The HELI-COIL A3585-4CN500 is a stainless steel screw-locking insert designed to provide enhanced thread retention in critical applications exposed to vibration, shock, or torque. This insert features a 1/4-20 UNC thread size and a 0.5-inch overall length, offering a length-to-diameter ratio of 2D for superior gripping strength. Its tangless design eliminates the need for tang break-off and retrieval, reducing the risk of foreign object debris (FOD) in sensitive environments. The bright finish and Grade 304 stainless steel construction ensure corrosion resistance and durability, making it suitable for various industries, including automotive, aerospace, military, and defense. The insert's self-locking functionality provides reliable performance in demanding applications where traditional fasteners may fail.