Detailed Product Description T-Head bolt / T-boltNon-standard Bolt Product Introdcution : 1) Size: M3-M56 2) Material: Carbid steel, stainless steel, brass 3) Grade: 4.6 - 10.9, 304(A2-70),316(A4-80) 4) Surface: Black, Zinc Plated, Yellow Zinc Plated,Dacroment... 5) Packing: bulk, box packing, Carton, Pallet 6) Standards:according to the customers' drawing or samples