S-91210A802 M4 x 20 mm DIN 914, ISO 4027 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with a 90° cone point that digs into mating surfaces, preventing loosening under vibration and torque.
• Exceptional durability from zinc-plated alloy steel construction, offering reliable corrosion resistance for extended service life in demanding environments.
• Optimized thread engagement with a coarse M4 x 0.7 mm thread and Class 5g6g fit, ensuring easy installation and a secure, precise fastening.
• Efficient installation and removal using a standard 2 mm hex key, providing a flush, headless design ideal for space-constrained applications.
• Enhanced mechanical strength with a Rockwell C45 hardness rating, delivering high resistance to wear and deformation under load.
• Guaranteed dimensional accuracy and performance consistency, manufactured to meet DIN 914 and ISO 4027 standards for reliable interchangeability.
• Safe for regulated industries with full compliance to RoHS 3 and REACH, ensuring environmental and health safety in your assemblies.

Professional Applications & Engineering Value

This M4 set screw is engineered to address critical challenges in precision assembly and machinery. The zinc-plated alloy steel material provides a robust barrier against corrosion, while the 90° cone point ensures maximum grip by concentrating force on a small area, preventing component slippage in high-vibration environments like motors, gears, and pulleys. Its headless design and 2 mm hex drive allow for flush mounting in tight spaces, making it ideal for securing collars, knobs, and shafts without protruding hardware. The coarse thread with Class 5g6g tolerance facilitates quick installation and reliable clamping force, reducing assembly time and maintenance needs in industrial fastening systems.

Specification Summary & Compliance

This set screw features precise metric dimensions: M4 thread size, 0.7 mm pitch, and 20 mm length, with a Class 5g6g thread fit per ISO standards for consistent accuracy. It is manufactured in compliance with DIN 914 and ISO 4027 specifications, ensuring adherence to international engineering norms. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming its suitability for use in environmentally conscious and safety-regulated industrial applications.