Platte River 123425, Fasteners, Knock Down (kd), 3/8-16 Threaded Brass Inserts, 10-pack Easily add machine threads to wooden parts. Specifications: Barrel Length=5/8 in, Finish=BRASS, Material=BRASS Specifications: Outside Diameter=.594 in, Threads=3/8-16, Pilot Hole=1/2 in