Sta-Kon F4003 INS PP OLD DIN FERRULE 16AWG 1.5MM2

The F4003 wire ferrule is sized for 16 AWG conductor, which is the 1.5 mm2 metric equivalent called out in the part description. Use it on stranded 16 AWG control or panel wire going into a screw or spring-cage terminal; a larger or smaller conductor will either not enter the barrel or will crimp loose.

Red is the color-code for 1.5 mm2 under the DIN ferrule color scheme, and the F4003 follows it: the insulating collar is red and the barrel is sized for 16 AWG / 1.5 mm2. On a panel where techs pick ferrules by color, that makes the red one unambiguous. Still confirm the conductor, since color conventions only hold within the DIN system.

Sta-Kon F4003 is an old-DIN pattern ferrule, meaning the barrel follows the earlier DIN ferrule sizing rather than the revised series. Barrel length differs between the two patterns at the same conductor size, so if your terminal depth or your crimp die set was specified around one pattern, match it. For a panel already populated with old-DIN ferrules, this is the one that keeps the strip consistent.

Yes, a ferrule crimper. Insulated ferrules are crimped with a four-indent or hex ferrule die that compresses the copper barrel through the plastic collar; standard insulated-terminal pliers for ring and fork lugs will not form the barrel correctly. Set the tool for the 1.5 mm2 / 16 AWG position.

The crimp barrel is copper, which is what gives you a low-resistance termination on stranded wire, and the collar is polypropylene. Polypropylene is the standard insulating material on DIN ferrules and is suited to normal control-panel service; it is not a high-temperature engineering plastic, so for terminations sitting against a heat source choose a ferrule specified for that temperature instead.

Order it as Sta-Kon F4003. It is manufactured in Germany, which matters if your project paperwork requires country-of-origin declarations on electrical components.

A crimped ferrule gathers the strands into a solid pin so nothing frays out under the screw, the clamping pressure stays on the conductor instead of flattening individual strands, and the termination does not loosen as the strands relax. The F4003 handles that for 16 AWG stranded wire, with a red polypropylene collar that also acts as a strain relief at the insulation edge.