Product Description：
Name: Phillips Flat Countersunk Head Self-Drilling Screws
Type: Self-Tapping Screws
Material: 410 Stainless Steel
Surface: Black
Head Type: Countersunk
Size: Thread Diameter x Length (Excluding Head Thickness)
e.g.: M3.5x13mm(Thread Diameter 3.5mm, length 13mm)
Thread Diameter: M3.5(3.5mm)/M3.9(3.9mm)/M4.2(4.2mm)/M4.8(4.8mm)/M5.5(5.5mm)
Length(Excluding Head Thickness): 13mm/16mm/19mm/25mm/32mm/38mm/45mm/50mm/55mm/60mm/63mm/70mm/75mm
Customer service online time：
Our working hours are from 8:30 am to 17:30 pm Beijing time Monday to Saturday，(excluding Chinese holidays and special circumstances).
If the customer service does not reply to the message in time, please be patient, we will reply you immediately when we see the message.
Issue Resolution：
If you encounter any problems with your order, we are here to help. Please reach out to us, and we will do our best to address and resolve any issues in a timely manner.
