• Material: Carbon Steel, Stainless Steel 

• Surface: Yellow zinc plated Cr3+, Blue/White/Clear zinc plated Cr3+ and others coating (Geomet, Ruspert, etc)

C4 / High SST & Kesternich Test requirements

• Head type: Countersunk, Pan head, Double Flat head, Wafer head, Oval head, Wafter head, CSK with 4(6) ribs

• Drive Type: Phillips, POZI, Square, Torx, etc.

• Thread Type: 40 degree thread angle, Saw thread / Helical cutters (1-V) / Spiral thread / U thread / Evenly spaced millin thread / Straight tooth thread / U thread, etc

• Others: Type 17 / Long cut, Double cuts / 4 cuts

• - To grip composite material and to resist withdrawing

• - Cut away any debria for easy insertion

• - With sharp points for easy and quick drive.

• - High tensile strength and avoid cracking and spltting

• - Excellent quality