PRINCE FASTENER (NANTONG) MANUFACTURING CO., LTD. 

The Prince Fastener Self Tapping Screw Flat Head
The correct name for the head of this self-tapping screw would be “hexagonal HWM.”

The figure below shows the shape of the commonly used Prince Fastener self-tapping screw, and the difference between it and the outer hexagonal head is that the washer head is an integral part of the hexagon head and the disk with an arc crossing.

Application of Prince Fastener Self Tapping Screw Flat Head
Self-tapping screws are used in a range of purposes ranging from DIY carpentry to surgery.

A Prince fastener self-tapping Screw Manufacturer can precisely be described in reality a tapping screw, however is additionally usually referred to as a sheet
metallic screw, for the reason that they are used so closely in the sheet steel trade.

Whichever identify is used, a Prince fastener self-tapping screw (or sheet metallic screw), is unique as such due to the fact it consists of shape
mating threads (thereby “tapping” the threads) in a pre-drilled gap into which they are driven.

The materials of Prince Fastener Self Tapping Screw Flat Head
1,. Carbon steel bit screw. 1022A, the standard heat-treated steel can be used as the material for drilling and tail screws production. After heat-treated, the surface hardness is HV560-750, and the core hardness is HV240-450. The standard surface treatment is easy to rust, high hardness, and low cost.

2,Stainless steel drill screw. Heat treatment, rust resistance than carbon steel, worse than stainless steel;

3,Stainless steel drill screw. 304, can not do heat treatment, rust resistance, low hardness, high cost, can only drill aluminum, wood, plywood;

4, Compound bit screw. The drill is produced with carbon steel, thread, and head with 304 stainless steel combined production process.