S-91772A535 1/4"-20 x 3/8" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Quick and secure installation through No. 3 Phillips drive and fully threaded UNC coarse spacing design
• Precise thread engagement with Class 2A fit ensuring consistent fastening accuracy in assembly operations
• Broad regulatory compliance meeting ASME B18.6.3 standards while being RoHS 3 and REACH compliant
• Optimized head design featuring standard pan profile with 0.492" diameter for enhanced surface contact and torque distribution
• Right-hand thread configuration providing familiar installation direction for efficient maintenance and repair workflows

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these pan head screws deliver critical performance advantages in machinery assembly, equipment manufacturing, and structural frameworks. The passivated 18-8 stainless steel construction provides exceptional resistance to oxidation and chemical exposure, significantly extending service life in corrosive environments. The combination of UNC coarse threading and Class 2A fit ensures rapid installation while maintaining precise alignment in high-vibration settings. With fully threaded design and No. 3 Phillips drive, these machine screws offer superior torque transmission and reduced installation time compared to alternative fastening solutions. The rounded head profile distributes clamping force evenly, preventing surface damage while providing reliable connection integrity for heavy-duty applications across multiple industries.

Specification Summary & Compliance

This 1/4"-20 x 3/8" pan head screw maintains precise Class 2A thread fit tolerance with UNC coarse spacing (20 threads per inch) and right-hand thread direction. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations concerning chemical substances, ensuring environmental responsibility and workplace safety standards.