1. First, remove the sludge on the surface of the broken screw, use the middle gun to kill the middle of the section, and then install a 6-8 mm diameter drill bit with an electric drill, and drill the hole in the middle of the section. Note that the hol

　　Although stainless steel is called stainless steel, it is definitely not rust-free. When using stainless steel fasteners, we must know how to avoid product

　　In life, copper bolts, copper screws, copper screws, etc. are often mentioned. What is the difference between them? In fact, the standard saying is that the

　　Common types of knurling on the surface of copper nuts: herringbone knurled nuts, net knurled nuts, diamond knurled nuts, straight knurled nuts, diagonal kn

　　The copper wire rod and the copper nut are a pair of friction pairs. The reasons for choosing copper materials for the friction pairs are as follows:　　One

　　Circlips are also called retaining rings or buckles, which are a kind of fasteners, which are installed in the shaft grooves or hole grooves of machines and

　　How to choose a circlip and a retaining ring?　　Circlips, also called retaining rings or buckles, are a kind of hardware fasteners. There are many types of

　　How many types of Handan self-tapping nails can be divided into different heads?　　According to the different heads, it can be divided into: round head, fl

　　1. The head should be round (this is also the common standard for all round head screws). Because of the production process, the heads of drywall nails prod