Thomas & Betts, RB873 Yes Ring Terminal

The ABB RB873 are nylon insulated large ring terminal. Self-insulated with high dielectric-strength nylon sleeves. An inner bronze insulation grip sleeve lengthens the flexing radius of the conductor and eliminates conductor creep. The wire range is 18-14 AWG. The length 0.89 inches, width 0.31 inches and maximum insulation of 0.162 inch.

Bolt hole size 10
Material is tin plated copper with blue insulation