Sta-Kon RAX43 INSNYL RING TERM, 26-24, No4, YELLO

The RAX43 is sized for 26-24 AWG stranded copper wire, which is the smallest of the common control and signal gauges. Yellow insulation is the color code Sta-Kon uses on this 26-24 AWG range, so don't assume yellow means the usual 12-10 AWG you see on other brands' barrels. If your conductor is 22 AWG or larger, this barrel won't grip it properly and you need a different terminal.

The ring tongue is sized for a No. 4 stud or screw. It will slip over a #4 screw on a terminal block, ground lug, or device post. A #6 or larger screw will not pass through the ring, and on a smaller post the ring will be loose under the screw head.

Yes, the nylon insulation on the RAX43 carries a 600 V rating, so it is usable on standard line voltage control wiring as well as low voltage signal runs. The nylon sleeve also gives better abrasion and crush resistance than a vinyl sleeve on the same barrel.

A ring terminal like the RAX43 has to be unscrewed completely to come off, so the connection can't vibrate loose or slip out from under a backed-off screw. That is why ring terminals are specified on motor leads, ground studs, and anything in a vibrating or safety-critical location. A spade (fork) terminal installs faster because it slides in sideways without removing the screw, which is why panel builders use them where they expect to service the block. For 26-24 AWG control wire on a #4 screw, use the ring if the panel sees vibration and the fork if it does not.

No. The RAX43 barrel is copper and is intended for copper conductors only. Aluminum wire needs an AL-rated or AL/CU dual-rated connector with the appropriate inhibitor compound; putting aluminum in a copper-only barrel creates a galvanic corrosion problem at the joint.

Use a ratcheting insulated-terminal crimp tool matched to the 26-24 AWG color code. Pliers deform the barrel without compressing the copper strands evenly, which leaves a high resistance joint that heats up. At 26-24 AWG the wire is small enough that an undercrimped barrel will also pull out under very little force.

Country of origin on the RAX43 is the United States. For government, institutional, or federally funded work with domestic sourcing language in the spec, that is the detail procurement usually needs on the submittal.