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3M bare copper ring terminal for 4 AWG wire, 3/8 inch stud, tin finish, brazed barrel

3M

3M M4-38RX Ring Terminal 3/8 in Stud 4 AWG 1000 V Bare

SKU CH-Z73N-R8YY3

A bare copper ring terminal crimped to 4 AWG wire for 1 000 V connections on a 3/8 in stud

  • TypeElectrical Connectors
  • Tin-plated copper ensures reliable conductivity
  • Rated for 1000 V maximum voltage
  • Fits 4 AWG wire with 0.28 in barrel ID
  • Brazed barrel construction resists separation under load
  • CSA certified and UL listed for safety compliance

3/8 in Stud Ring Terminal for 4 AWG

This 3M ring terminal is a bare copper connector rated for 1000 V and 4 AWG wire. It uses a crimp termination style with a brazed barrel design. The connector is CSA certified and UL listed for electrical installations. It suits professionals terminating building wire, fixtures or signs.

Bare Insulation and Tin-Plated Copper Contact

The terminal has no insulation coverage or material, leaving the copper barrel exposed. Its contact finish is tin over copper for corrosion resistance. Barrel dimensions are 0.28 in inside diameter and 0.47 in length. The tongue width measures 0.68 in to fit a 3/8 in stud.

Suits Single-Size Crimp Jobs at High Temperature

This terminal fits only 4 AWG conductors and operates up to 347 degrees F. It is not for installers who need multiple wire-size flexibility or insulated barrels. Buyers requiring a different stud size or a multi-wire connector should look at something else.

Highlights

  • Tin-plated copper ensures reliable conductivity
  • Rated for 1000 V maximum voltage
  • Fits 4 AWG wire with 0.28 in barrel ID
  • Brazed barrel construction resists separation under load
  • CSA certified and UL listed for safety compliance

Specifications

Brand3M
TypeElectrical Connectors

Questions about this item

Will the crimped connection on the 4 AWG barrel need re-crimping or replacement over time?

The brazed barrel construction and tin-plated copper contact are designed for a permanent crimp termination on 4 AWG wire, with no maintenance interval specified by 3M.

What is the first limit reached when running the 1,000 V rated terminal continuously?

The maximum operating temperature of 347 degrees F is the primary thermal limit for sustained operation.

How much heat does the bare copper ring terminal generate during all-day use?

Heat rise depends on the current carried through the 4 AWG conductor; the terminal itself is rated to withstand up to 347 degrees F.

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