TE Connectivity FASTIN FASTON Series 187 Quick Connect Receptacle Crimp Terminals FASTIN FASTON 187 series quick connect straight crimp receptacles designed for quick and efficient connection and reliability. These FASTIN FASTON 187 receptacle terminals have a locking lance that ensures secure retention when snapped into housings and a step down insulation support barrel to enable the axial alignment of conductor strands to be maintained. Tapering walls at the rear of these FASTIN FASTON 187 receptacles prevent over insertion of shoulderless tabs. The "F" style crimp terminations of these FASTIN FASTON 187 series quick connect straight receptacles enable stable electrical and mechanical performance as well as resistance to vibration and corrosion