London, November 15 news: The London Metal Exchange (LME) has the following changes in inventory in the five trading days (in tons):
Variety Newer inventory November 15 November 14 November 11 November 10 November 9
Copper 64,850 - 150 - 350 -1,100 - 1,025 + 450
Aluminum 493,550 + 700 -3,675 - 700 + 100 +2,475
Tin 12,625 +1,690 +2,320 - 45 - 135 - 85
Lead 45,700 - 350 - 450 - 900 - 225 - 800
Zinc 464,550 -2,500 -2,625 -2,400 -2,425 - 600
Nickel 20,208 + 366 + 234 - 246 + 156 + 186
Aluminum Alloy 55,780 Flat +180 Flat Flat
NASAAC 124,460 flat - 40 - 40 flat - 100
*NASAAC is a North American specialty aluminum alloy
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
Hex Machine screw,pan machine screw,flat machine screw,truss machine screw,Hexagon socket screws
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