BS 1580-3-2007 统一标准螺纹.第3部分:直径小于1/4 in的螺纹.要求

标准号：BS 1580-3-2007
中文标准名称：统一标准螺纹.第3部分:直径小于1/4 in的螺纹.要求
英文标准名称：Unified screw threads - Part 3:Screw threads with diameters below 1/4 in - Requirements
标准类型：J04
发布日期：2007/12/31 12:00:00
实施日期：2007/12/31 12:00:00
中国标准分类号：J04
国际标准分类号：21.040.20
引用标准：BS 919-1-2007;BS 1580-1-2007;BS 1981;BS 6528-1984
适用范围：This part of BS 1580 specifies limits of sizes, and tolerances, forsingle-start, clearance-fit unified screw threads, in inch units withdiameters 1/4 below in.This part of BS 1580 specifies unified screw threads fromNumber 0 (0.060 in diameter) to Number 12 (0.216 in diameter),known as the “numbered sizes” in the following standard series:• a coarse thread (UNC) series;• a fine thread (UNF) series;• for Number 12 threads, an extra fine (UNEF) 32 threads per inchdiameter/pitch combination.NOTE Unified screw threads below 1/4 in diameter for attachmentpurposes and for general use in the aircraft industry are specified inAnnex A.