It is good to have reference numbers while talking about specifications. Sample specifications of a self-tapping screw by SME group listed below.
* Typical length range (6.5mm to 150mm)
* Thread specifications: Form F, Form C, Type A, Type B, Type AB, Type U, Type C, etc.
* Head types: Flange, Index Hex, Round washer, Oval, Flat, Truss
* Standards Adhered: ISI, ANSI, ASTM, IFI, DIN, JIS, BS, AS, ETC.
* Thread count: 5 to 20