S-90288A546 1/4"-20 x 1 1/2" Tamper-Resistant One-Way-Drive Stainless Steel Round Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• High tensile strength of 80,000 psi ensures reliable, long-lasting fastening in demanding applications
• Excellent thread engagement with UNC coarse thread and Class 2A fit for quick assembly and vibration resistance
• Full threading along the 1-1/2" length provides maximum grip and load distribution across the entire fastener
• Rockwell B96 hardness offers excellent durability and resistance to wear and deformation
• One-way drive rounded head allows for secure installation and tamper-resistant removal
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance

Professional Applications & Engineering Value

Engineered for industrial applications where corrosion resistance and high tensile strength are critical, these 18-8 stainless steel rounded head screws solve common challenges in machinery, marine, and chemical processing equipment. The passivated finish significantly enhances the natural corrosion resistance of stainless steel, preventing failure in humid or corrosive environments. With a 1/4"-20 UNC coarse thread and Class 2A fit, these fully threaded screws ensure rapid installation and reliable performance under vibration, reducing maintenance needs. The rounded head with one-way drive provides tamper-resistant security, making them ideal for public fixtures or safety-critical assemblies where unauthorized removal is a concern.

Specification Summary & Compliance

This screw meets UNC coarse thread standards with a Class 2A thread fit for consistent, precision threading. It is manufactured from 18-8 stainless steel with a passivated finish and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.