Self tapping screw

Self tapping screw thread type

The head of the self-tapping screw is pointed and can be used normally without drilling. Widely used in doors and windows and iron sheet. So do you know what are the forms of self-tapping screws? Let's take a look at the thread types of self-tapping screws together. The thread forming of self-tapping screws has A, AB, B, BP, C and other types. At present, it has gradually been replaced by thread rolling, so it is not recommended to use in new designs.
flat washers

The difference between flat washers, spring washers and stop washers

Eliminate damage to the machine surface when the spring pad is unloaded. It must be a spring washer and a flat washer when it is used. A spring washer assembly is placed under the nut to prevent loosening of the nut. Spring washers are used for loosening, flat washers are not loose-locked, and flat washers only increase contact area.
flange bolts

Advantages of metric flange bolts

A flange is a connection device for two large-diameter pipes, usually two flange pieces plus several fastening bolts. Carbon steel flanges are flanges made of carbon. Low-carbon steel has good plasticity and low strength. After adding an appropriate amount of carbon element, it will become hard, and the plasticity will decrease and the strength will increase. Flange connection may need to withstand high tensile, compression, torsion and shear strength. Carbon steel flange is a better choice.
fine thread nut

Advantages and anti-loose methods of jam nut

Jam nut are nuts that are screwed together with bolts or screws to play a role of fastening. All production machinery must be an original part. jam nut are parts that tightly connect mechanical equipment. Threads, locking nuts and screws of the same specification can be connected together. The advantages and methods of locking nuts are introduced in detail below. Directional. Standard nuts are non-directional and can be screwed in from either end of the nut (bolt).
spring washers

What is the use of spring washers?

The spring washer is installed under the nut to prevent the nut from loosening. It is stated in the national standard. Hexagonal slotted nuts are designed for use with bolts with holes at the end of the screw. The cotter pin of the brake lever is inserted into the hole of the screw from the slot of the nut to prevent the nut from loosening automatically.