S-91773A571 1/4"-20 x 3 1/2" ASME B18.6.3 Stainless Steel Round Head Phillips Screws
Stainless Steel Round Head Phillips Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
- High tensile strength of 100,000 psi ensures reliable performance in demanding applications
- Rockwell B100 hardness provides excellent durability and resistance to wear
- Class 2A thread fit with UNC coarse threads offers easy assembly and secure fastening
- Partially threaded design allows for precise clamping control in various materials
- Phillips drive (No. 3) enables efficient installation with standard tools
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality and environmental safety
Professional Applications & Engineering Value
This 1/4"-20 x 3 1/2" stainless steel rounded head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress conditions. The 18-8 stainless steel material combined with a passivated finish significantly enhances resistance to rust and chemical exposure, making it suitable for outdoor, marine, and chemical processing equipment. The UNC coarse thread and right-hand thread direction facilitate quick installation in wood, metal, and plastic assemblies, while the partially threaded shank provides optimal grip and prevents over-tightening. Ideal for machinery, construction, and automotive applications, this screw delivers consistent performance where ASME B18.6.3 compliance and high tensile strength are critical for safety and longevity.
Specification Summary & Compliance
This screw features precise Class 2A thread fit with UNC coarse threading (1/4"-20) and a length of 3 1/2", ensuring dimensional accuracy for reliable fastening. It meets ASME B18.6.3 manufacturing standards for consistency and safety, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming it is free from hazardous substances and suitable for global industrial use.
