 comparable items (median $20.99).

Specifications

Product
Brand nameGREY PNEUMATIC

Questions about this item

Will the 3/4" drive on this Grey Pneumatic 3120M socket fit my existing 3/4" drive ratchet and extensions?

Yes, the 3/4" square drive is a standard size and will connect securely to any 3/4" drive ratchet, breaker bar or extension you already own.

How can I verify the 12-point socket is engaging the 20mm fastener correctly after setup?

You will feel the socket seat fully on the fastener flats with no play, and the 12-point geometry allows engagement at multiple angles for a positive grip.

Does the box contain only the 20mm 12-point socket or are adapters and a case included?

The package contains the single Grey Pneumatic 3120M 20mm metric impact socket; no adapters, rails or storage case are supplied.

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