S-99397A433 Length 4 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in demanding environments.
• Enhanced torque transmission and reduced cam-out with the Torx Plus IP10 drive, ensuring secure installation and preventing tool slippage.
• Excellent holding power in plastic materials due to the TRS thread forming design and tri-lobe shank, which creates strong, reliable threads without chips.
• Reduced risk of material splitting thanks to the blunt tip, making it ideal for delicate plastic assemblies.
• Full threading for maximum grip along the entire 4mm length, providing consistent clamping force.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring suitability for global industrial supply chains.
• Precision metric sizing (M3.12) with a 1.27mm thread pitch for accurate fit and reliable performance in standardized applications.

Professional Applications & Engineering Value

This M3.12 TRS tapping screw is engineered to solve common fastening challenges in plastic assemblies. The 18-8 stainless steel material provides excellent resistance to corrosion, essential for electronics, automotive components, and outdoor equipment. The thread forming (TRS) action and tri-lobe shank design displace plastic material to create strong, clean internal threads without generating chips, eliminating the risk of electrical shorts or contamination in sensitive applications. Combined with the Torx Plus IP10 drive, it allows for higher torque application and prevents stripping, ensuring a secure, vibration-resistant connection that maintains integrity over the product's lifecycle, making it a reliable plastic fastener for high-volume manufacturing.

Specification Summary & Compliance

This metric screw features an M3.12 size with an approximate thread pitch of 1.27mm and a 4mm length, fully threaded. It is designed as a thread forming screw (TRS type) with a tri-lobe shank and blunt tip, intended for use with a No. 37 drill bit (0.104" diameter). The fastener is manufactured to high precision standards for reliable performance. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent international environmental and safety regulations for industrial components.