Thread Forming Screws - Pozidrive Countersunk

A countersunk head is usually used when no part of the fastener head is required to be protruding above the level of the substrate. Countersunk heads can also be recessed and filled over if a hidden fixing is required. Usually abbreviated to CSK.

Thread forming screws are also commonly called taptites or tritap screws, or sometimes thread rolling screws. They are used to form threads during insertion, usually in metal, to eliminate the need for thread tapping as a separate process.

Thread forming screws are manufactured from case hardened steel and are zinc plated. They have what is called a trilobular thread pattern – which actually means three lobes, signifying a shape that is “triangle-round”. This unusual thread pattern reduces friction as the thread is being formed, and adds resistance to vibration.

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