The 3.5x19mm Security 2-HOLES Rsdcsk Tap Screw A2 from Qualfast is designed to provide robust and reliable fastening solutions for a variety of applications. Crafted with high-quality materials, these screws ensure durability and resistance to corrosion, making them ideal for both indoor and outdoor use. Their unique security design helps prevent tampering, offering peace of mind in securing fixtures and installations. This product range is perfect for professionals and DIY enthusiasts alike, delivering exceptional performance and reliability in every project. Features: dk (max.): 5.7 Thread Size: 3.5 k (max.): 1.65 Length: 19 Material Technical: A2 Driving Features: Snake Eyes L: 19mm Material: Stainless Steel Thread: Self Tapping Thread Head Shape: Countersunk Oval Head No. Drive: TH4 Grade: A2 D: 3.5mm Applications: - Ideal for securing fixtures and fittings in high-security environments. - Suitable for use in outdoor applications due to corrosion-resistant A2 stainless steel.