Features and Application: For Plastic vary from communication equipment, the automotive industry, computer industry, and anywhere where strong durable threads are required in plastics. Brass Hexagonal Insert with blade-like self tapping external thread designed to reduce installation forces into harder materials. It can be molded / plotted-in. Brass Hexagonal Inserts give high tensile strength, excellent resistance to corrosion and good electrical conductivity. Available unheaded, headed and reverse headed. Imperial thread sizes and studded versions also available.