Head Types:

• Truss head (Oval head with flat bearing surface)
• Countersunk head (Flat head flush with surface)
• Raised Counter-sunk head (Oval countersunk head)
• Pan head (Rounded head with short vertical sides)
• Hex head (Hexagonal head)

Size Range:

• ST2.25-ST8 (Self-tapping screw sizes)

Materials:

• Carbon Steel
• Alloy Steel
• Stainless Steel
• Copper
• Aluminum

Standards:

• GB (Chinese National Standard)
• JB/ZQ (Chinese Industry Standard)
• ISO (International Standard)
• DIN (German Standard)
• ANSI/ASME (American Standard)
• JIS (Japanese Standard)
• BS (British Standard)