M30x1.5mm Retaining Four-Slot Slotted Round Nuts 4 Pcs - Operated with hook spanners (not included here). - Widely used for roller bearing, axial shaft, pump valve, etc. - The pitch and spiral angle of the fine thread is smaller, which is more conducive to the self-locking, so the fine thread are generally used in places where it is necessary to prevent loosening. Shaft Retaining Nut M24x1.5mm - Retaining Four Slot Slotted Round Nuts-304 Stainless Steel 2Pcs Round Slotted Nut 4 Slot The pitch and spiral angle of the fine thread is smaller, which is more conducive to the self-locking, so the fine thread are generally used in places where it is necessary to prevent loosening. - Design with thread inside, 4-slot slotted round nut. - Operated with hook spanners (not included here [DIMENSION] - (42mm) outer diameter, (10mm) height. - Made of carbon steel, oxidized black finished, good rust and corrosion resistance. M24-1.5 Spndle Castle / Slotted Nuts M24x1.5 Nut 24mm x 1.5 Nut M24 x [APPLICATION] - Widely used for roller bearing, axial shaft, pump valve, etc.