... BS,GB,JIS,Non-standard 3.Class:4.8,8.8,10.9,12.9 4.Surface:customers demand 1. Standards: DIN ... : Carbon steel, stainless steel, alloys steel.3. Class: 4.8,8.8,10.9,12.9.etc4. Surface: plain, zinc plated, ... panel of expressway with mechanical property of Grade 4.8 and 8.8.4. Elevator guide rail bolt and big hexagon bolt ... bolt with the mechanical property of Grade 4.8, 8.8, 10.9 and ANSI Grade 2, 5 and ...