1). Material: Carbon steel / Stainless steel
2). Grade: Class 4.8 / class 6.8 / class 8.8 / class 10.9
3). Drive: Phil / pozi / torx / slotted / square / hexagon socket, etc
4). Thread: Type-C, Type-T, UNC or UNF, CSD, Type-TT, etc
5). Point: Machine
6). Surface Treatment: Zinc plated / ruspert / phosphated / painted / plain, etc
7). Package: Small package or bulk, according to customers' requirement
8). Standard: DIN / ANSI / JIS / IFI
9). Size: 1/4#-3/8#, 4-100mm