CHA-440 Concealed-Head Studs Inserts for Pcb Threaded Rods Sheet Metal PEM Stud

3000Pcs CHA-440-4/6/8/10/12/16 Concealed-Head Studs Self-clinching Stud Pin Screw Spacers for Pcb Spacer Screws Sheet Metal Vis Tornillos Parafuso Aluminum PEM Standand factory wholesale The fastener head is locked securely in a blind,milled h…