S-91794A546 1/4"-20 x 1 1/2" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable, long-lasting fastening under demanding mechanical loads.
• Excellent thread engagement with UNC coarse threading and Class 2A fit for quick assembly and vibration resistance.
• Optimized drive performance from the slotted drive and high, narrow fillister head for secure tool engagement.
• Full threading along the 1-1/2" length provides maximum grip and uniform clamping force across applications.
• Consistent hardness (Rockwell B55) maintains structural integrity and prevents stripping during installation.
• Compliance with ASME B18.6.3 and environmental regulations guarantees quality, safety, and suitability for regulated industries.

Professional Applications & Engineering Value

This 1/4"-20 UNC coarse thread fillister head machine screw is engineered to address critical fastening challenges in industrial settings. Made from 18-8 stainless steel with a passivated finish, it delivers exceptional resistance to rust and chemical exposure, making it ideal for machinery, electrical enclosures, and automotive assemblies where moisture or contaminants are present. The high, narrow rounded head profile and slotted drive facilitate easy access in tight spaces and ensure reliable torque transmission. With full threading and a Class 2A thread fit, it provides precise alignment and reduces the risk of loosening under vibration, enhancing the durability of your equipment. These features make it a trusted choice for OEMs and maintenance teams seeking corrosion-resistant, high-strength fasteners that meet rigorous performance standards.

Specification Summary & Compliance

This screw adheres to precise dimensional tolerances, including a Class 2A thread fit and UNC coarse thread standards, ensuring compatibility and ease of assembly. It is manufactured in compliance with ASME B18.6.3 for consistent quality and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its safety for use in environments with strict environmental and health regulations.