Non-tapping screws are machine Screw, the pieceworker to be fastened must be tapped with taps in the screw hole in advance to match the screw threads.
The difference between tooth screws and other screws depends on whether they can be used together with nuts. Tooth screws can be used with nuts. And relative to the screws of other teeth, there are self-tapping screws. The nut of this kind of screw has no bow teeth. As for the standard teeth and fine teeth are only different pitch, it is the nut of the machine screw
Name of product specification Materials Steel factory / origin Price (yuan/ton) Than yesterday Compared to last week Than last month Common line Φ6.5mm Q235 Handan Iron and Steel 3630 30 50 80 Common line Φ6.5mm Q235 Tang Gang 3630 30 50 80 altitude Φ6.5mm Q235 Handan Iron and Steel 3650 50 50 70 altitude Φ6.5mm Q235 Ping Gang 3650 50 50 70 altitude Φ6.5mm Q235 Guang Gang 3650 50 50 -10 Rebar Φ12mm HRB335 Ma Gang 3920 170 200 270 Rebar Φ14mm HRB335 Ma Gang 3850 130 150 220 Rebar Φ25mm HRB335 Ma Gang 3650 50 60 150 Rebar Φ12mm HRB335 Handan Iron and Steel 4000 50 180 180 Rebar Φ14mm HRB335 Handan Iron and Steel 3850 70 70 70 Rebar Φ25mm HRB335 Handan Iron and Steel 3680 20 70 150 Rebar Φ12mm HRB335 Guang Gang 3840 20 90 90 Rebar Φ14mm HRB335 Guang Gang 3770 20 40 40 Rebar Φ25mm HRB335 Guang Gang 3650 20 70 70 Rebar Φ12mm HRB335 Tang Gang 3920 170 200 270 Rebar Φ14mm HRB335 Tang Gang 3850 130 150 220 Rebar Φ25mm HRB335 Tang Gang 3650 50 60 150 Grade III rebar Φ12mm HRB400 Ma Gang 3890 0 130 130 Grade III rebar Φ14mm HRB400 Ma Gang 3870 0 140 140 Grade III rebar Φ25mm HRB400 Ma Gang 3730 0 80 130
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