S-91773A166 1-64 x 1/4" 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 construction and passivated finish, ideal for harsh or humid environments.
- High tensile strength of 100,000 psi ensures reliable load-bearing capacity and reduces the risk of fastener failure in demanding applications.
- Coarse UNC threading (1-64) provides faster installation and better resistance to vibration loosening compared to fine threads.
- Fully threaded design offers maximum grip and uniform stress distribution along the entire shank length.
- Phillips drive (No. 0) allows for efficient torque application and reduced cam-out during assembly.
- Class 2A thread fit ensures consistent, easy engagement with standard nuts and tapped holes, speeding up production.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 1-64 UNC coarse thread screw is engineered to address common industrial challenges such as corrosion, vibration, and assembly efficiency. Made from 18-8 stainless steel with a passivated finish, it provides exceptional resistance to oxidation and chemical exposure, making it suitable for electronics, machinery, and outdoor equipment. The rounded head and Phillips drive facilitate quick, secure fastening without sharp edges, reducing installation time and improving worker safety. Its fully threaded and coarse thread design ensures strong holding power in softer materials and minimizes loosening under dynamic loads, delivering long-term reliability in industrial fastener applications.
Specification Summary & Compliance
This rounded head screw adheres to Class 2A thread fit and UNC coarse thread standards with precise dimensions (1/4" length, 0.073" thread diameter). It meets ASME B18.6.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The Rockwell B100 hardness and 100,000 psi tensile strength further validate its performance in inch-system applications.
