平键1GB/T 1095-2003平键 键槽的剖面尺寸 Square and Rectangular keyways2GB/T 1096-2003普通型 平键 Square and rectangular keys3GB/T 1097-2003导向型 平键 Square and rectangular keys4GB/T 1566-2003薄型平键 键槽的剖面尺寸 Square and Rectangular thin keyways5GB/T 1567-2003薄型 平键 Square and rectangular thin keys螺栓1GB/T 10-1988沉头方颈螺栓 Flat countersunk square neck bolts2GB/T 11-1988沉头带榫螺栓 Flat countersunk nib bolts3GB/T 12-1988半圆头方颈螺栓 Cup head square neck bolts4GB/T 1228-1991钢结构用高强度大六角头螺栓 High strength bolts with large hexagon head for steel structures5GB/T 1231-1991钢结构用高强度大六角头螺栓、大六角螺母、垫圈技术条件 Specifications of high strength bolts with large hexagon head, large hexagon nuts,plain washers for steel structures6GB/T 12869-1991机床夹具零件及部件 双头螺栓 The parts and units of jigs and fixtures--Double end stud7GB/T 12870-1991机床夹具零件及部件 槽用螺栓 The parts