www.91免费视频-国产98色-精品777-可以看的av网站-国产精品99蜜臀久久不卡二区-伊人精品在线-国产成人综合久久免费导航-久久思-国产精品人成电影在线观看-特级丰满少妇一级aaaa爱毛片-婷婷精品进入-国产成人av在线免播放观看更新-国产精品欧美一区二区三区不卡-亚洲欧美成人综合图区-在线欧美色

Lateral hexagonal fossa gb29.2

Lateral hexagonal fossa gb29.2
  • Product description：The external hexagon socket head screw is a screw with hexagon head, also called hexagon head screw. The standard of Chinese external hexagon socket head screw is based on Chinese standard parts, whic

Lateral hexagonal fossa gb29.2

Material: stainless steel 304316, grade 8.8 high strength and grade 12.9 high strength

Product standard:gb29.2

It can also support non-standard customization.