Flat Head Hi-low Thread Screws Blue Dacromet for Masonry 7.5 mm Square Cone Point

Hi-low threads screws with two different threads , some threads are lower  and some threads with taller , these threads are placed in crisscross , and there is a cutting line on threads , this design make screws are to be installed more quickly and smoothly . 

Hi-low threads screws sometime are named hi-lo thread screws or thread cutting screws , and a square sharp point provides quick drilling performance and cutting function .

Material

Hi-low threads screws are made from carbon steel with grade 6.8 .

Specification

More specifications

Standaqrd

Hi-low threads screws are normally customized according to applications .

Finish

Blue dacromet

Physical Performance

Product characteristics

1 . Good corrosion resistance

Hi-low threads screws are plated in dacromet finish that make sure screws are not to be rusted in years .

2 . Harden material

Hardness for screws up to HV450 .

3 . Quick driling performance

It is more easy and quick installtino as hi-low threads screws with special thread design and square sharp point , 

4 . No burrs or scratch and bright surface

5 . Screws can be recyclable .

6 . Not easy to be broken

Installation

1 . Operated by screwdriver or screwgun with phillips bit .

2 . Pre-drill hole for more easy and accurate installation .

3 . Make sure screws are located exactly to threaded hole centre of objects .

4 . Do not put over torque on Hi-low threads screws .

Application

Hi-low threads screws are mainly designed to concrete wall or brik in buliding .