標(biāo)準(zhǔn)號(hào)：ANSI/ASME B18.3.5M-1986
中文標(biāo)準(zhǔn)名稱：米制系列六角扁平沉頭螺釘
英文標(biāo)準(zhǔn)名稱：Hexagon Socket Flat Countersunk Head Cap Screws (Metric Series)
標(biāo)準(zhǔn)類型：J13
發(fā)布日期：1986/1/1 12:00:00
實(shí)施日期：1999/12/31 12:00:00
中國(guó)標(biāo)準(zhǔn)分類號(hào)：J13
國(guó)際標(biāo)準(zhǔn)分類號(hào)：21.060.10
適用范圍：Contains complete general and dimensional requirements for Metric Series Hexagon Socket Flat Countersunk Head Cap Screws of nominal sizes from 3mm to 20mm recognized as American National Standard. Also included are appendices covering formulas for dimensions, part numbering system and preferred sizes for government use, and thread dimensions. This product is designed and recommended for applications where a flush seating socket head screw is desired. Wrenchability is limited by the socket size and key engagement. Because of the head configuration, this product is not recommended where maximum fatigue resistance is required.