为适用于模型工程的配件和安装件建立了一系列公制螺纹和紧固件，以及一系列公制连接螺纹，这些配件和安装件在具有比例外观的同时，确保螺纹紧固件和连接件具有足够的强度。交叉引用:BS 3643:第1BS 3643部分:第2BS 3692BS 4183BS 4827PD 6494部分

Establishes a range of metric screw threads and fasteners and a range of metric attachment threads for fittings and mountings suitable for application in model engineering which, whilst of scale appearance, ensure adequate strength of threaded fasteners and attachments.Cross References:BS 3643:Part 1BS 3643:Part 2BS 3692BS 4183BS 4827PD 6494