Sta-Kon RAS18-10FLX HEATSHR LKG FORK TERM, 22-18, No10,

The RAS18-10FLX takes 22 to 18 AWG stranded or solid copper conductor. That is the red insulation color code, which is how you spot it in a mixed bin of terminals. If you are landing 16-14 AWG, this is the wrong barrel size and the crimp will not hold.

It is sized for a No. 10 stud or screw. The fork slides under a partially backed-off No. 10 terminal screw rather than requiring you to remove the screw entirely, which is why these get used on crowded terminal strips and control panel blocks.

Yes. The terminal is rated 600 V, which covers 120, 208, 240, 277 and 480 V circuits found in commercial panels and motor control. Conductor size is the limit here, not voltage: it only accepts 22-18 AWG, so it suits control and signal wiring rather than power feeders.

The insulation sleeve on this Sta-Kon terminal is heat shrinkable, so after crimping you hit it with a heat gun and it tightens down over the barrel and onto the wire jacket. That gives you strain relief at the crimp and seals the entry point against moisture, which is the reason to pick this over a plain vinyl-insulated fork in wet locations, outdoor enclosures, or vibrating equipment.

A ring terminal is the more secure choice because the screw has to come all the way out to lose the connection, and many specs require rings on vibrating or safety-critical connections. The locking fork, like this Sta-Kon No. 10 unit, exists for speed and access: you back the screw off a couple of turns and slide it in, which matters when you are landing dozens of control conductors on a dense block or working behind equipment you cannot fully remove. The locking tangs on the fork resist backing out under a tightened screw head.

The barrel is copper, so it is for copper conductors only. Do not crimp it onto aluminum wire, that needs a terminal rated AL/CU with the appropriate inhibitor compound.

The manufacturer part number is RAS18-10FLX from Sta-Kon. Match on three things when you compare to what is in the panel: red insulation (22-18 AWG range), No. 10 stud size, and a heat shrink rather than a vinyl sleeve. If the existing terminals are blue, they are a 16-14 AWG barrel and this will not be the same part.

Country of origin on the RAS18-10FLX is the United States, which is the detail Buy American and domestic-preference procurement reviewers ask for on electrical terminations.