Sta-Kon RC1337M INS VIN FRK TRM 12-10 No6 YEL MYLAR

The RC1337M is sized for 12-10 AWG stranded wire. The yellow insulation is the standard color code for that range, so on a panel where blue barrels mean 16-14 and red mean 22-16, yellow tells you at a glance you are on the heavier gauge. Do not crimp a 14 AWG conductor in it, the barrel will not grip reliably.

Yes, the RC1337M fork is cut for a No. 6 stud or screw. The open-tongue shape slides in under a loosened No. 6 terminal screw without pulling the screw all the way out, which is why electricians use forks on dense terminal strips and control panels instead of ring terminals.

A fork terminal like the RC1337M goes on and off without removing the screw, so it is the faster choice on terminal strips, relay bases, and anywhere you expect to service or re-pull conductors. A ring terminal is the better call on a stud that sees vibration or where a code or spec calls for a captive connection, since a fork can slip out if the screw backs off. Both carry the same 12-10 AWG wire range in the yellow color code.

Order Sta-Kon RC1337M. That is the manufacturer part number for the vinyl insulated, Mylar-lined fork terminal in yellow for 12-10 AWG wire with a No. 6 stud opening.

The RC1337M is a vinyl insulated fork terminal with a Mylar-lined barrel. The Mylar sleeve sits between the vinyl and the metal barrel to reinforce it, so the insulation resists splitting or flagging when the crimp tool compresses it. Functionally you still handle it as a standard vinyl insulated terminal for 12-10 AWG.

Use an insulated-terminal crimp tool with the yellow 12-10 AWG nest. Insulated barrel terminals are rated on the assumption the barrel is compressed in a matched die, so a bare-terminal or general-purpose plier crimp will not give a reliable pull-out strength on the RC1337M.