S-91518A150 M5 x 10 mm Left-Hand-Thread Stainless Steel Hex-Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh industrial environments.
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads.
• Precision left-hand threading with Class 6g fit and M5 x 0.8mm coarse pitch, providing secure fastening in specialized reverse-thread applications.
• Easy installation and removal thanks to the 3 mm hex drive and standard flat head with 90° countersink angle, enabling flush mounting and efficient tool engagement.
• Full threading along the 10 mm length ensures maximum grip and uniform stress distribution in assembled components.
• Compliance with environmental regulations including RoHS 3 and REACH, making it safe for use in regulated industries.
• Durable and maintenance-free operation due to the material and finish combination, reducing downtime and replacement costs.

Professional Applications & Engineering Value

This M5 left-hand thread flat head screw is engineered to address critical challenges in machinery and equipment where reverse threading prevents loosening from rotational forces. The 18-8 stainless steel with a passivated finish provides exceptional resistance to rust and chemical exposure, ideal for automotive, aerospace, and marine applications. Its Class 6g thread fit and coarse pitch ensure quick assembly and reliable holding power, while the hex drive design allows for high-torque installation without slippage. Fully threaded and with a precise 90° countersink, it offers a flush finish that minimizes protrusion and enhances safety in moving parts. These features make it a trusted solution for maintaining integrity in high-vibration environments and specialized industrial systems.

Specification Summary & Compliance

This screw adheres to metric coarse thread standards with M5 x 0.8mm dimensions and a Class 6g thread fit for precise tolerance. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. The specifications include a length of 10 mm, fully threaded design, and a standard flat head profile, supporting consistent performance in industrial fastening applications.