Locking devices, Twist-Lock®, industrial, female Insulgrip® connector body, 30 A 3-phase 250 VAC, 3-pole 4-wire grounding, NEMA L15-30R, screw terminal, black and white nylon. Superior cord grip design protects terminations from excess strain. Clear, funnel shaped wire entry for ease of termination. Integral dust shield protects wiring chamber from dust or contaminants.