Sta-Kon RB2237U INS VINYL LK FORK 18-14 1/4 90 DEG

The RB2237U is sized for 18-14 AWG stranded or solid copper conductor. Anything heavier than 14 AWG will not seat in the barrel, and wire smaller than 18 AWG can pull out of the crimp even when the insulation grips, so step down to a 22-16 AWG terminal for those runs.

The RB2237U is a flag style, with the fork turned 90 degrees to the wire barrel. That lets the conductor run parallel to the terminal strip or out the side of a tight enclosure instead of straight into the screw, so you avoid a hard bend at the lug in shallow panels and behind control components. If your wire approaches the screw head-on, use a straight fork instead.

The tines on a locking fork are formed with upturned tips that catch under the screw head, so the terminal resists backing off the stud if the screw loosens from vibration. A plain spade will slide straight out sideways. On vibrating equipment, control panels, and motor circuits that difference is the reason to spec the locking version.

Country of origin on the RB2237U is the United States, which is what institutional and government procurement needs on record for domestic-content requirements. Order it by manufacturer part number RB2237U.

The sleeve is vinyl, which is the standard insulated terminal material for general panel and control wiring. Vinyl is softer than nylon, so for high-heat locations or installs where the barrel gets dragged through conduit and fittings, a nylon insulated fork holds up better.

Blue is the color code for the mid wire range, and on the RB2237U it corresponds to its 18-14 AWG capacity. If you are sorting a bin on the truck, blue sleeves are your 18-14 terminals, red is the smaller range and yellow the larger.

Yes. An insulated vinyl terminal in the 18-14 AWG range wants an insulated-barrel crimp die, not the open-barrel nest used for non-insulated lugs. Crimping on the wrong nest splits the vinyl and leaves the conductor loose. Terminals are sold separately from tooling.