Confirmat screw (furniture screw)        
Flat/hex socket head, with or without deep hole, steel.        
Chipboard thread        
* drive: Pozi, hex, square, philip.        
* finsih: Zp, yz, np or others.
Item  Spec.   Pitch 1   Pitch 2    Head dia.
1  6.3*40mm    3   2.6    9.5-10.5
2  6.3*50mm    3   2.6    9.5-10.5
3  7*40mm    3   2.6    9.5-10.5
4  7*50mm    3   2.6    9.5-10.5
5  7*60mm    3   2.6    9.5-10.5
6  7*70mm    3   2.6    9.5-10.5
Fine thread, flat head, with or without deep hole,
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