Self drilling tapping stainless steel screws M6.3 series

M5.5 Stainless Steel Self-Drilling Screws for Solar Mounting Systems |Art Sign

Design Features

— Premium Material: High-strength stainless steel for superior outdoor durability.
— Efficient Install: Self-drilling tip enables fast, pre-drilling-free fastening.
— Weather-Resistant: Excellent rust resistance for harsh solar environments.
— Secure Grip: Engineered thread design ensures maximum pull-out strength.

Overview of solar stainless steel Self-Drilling Screws AS-SDB-5.5-L	Spc：M5.5*25mm
Self-drilling bolt size	Washer for option
Application for Solar Roof Hook Installation	Application for Solar Mini Rail Installation

High quality, well packed and fast delivery.Click to see more screw and bolt.

Anchor bolt	Self-drilling bolt	Cutting thread self tapping screw	M8 Hanger bolt	M10 Hanger bolt

FAQ1: What materials are available for these solar self-drilling screws?

A: We primarily offer high-grade SUS410 and SUS304/316 stainless steel. For solar metal roof applications, SUS410 is highly recommended because it can be heat-treated for excellent hardness to drill through steel sheets while maintaining strong corrosion resistance.

FAQ2: Can these screws drill through steel plates without pre-drilling? What is the maximum drilling capacity?

A: Yes, no pre-drilling is required. The self-drilling tip (tek point) is engineered to drill, tap, and fasten in one operation. For the M5.5/M6.3 series, the maximum drilling capacity is typically up to 6mm thickness for carbon steel/aluminum profiles (specific capacity depends on the material hardness and screw length).

FAQ3: How do these screws ensure waterproofing on solar metal roofs?

A: Our screws come pre-assembled with premium EPDM washers (or silicone washers upon request). The EPDM material features excellent UV, ozone, and aging resistance, creating a long-lasting, watertight seal when fastened against the metal sheet or roof hooks.

FAQ4: How long is your delivery time?

Generally, for LCL goods is 7-15 working days, FCL can be 20-35 working days. For more, it shouldbe negotiated. We are verified with ISO 9001, so our production management system is completed.

FAQ5: What certifications do your products have?

Xiamen Art Sign holds global leading certifications to ensure compliance in major markets: TUV Rheinland (Germany/Global) CE (Europe) ISO 9001 (Quality Management) AS/NZS 1170 (Australia/New Zealand) All test reports and certificates are available for download or upon request.