1423126 is the item number for the Bossard Wingnut Short Twin-Arm Knob, which is composed of four components—knob body, mounting plate, 2x twin-arm, and self-tapping twin-thread screw—needed for quick, simple assembly. The wing nut knob is designed for aluminum panels between 1mm and 3mm thick and is available in three colors: black, silver, and fluorescent orange. The body is made from die-cast zinc, the mounting plate is steel, the twin arms are stainless steel, and the screws are made from high-grade stainless steel. The product is designed for the defense, agricultural, and automotive industries and is a reliable, cost-effective way to mount components to panels.