The FIX-SPMA-10B, manufactured by Fix & Fasten, is a self-tapping M10 size stopper with a 1.5-mm thread, an 8.5-mm body, and a black finish. The material is polyamide, a thermoplastic polymer used to create a strong, durable, and lightweight component. This stopper is designed to secure the electrical connections between two surfaces without the need for separate nuts or bolts.