20pcs M6 ( 6mm ) High Tensile 10.9 Socket Button Head Screws Black Self Colour Bolts M6 Socket Button Head Screws , High Tensile Grade 10.9 , ** NOTE : Stainless bolts are not recommended for replacing high tensile bolts. & ** All threaded full length Application For high stress applications or for when a high strength fastener is required. ** Screw Length Does Not Include Head Dimensions of screws : Tensile Strength 10.9 Head Type : Socket Button Head , Head Diameter : 10.5mm , Head Height : 3.3mm , Thread Diameter : 6mm , Thread Pitch : 1.0mm , Allen Key/ Wrench Size : 4mm It's brand new, good quality & high performance. ** Please check & Making sure the accurate size before placing order. Free Shipping & the deliver time to USA is approx. 10-18 days after the shipment date.