Can I Use a Standard RJ45 Plug With Shielded Ethernet Cable?

Use the correct connector for the cable instead of forcing a smaller plug onto it. Also check whether the cable has solid or stranded conductors, since many plugs are designed for only one type. For permanent wiring, terminating the cable on a compatible keystone jack or patch panel is often easier; use suitable patch cables when you need an RJ45 plug on the end.

The issue is probably the cable category and conductor size, not simply whether it is shielded. Cat6 and especially Cat6A cable can use larger conductors than Cat5e, so a passthrough plug made for smaller cable may not fit. Use an RJ45 plug rated for the cable’s category, conductor diameter, and solid or stranded construction. Don’t remove the shielding just to make the plug fit; use a shielded connector when the cable is shielded and terminate the drain or foil as the connector instructions specify.

Passthrough plugs are a separate connector design, not the definition of a normal UTP plug. They can work reliably when the plug and crimp tool are matched to the cable, but the contacts and wire openings still need to support the conductor size. Some are intended for Cat5e only, while others support Cat6 or larger conductors. Check the manufacturer’s specifications rather than relying on appearance.