50Pcs Self-Drilling Screw,M4.2 Flat Head Self-Tapping Screws Drilling Tail Screw Fastener Set for Sheet Metal Fixing(M4.2 * 38)

• Usage: This self-drilling Screw is mainly used for fixation of color steel tile in steel structure, or for simple construction of thin sheet.
• Premium Quality: Made of high quality material, built to meet or exceed standard specification, and strictly follow factory quality control. brand new and high quality.
• High Maintenance: Compared with ordinary screws, they have high maintenance force, and will not be easily loose for long time.
• Easy to Operate: They can directly drill, tap and lock on material at the same time, safe and easy to operate, greatly saving construction time.
• Attention: These self-drilling screws has pointed drilling tails, no need of auxiliary processing. These screws cannot be used for bonding between metal.

Specification: Material: Zinc plated iron Head Type: Flat (countersunk) Size: M4.2*13, M4.2*16, M4.2*19, M4.2*25, M4.2*32, M4.2*38, M4.2*50 (Optional) Quantity: 50pcs Weight: 46g~161g / 1.6oz~5.7oz (approx.) Package list: 50 * Screws