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screws and fasteners,
7.5 hi-low thread screws
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 .
Hi-low threads screws are made from carbon steel with grade 6.8 .
|Head drive||PH 2|
Hi-low threads screws are normally customized according to applications .
|Tensile strength Mpa||305|
|Yeild strength Mpa|
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
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 .
Hi-low threads screws are mainly designed to concrete wall or brik in buliding .
Contact Person: MR.LIN