Sta-Kon F2024 INS PP FERRULE 18, .75 MM2, LG .55

The F2024 wire ferrule is sized for 18 AWG stranded wire, which is the 0.75 mm2 metric equivalent called out in its description. If your conductor is 16 AWG or larger, you need the next ferrule size up, not this one - a crimped ferrule only holds properly when the barrel matches the conductor cross section.

It carries UL file E489056. That is the listing reference an inspector or panel shop QC will want when terminating control wiring with ferrules in a UL panel build.

A crimped ferrule gathers the strands into a solid pin, so nothing frays out past the terminal, no stray strand shorts to the adjacent point, and the screw or cage clamp bears on the copper barrel instead of crushing individual strands. For 18 AWG control wiring in a densely packed enclosure that is usually the difference between a joint that holds torque and one that backs out. If you are terminating onto a stud or screw rather than into a clamping chamber, a ring or fork tongue terminal is the right part instead.

Grey is the size code. On insulated wire ferrules the insulating collar is color keyed to the conductor cross section, so the grey collar on the F2024 identifies it as the 0.75 mm2 (18 AWG) size on a panel where several sizes are in use. It helps an electrician verify the right ferrule went on the right conductor after the fact, without measuring.

The barrel is copper with a polypropylene insulating collar, so it is intended for copper stranded conductors only. Crimping a copper ferrule onto aluminum wire creates a dissimilar metal joint that corrodes and loosens over time - for aluminum you need a connector rated for aluminum, typically AL9CU marked.

Yes. Insulated ferrules need a ferrule crimper with a square, trapezoidal or hex die sized for 0.75 mm2 - a standard insulated-terminal plier with oval jaws will deform the collar and give an unreliable compression. Set the tool to the 0.75 mm2 / 18 AWG station.

It is Sta-Kon part F2024, an insulated polypropylene ferrule for 18 AWG / 0.75 mm2 wire, grey collar, 0.55 barrel length, made in Germany. Order by F2024 - the size suffix is what distinguishes it from the adjacent cross sections in the series.