Owlett-Jaton A2-304 Stainless Steel Tamper Tx Machine Screws Button Head - M8 x 40 (Box of 200)The A2 304 Stainless Steel Tamper TX Machine Screws are designed for secure fastening in various applications. With a button head design and a size of M8 x 40, these screws provide excellent durability and resistance to corrosion. High Quality A2 304 Stainless Steel for Enhanced Durability Tamper Resistant Design for Added Security Button Head Style for a Clean Finish Ideal for Use in Outdoor and Indoor Applications Easy to Install with Standard Tools