The tail of the drilling screw is in the shape of drilling tail or sharp tail, without auxiliary processing, can be directly drilled, tapped and locked on the setting material and basic material, greatly saving construction time. Compared with ordinary screws, its toughness and maintenance force is high, and it will not be loose after a long time after combination, and the operation is simple to use safe drilling and tapping once.
Use: It is a kind of screw, mainly used in the steel structure of the color steel tile fixed can also be used for simple construction of thin plate fixed. It cannot be used for metal-metal bonding.
Models are: Φ4.2/ Φ4.8/ Φ5.5/ Φ6.3mm, the specific length can be agreed upon according to requirements.
According to the material can be divided into: steel 1022A, stainless iron 410, stainless steel 304.
1, carbon steel drilling screws, 1022A, standard heat treatment steel can be used as drilling screws production materials, surface hardness after heat treatment HV560-750, heart hardness HV240-450, ordinary surface treatment easy to rust, high hardness, low cost.
2, stainless iron drill screw, 410, heat treatment, rust resistance is better than carbon steel, worse than stainless steel.
3, stainless steel drilling screws, 304, can not do heat treatment, rust prevention ability, low hardness, high cost, can only drill aluminum plate, wood, rubber plate.
4, composite drilling screws, the drill is produced with carbon steel, thread and head with 304 stainless steel combined process production.