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Brass and steel ground clamp, 300A rating, alloy steel construction

Value Brand

Value Brand Ground Clamp 300A 19N770

SKU CH-K1TW-5NP2R

A 300-amp ground clamp built from alloy steel for secure electrical connections

  • Product typeBuilding Wire
  • 300 A capacity handles heavy welding current
  • Alloy steel construction resists wear and deformation
  • Brass and steel jaws ensure strong electrical contact
  • California Proposition 65 warning for cancer risk
  • California Proposition 65 warning for reproductive harm risk

Ground Clamp 300A Rating

This ground clamp carries a 300 ampere rating and suits welding, automotive and general electrical grounding tasks. It is built from alloy steel with brass and steel components for conductivity and strength. The ZORO SELECT 19N770 model is supplied new for workshop and site use.

Replaces Worn Or Undersized Clamps

Swap this in when an existing clamp has lost spring tension, shows corrosion or cannot handle the required amperage. The 300A capacity covers heavy-duty welding circuits and high-current temporary bonds. It is not for buyers who need an insulated clamp or a model rated above 300 amperes.

Simple Jaw Installation

Open the jaw to a maximum of 2 1/2 inches, position on the workpiece and release to lock. Clean contact surfaces before each use to maintain low resistance. The Proposition 65 notice applies to materials in the clamp; handle with appropriate hygiene. No tools are required for fitting.

How it compares

Measured against everything we stock in Wire, Cable & Wiring Supplies, at today’s prices. Recalculated every night.

Price $30.99
Pricier than about 54% of the 1,610 comparable items (median $25.99).

Specifications

Product
Brand nameZORO SELECT
Product typeBuilding Wire

Questions about this item

How wide does the jaw open on the 19N770 ground clamp?

The jaw opens to 2 1/2 inches, allowing it to grip thick workpieces or pipe for a secure ground connection.

What is the correct way to tighten the 300 A ground clamp so it does not slip?

Clean the contact surface first, then turn the screw until the alloy-steel jaws bite firmly; the step most users skip is removing paint or rust before clamping.

When should the brass-and-steel ground clamp be replaced?

Replace it if the jaws no longer close tightly, the threads strip, or the brass contact face shows deep pitting or heavy corrosion.

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