Descrizione Allen Screw for Emulsion: after several disappointing tests with commercial screws, we decided to design and produce our own Allen screw for V2 Shock Caps. Specifications: - Material: Alloy steel with strength class 12.9 (1200 N/mm²) - Coating: Nickel - Design: we designed a groove at the end of the thread, so a small 0.6mm section O-ring can fit. This O-ring, compressing, will create a seal between the screw and the hole. Zero air or oil leaks guaranteed.