Home / Standards / GB 5276-85 GB 5276-85 Fasteners—Designation symbols and dimensions for bolts, screws, studs and nuts 紧固件 螺栓、螺钉、螺柱及螺母尺寸代号和标注 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A