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Bulk pack of 200 copper ring terminals with 3/8 inch stud holes

3M

3M M6-38RK 6 AWG Non-Insulated Ring Terminal 3/8" Stud Pack of 200

SKU CH-55KX-A3PGY

Connects 6 AWG wire to a 3/8" stud with a brazed-seam copper ring terminal rated 600 V and 347 °F, supplied in a 200-piece pack

  • Handles 600 V circuits with UL-listed safety
  • Withstands 347 °F heat for harsh environments
  • Brazed-seam copper resists vibration and pull-out
  • 3/8 in stud fits common automotive terminals
  • 200-piece pack covers large wiring jobs

6 AWG Ring Terminal 3/8" Stud

The 3M M6-38RK is a non-insulated ring terminal built for 6 AWG wire and a 3/8 inch stud. It comes in a pack of 200 pieces for high-volume wiring work. The copper connector has a brazed seam and a bare finish. It is CSA certified and UL listed for 600 volts.

Installers needing bare copper crimp lugs

Electricians and panel builders who need a secure crimp connection on 6 AWG cable will find these terminals fit the stud size and current rating. Buyers who require insulated barrels, a different stud diameter, or a smaller wire gauge should look at other connector types. The bare metal design suits controlled environments where insulation is added separately.

Brazed seam holds under continuous 600 V load

The brazed seam construction prevents the barrel from splitting when the joint carries full rated current over long periods. Copper material keeps resistance low so the connection stays cool at the 347 degree Fahrenheit maximum temperature. The 1.22 inch overall length and .63 inch tongue width give a stable mechanical fit on the 3/8 inch stud. Crimp termination creates a permanent bond that resists vibration.

How it compares

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Price $210.99
Pricier than about 91% of the 1,040 comparable items (median $13.99).

Specifications

Product
Brand name3M

Questions about this item

What crimp tool do I need for the 6 AWG copper barrel on these ring terminals?

Use a ratchet crimper with a 6 AWG die that produces a full‑cycle indent on the brazed seam barrel; the tool must compress the copper evenly so the joint meets the 600 V rating.

Will the 3/8 in stud hole and .63 in tongue width fit the existing bus bar bolts in my panel?

The 3/8 in stud size and .63 in tongue width match standard 3/8 in bolts; verify bolt diameter and clearance before installation to ensure the tongue seats flat.

How can I confirm each crimped terminal is sound after assembly?

Perform a pull‑test on a sample from the 200‑pack and inspect for a uniform crimp imprint with no wire strand exposure; the joint should withstand the rated 347 °F operating temperature.

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