| 
 Item  | 
 Blue zinc phillips wafer head self drilling screw  | 
| 
 Dia  | 
 M2.9-4.8 (4#-10#)  | 
| 
 Length  | 
 13mm-170mm  | 
| 
 Material  | 
 Carbon steel,stainless steel etc  | 
| 
 Surface treament  | 
 ZP,YZP,Plain,Nickel plating,DACROMET etc  | 
| 
 Trade Terms  | 
 FOB,CFR,CIF etc  | 
| 
 Payment Terms  | 
 T/T,L/C etc  | 
| 
 Shipment Port  | 
 SHANGHAI&NINGBO etc  | 
| 
 Delivery Time  | 
 The fastest 15-30days,According to the volume to determine the delivery time  | 
There are a ton of different head shapes for screws and bolts. Here are some examples:
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| Bugle | C.S.K | Pan | Large Wafer | Wafer | Pan Framing | 
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| H.W.F | H.W.H | Hinge | Pancake | Oval | 
Additionally, there are even more types of screw drive shapes you can choose:
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| Pozi | Phillips | Slotted | Hexagon | Phillips/Slot | Trox | Square RE | 
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| H-type | S-type | Y-type | 8-point | Square/Slot | Trox tamper | Trox/Slot | 
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| Pozi round hole | Triangle | Spline | Phillips/Square | 5-point | Tri-wing | Spanner |