Indented Hex Washer Head, Type BSD Thread, Per IFI & DIN

M3.5 x 13mm ~ M3.5 x 50mm

M4.2 x 13mm ~ M4.2 x 75mm

M4.8 x 16mm ~ M4.8 x 125mm

M5.5 x 19mm ~ M5.5 x 152mm

M6.3 x 19mm ~ M6.3 x 203mm

Coating Options: Zinc, Ruspert (Optional Nylon Head, Optional Power Painted Head)

More Coating and Recess Options Available Upon Inquiry

Self-drilling screws are widely used for steel roofing applications due to their efficiency and durability. Here's how they are typically applied:

• Fixing Metal Roofing Sheets: These screws are used to securely attach steel roofing sheets to metal or wooden frames without the need for pre-drilling.
• Weatherproofing: Often paired with EPDM washers, they create a watertight seal to prevent leaks in roofing systems.
• Insulation Installation: Used to fasten insulated panels or layers beneath the steel roofing.
• High Wind Resistance: Their strong grip ensures that roofing sheets remain secure even in areas prone to high winds or storms.

These screws are designed to handle the challenges of outdoor environments, such as corrosion and temperature changes.