S-91773A542 1/4"-20 x 1" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• High mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Precision thread engagement with UNC Class 2A coarse threads ensuring reliable fastening and vibration resistance
• Optimized drive performance featuring Phillips No. 3 drive for secure torque transmission and reduced cam-out
• Full thread coverage along the entire 1" length providing maximum grip and load distribution
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

These 18-8 stainless steel rounded head Phillips screws deliver exceptional value in industrial settings where corrosion resistance and mechanical reliability are paramount. The combination of UNC coarse threading and Class 2A thread fit ensures quick assembly and secure fastening in materials prone to vibration loosening. The passivated finish enhances the natural corrosion resistance of stainless steel, making these fully threaded screws ideal for outdoor equipment, marine applications, food processing machinery, and chemical processing plants. The rounded head design with Phillips No. 3 drive provides a clean appearance while facilitating efficient installation in automated assembly systems and maintenance operations where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with 1/4"-20 UNC coarse threads maintaining Class 2A tolerance for consistent performance. These fully threaded right-hand screws feature a standard rounded head profile with 0.472" diameter and comply with ASME B18.6.3 mechanical and dimensional requirements. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring suitability for global industrial supply chains and environmentally conscious manufacturing operations.