CHC-M3 Concealed-Head Studs Inserts for Pcb Threaded Rods Sheet Metal PEM Stud

3000Pcs CHC-M3-4/6/8/10/12/16/20 Concealed-Head Studs Self-clinching Stud Pin Screw Spacers for Pcb Spacer Screws Sheet Metal Vis Tornillos Parafuso PEM Standand PEM Standard factory wholesale The fastener head is locked securely in a blind,mi…