Features and Application: For Plastic vary from communication equipment, the automotive industry, computer industry, and anywhere where strong durable threads are required in plastics. Threads as per International Go & Not Go Standards. Deep Groove for maximum Pull Out Resistance. Inner Diameter (I/D) after Threads with very close tolerance to prevent unnecessary flush to enter into the inserts. Available unheaded, headed and reverse headed. Imperial thread sizes and studded versions also available.