S-91735A535 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 from 316 stainless steel with passivated finish, ideal for harsh chemical and marine environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable load-bearing performance
• Optimized installation efficiency through Phillips No. 3 drive and UNC coarse threading for faster assembly
• Full-thread engagement ensures maximum holding power across the entire 3/8" length
• Industry-standard compliance with ASME B18.6.3 specifications for consistent quality and interchangeability
• Environmental regulation adherence meeting RoHS 3 and REACH requirements for global industrial use
• Secure rounded pan head design provides low-profile fastening with excellent driver engagement

Professional Applications & Engineering Value

These 316 stainless steel pan head Phillips screws deliver critical performance advantages in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The combination of passivated finish and 316 stainless steel material provides exceptional protection against chloride-induced stress corrosion cracking, making these UNC coarse thread screws ideal for chemical processing equipment, marine hardware, and food processing machinery. The fully threaded design ensures maximum thread engagement in shallow applications, while the Class 2A thread fit maintains consistent installation torque without binding. Engineers specify these rounded head screws for applications requiring reliable fastening in corrosive environments where disassembly for maintenance is anticipated, thanks to the reusable Phillips drive design that withstands multiple installation cycles.

Specification Summary & Compliance

This 1/4"-20 x 3/8" pan head Phillips screw features precision UNC coarse threading with Class 2A thread fit tolerance for consistent installation performance. Manufactured in compliance with ASME B18.6.3 mechanical standards, the fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The fully threaded design maintains uniform engagement across the entire 3/8" length, while the passivated surface treatment enhances corrosion resistance without compromising dimensional accuracy.