Plasti-Grip ring terminal for 14-16 AWG
The 2-342143-1 is the blue M4-stud member of TE's Plasti-Grip ring terminal line, accepting 14-16 AWG wire with a tin-plated copper contact and serrated crimp barrel. The PVC insulation sleeve covers 0.118" to 0.193" insulation diameter, and the serrated barrel bites through surface oxides during crimping for a gas-tight connection on stranded wire.
What the insulation sleeve covers
The blue PVC sleeve accepts wire insulation diameters from 0.118" to 0.193" — the lower bound matches 16 AWG thin-wall insulation; the upper bound covers 14 AWG heavy-wall jacket common in industrial control panels.