Screw, Cap, Socket Head Undrilled and Drilled, Plain and Self-Locking Alloy Steel, Corrosion-Resistant Steel and Heat-Resistant Steel, UNRF-3A Rev. 9
国外标准现行
标准号:AIA/NAS NAS 1351-1996
标准名称: Rev. 9UNRF-3A抗腐蚀及防热钢合金钢自锁普通及钻孔及非钻孔套筒扳手头螺帽
英文名称:Screw, Cap, Socket Head Undrilled and Drilled, Plain and Self-Locking Alloy Steel, Corrosion-Resistant Steel and Heat-Resistant Steel, UNRF-3A Rev. 9