- Made of carbon steel, oxidized black finished, good rust and corrosion resistance.- 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).- Widely used for roller bearing, axial shaft, pump valve, etc. Specification:Material: Carbon SteelFinish: Oxidized blackThread Size: M20x1.5mmType: Fine ThreadOuter Diameter: 34mm / 1.34"Height: 8mm / 0.31" Package Content: 2 x Slotted Nuts.
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