標準號：BS 93-2008
中文標準名稱：英國協會(B.A.)螺紋.要求
英文標準名稱：British Association (B.A.) screw threads - Requirements
標準類型：J04
發布日期：2008/9/30 12:00:00
實施日期：2008/9/30 12:00:00
中國標準分類號：J04
國際標準分類號：21.040.30
引用標準：BS 919-2;BS 6528-1984
適用范圍：This British Standard specifies limits of sizes, and tolerances, for singlestart parallel screw threads of British Association (B.A.) form. It is notapplicable to screw threads associated with interference fits, such asthose on the “metal ends” of studs and in the corresponding tappedholes.This British Standard specifies the following:a) basic sizes for B.A. threads, sizes 0 B.A. to 16 B.A.;b) limits of size, and tolerances, for close class and normal classexternal threads of sizes 0 B.A. to 10 B.A.;c) limits of size, and tolerances, for normal class external threads ofsizes 11 B.A. to 16 B.A.;d) limits of size, and tolerances, for a single class of internal threadsof sizes 0 B.A. to 16 B.A.