The 1LK00100 is a mounting hardware kit from celduc relais, providing a selection of fasteners for various installation needs. The kit includes M4x10 and M3x8 pan head screws with captive washers, an M4x20 socket head cap screw with an integrated washer, and an M4x12 TORX screw. A 7x7 mm M4 square nut is also supplied to complete the assembly. This comprehensive set is designed for securely mounting components like solid-state relays.