S-91979A691 M3 x 4 mm Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Secure, vibration-resistant fastening thanks to the cup tip design that digs into surfaces and prevents loosening
• Easy installation and removal with the 1.5mm hex drive, providing reliable torque transfer in confined spaces
• Optimized for high-volume assembly with coarse 0.5mm pitch threads for faster driving and reduced cross-threading risk
• Enhanced pressure equalization through the 1.1mm vent diameter, preventing pressure buildup in sensitive applications
• Precise thread engagement with Class 6g fit ensuring consistent, reliable performance in metric assemblies
• Compliance with global environmental standards including RoHS 3 and REACH for use in regulated industries

Professional Applications & Engineering Value

This M3 set screw is engineered to solve critical challenges in precision assembly and machinery. The 18-8 stainless steel provides excellent resistance to rust and corrosion, making it ideal for applications in electronics, automotive, and outdoor equipment where environmental factors are a concern. The headless design with a 1.5mm hex drive allows for flush mounting in tight spaces, eliminating protrusions that could interfere with moving parts. The vented feature (1.1mm vent diameter) is particularly valuable in sealed systems, allowing pressure equalization to prevent failure. Combined with a Class 6g thread fit and coarse pitch, this metric set screw ensures quick, secure installation with minimal risk of stripping, delivering reliable clamping force for shafts, collars, and gears in demanding right-hand thread applications.

Specification Summary & Compliance

This set screw features precise M3 x 0.5mm coarse pitch threading with a Class 6g thread fit per metric standards, ensuring dimensional accuracy and reliable performance. It is manufactured from 18-8 stainless steel with a cup tip and vented design (1.1mm vent diameter). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting stringent environmental and safety requirements for industrial use.