Self-tapping screws
DESCRIPTION
Head: countersunk, slot Philips No2
Thread: regular, full/partial, double thread (two threads)
Tip: sharp
Finish: phosphated, dark gray
Core hardness: 289-449 HV
Surface hardness: 560-653 HV
Material: steel, similar to C1018 or C1022
The company carries out a full production cycle, which ensures confidence in the quality of products, since the products we manufacture undergo multi-stage quality control between each stage of the production process.
Input control of raw materials (tensile test and chemical analysis of the metal composition using an optical spectrometer made in Italy)
Checking the geometric dimensions of the finished form of screws (self-tapping screws)
Checking the surface and internal hardness of products
Steel plate drilling speed test
Head twist test
Checking the quality of the protective coating in salt spray
visual assessment
Checking the packaging.
Self-tapping screw for drywall boards
Phosphate coating Core hardness 289-449 HV Surface hardness 560-653 HV Material: C1022
Dimensions / Weight of 1 piece of self-tapping screw, g / Price per 1 kg, in US dollars (Loose)
3.5 x 16 0.99 1.80
3.5x19 1.13 1.80
3.5x25 1.32 1.80
3.5 x 30 1.62 1.80
3.5 x 35 1.76 1.80
3.5 x 41 2.03 1.80
3.5 x 45 2.2 1.80
3.5 x 51 2.5 1.80
3.5x55 2.68 1.80
4.2x65 3.98 1.80
4.2x70 4.22 1.80
4.2x75 4.78 1.80
4.8x89 8.05 1.80
4.8x102 9.17 1.80
4.8x127 11.46 1.80
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