The DEWALT DCE31004CU #4 Copper U-Die Set is a crimping die set made for copper connector work with the DEWALT DCE310 20V MAX Compact Crimper. This is a U-die set designed for crimping #4 AWG copper connectors. Model Number: DCE31004CU. If you already run the DCE310 platform and need the correct die for #4 copper terminations, this is the job-specific accessory that gets you there.

What makes this die set matter is not just fitment, but output. Used with the DCE310 compact crimper, it is built to complete UL Classified crimps with leading manufacturers' connectors, which is the kind of detail electricians and serious installers actually care about. The wire size is imprinted onto the connector after the crimp cycle, so the finished connection is easier to verify during inspection or troubleshooting.

DEWALT also kept the day-to-day handling practical. The laser-etched markings and industry-standard color coding help you identify the die size quickly, especially when multiple dies are in the bag or on the cart. That sounds small until you're switching between connector sizes in the middle of a service call or trim-out and do not want to lose time checking every piece by hand.

As an accessory, this is purpose-built rather than universal. That is a good thing if you want predictable results. A dedicated #4 copper U-die set gives you the correct profile for the intended conductor size and connector application, instead of forcing a close-enough setup that can create rework later. For crimping accessories, exact match is the whole game.

In real use, this product is best for electricians, utility crews, maintenance teams, and contractors doing cable termination work where clean, repeatable crimp results matter. It is not a standalone tool and it is not a general-use hand crimper accessory meant to fit anything on the truck. It is a DEWALT system accessory for users who already own or plan to use the DCE310 compact crimper and need the correct die set for #4 copper applications.

DEWALT DCE31004CU #4 Copper U-Die Set for electricians who need the right crimp the first time

This is the kind of accessory that does not look flashy, but it is exactly what keeps a crimping system useful in the field.

• Who it's for: Electricians and contractors already using the DEWALT DCE310 compact crimper for copper termination work.
• Why it stands out: It is size-specific, clearly marked, and built to produce UL Classified crimps with leading manufacturers' connectors when used as intended.
• Worth knowing: This is not a universal die and it is not a standalone tool. Make sure your connector and crimper setup matches the DEWALT chart before you buy.

• What tool does this die set fit? It is designed for use with the DEWALT DCE310 20V MAX Compact Crimper.
• What conductor size is this die for? This die set is for #4 AWG copper applications.
• Does it help with post-crimp inspection? Yes. It imprints the wire size onto the connector after a completed crimp cycle.