S-95635A553 1/4"-20 x 2" Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced Tamper Resistance – Tamper-resistant hex drive prevents unauthorized removal, ideal for public and high-security installations.
• Superior Corrosion Resistance – 18-8 Stainless Steel with Passivated finish ensures long-term durability in harsh, moist, or chemical environments.
• High Tensile Strength & Hardness – 70,000 psi tensile strength and Rockwell B70 hardness provide reliable clamping force and resistance to deformation under load.
• Precision Thread Fit – Class 3A UNC coarse threads ensure easy starting, secure fastening, and reduced risk of cross-threading in industrial assemblies.
• Secure, Low-Profile Design – Rounded button head offers a smooth finish that minimizes snagging while maintaining a professional appearance.
• Partial Threading for Versatility – Allows unthreaded shank section to act as a precision pilot or pivot point in machinery and fixtures.
• Compliant with Global Standards – Meets RoHS 3 and REACH regulations, ensuring safety and environmental responsibility for international supply chains.

Professional Applications & Engineering Value

This 1/4"-20 x 2" tamper-resistant hex rounded head screw is engineered to address critical needs in security, durability, and precision across multiple sectors. The 18-8 Stainless Steel construction, enhanced by a passivated finish, provides exceptional resistance to rust and chemical exposure, making it suitable for outdoor equipment, food processing machinery, and marine applications. The tamper-resistant hex drive (5/32") deters vandalism and unauthorized access in public infrastructure, electrical enclosures, and transportation systems. With UNC coarse threads and a Class 3A thread fit, installation is swift and reliable, reducing assembly time and improving joint integrity. The partially threaded design allows the unthreaded portion to serve as a shear zone or alignment guide, adding value in automated assembly and precision mechanical frameworks.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a Class 3A thread fit for high precision and consistent engagement. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring the absence of hazardous substances. Dimensions include a 1/4"-20 thread size, 2" length with 1" minimum thread length, 0.437" head diameter, and 5/32" tamper-resistant hex drive. The 18-8 Stainless Steel material and passivated finish further support compliance with industrial corrosion resistance and mechanical performance requirements.