邓工找给我 M1.6*7 的铜螺母
https://item.taobao.com/item.htm?spm=a230r.1.14.16.58516e54PP3pxW&id=39818619582&ns=1&abbucket=20#detail
冯杰贞找的，很便宜的
https://item.taobao.com/item.htm?spm=a230r.1.14.31.65bd55836EMXHx&id=544767547960&ns=1&abbucket=2#detail
M1.2 的铜螺母
https://detail.tmall.com/item.htm?spm=a230r.1.14.27.265f1b47OJ4y9n&id=617677829180&ns=1&abbucket=2&skuId=4528548786559
