Titanium Nylock Hex Flange Nut M8 - 1.25 Thread Pitch. Nut Height = 11mm. Flange OD = 16mm. These are a machined hex flange nut made from Grade 5 Titanium. Always use a small dab of moly grease or assembly paste when installing these nuts. Min. UTS 140Ksi (925Mpa).