Standard:GB ISO DIN Material:Carbon steel,Stainless steel,Cu,Al Our products are good in ... . This is the information of the product: 1.The length:14±0.2 2.The tooth:M24 3.Head width:24 ... ±0.2 turning parts1. Material: carbon steel, stainless steel, aluminum, copper, or according to the customer ... inquires will be highly appreciated and given the best attention. Carbon steel nuts