有没有懂五金的好兄弟帮我看看这是啥规格型号的螺丝钉?

Behind-avatar

Behind

2020-08-10T10:23:19+00:00

电脑椅固定靠背的,老是掉下来,拧不紧了,因为质量太次屁股上六角里面的凹槽已经磨平的了,我要去买一包新的。

[img]https://img.nga.178.com/attachments/mon_202008/16/-7Q5-16n8K1hT3cSlc-sg.jpg.medium.jpg[/img][img]https://img.nga.178.com/attachments/mon_202008/16/-7Q5-40cK1sT3cSlc-sg.jpg.medium.jpg[/img]