Description:

Thread Size: M4 x 40mm/M4 x 1.57"(Thread.Dia x Total.L). Head: Flat Head, Drive Type: Phillips, Quantity: 100 pcs. Made of carbon steel for high hardness and strength. Zinc color plated finishes for corrosion and resistance.. The threaded design can screw into the hardwood faster and reduce the cracking problem, for wood and fiberboard are the good replacement.. Widely used in electronics, communication, electric power products, cultural goods, floorboard fastening applications, etc..