The ServoCity 2.3mm Thread-Forming Screw (5mm Length) - 6 Pack is designed for use with nylon gear servos, specifically compatible with models HS-56HB, HS-81, and HS-85BB. Constructed from durable alloy steel, these screws feature a pan head and a full thread design, finished with a black-oxide coating for enhanced durability. The screws are driven by a Phillips Type 1 drive style, ensuring secure and reliable fastening.