Sta-Kon B87U BARE TUBULAR RING TERM 90 DEG 18-14

The B87U is sized for 18 to 14 AWG stranded copper wire, which covers the usual control, fixture whip, and low-voltage pull sizes. Anything heavier than 14 AWG will not seat in the barrel, so step up to a larger terminal for 12 AWG and above.

It is a bare, non-insulated terminal, so the barrel and the crimp are exposed metal. If the termination sits in a crowded box, on a terminal block near other live parts, or anywhere it could touch an adjacent conductor or a grounded enclosure wall, plan on heat shrink or an insulating cap. In an enclosed device or where creepage is already controlled, bare is normally what the spec calls for.

The ring sits at a right angle to the wire barrel instead of in line with it. That lets the conductor come at the stud from the side and still land flat under the screw, which is how you keep a short tail in a shallow box, a motor terminal, or a panel ground bar without putting a sharp stress bend in the wire right at the crimp. If your wire already runs straight at the stud, use a straight ring terminal instead.

A ring terminal is the closed-barrel choice: the screw has to come out to install or remove it, which is why inspectors and spec writers prefer rings on grounds and on any connection that gets vibration. A fork or spade slips on and off with the screw only loosened, which is faster for service work but can back off. The B87U is the ring version with the ring turned 90 degrees to the wire.

It is a tubular barrel terminal, so it wants a proper crimper with a die matched to the 18-14 AWG range, not pliers. A nest-and-indenter or a standard 18-14 color-free die position gives the full-circumference compression the barrel is designed for. A flattened or partial crimp on a bare copper barrel is the most common cause of a hot joint here.

Copper, bare with no plating called out, which is the standard material for a crimp barrel because it takes the cold-weld compression without cracking and keeps resistance low across the joint.