日日av网,九九九九老司机,av男人天堂一区,国产制服日韩欧美,色婷婷二区,色999综合,在线视频不卡视频,国产日韩欧美精品一区,色婷婷一区二区三区四

Types and Applicable Occasions of Non Standard Screws from Screw Manufacturers

Types and applications of non-standard screws:

Non-standard screw

(1) Embedded screws are mainly used for hanging and fixing air conditioning pipes, water pipes, electrical pipes, ceilings, etc.

(2) Twisted flat head non-standard screws can be used on cement concrete, brick walls, and hollow bricks to fix bathroom equipment.

(3) Internal forced non standard screws with internal teeth, used for fixing marble, water pipes, electric pipes, and angle iron.

(4) Sleeve type non-standard screws are mainly used for fixing soundproof walls and bathroom equipment.

(5) External forced internal teeth non-standard screws are mainly used for hanging pipes of water pipes, electrical pipes, air conditioners, as well as fixing various angle irons and steel sections.

(6) Twisted sleeve non-standard screws are used for fixing lighting fixtures, light steel dragon frames, and bathroom equipment.

(7) Hollow non-standard screws are suitable for fixing door frames, cabinet frames, bathroom accessories, and wall decorations.

When using non-standard screws, it is necessary to first use an impact drill (hammer) to fit the corresponding size holes on the fixed body, then install the bolts and expansion pipes into the holes, and tighten the nuts to make the bolts, expansion pipes, installation parts and the fixed body expand and become a whole. After tightening, the bolt will expand. There is a large head at the end of the bolt, and a circular tube slightly larger than the diameter of the bolt is placed outside the bolt. There are several openings at the end of the bolt. When the bolt is tightened, the tail of the large head is brought into the open tube, which expands the tube to achieve the purpose of expansion, and then the bolt is fixed on the ground or wall to achieve the purpose of rooting.