The male board connectors are also available in 2-, 3-, and 4-contact single row options for vertical PCB through-board mounting with 4.5 mm or 5.9 mm PC tail terminations. They also display a contact number 1 marker and are supplied in tubes with pick-and-place caps fitted. Standard gender fixings have a 5.2 mm or 6.6 mm long board mount stud for additional security on the PCB. The slotted nut KA1-4240000 is available separately for use with these. Reverse-fix has floating hex socket screws, which will require a clearance hole in the PCB.