... ,18mm,20mm,22mm,24mm,27mm,30mm .etcShape:round,half-round,square,flat round,flat half-round, flat squareThread pitch: 1.5mm ... brandMaterial: mild steel,1035steel,1045steel,5140steelSurface protection: paint, black oxide, zinc plated, phosphate, electrophoresis, polishing etc.Satisfaction Service:1.we can produce ...