S-91794A764 1/4"-20 x 3/8" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 Stainless Steel construction, ideal for harsh or humid environments.
• Excellent mechanical strength with a tensile strength of 70,000 psi and Rockwell B55 hardness for reliable, heavy-duty load-bearing.
• Precise and easy installation with a Class 2A thread fit and coarse UNC threading, ensuring quick assembly and a secure hold.
• Durable and accessible drive design featuring a slotted drive on a high, narrow fillister head for straightforward tool engagement.
• Full-threaded design provides consistent engagement and maximum grip along the entire 3/8" length.
• Compliance with major industry standards including ASME B18.6.3, ensuring dimensional reliability and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting strict regulatory requirements.

Professional Applications & Engineering Value

This 1/4"-20 UNC Rounded Head Slotted Screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and the need for reliable fastening under stress. The 18-8 Stainless Steel material offers inherent resistance to rust and oxidation, making it a top choice for outdoor equipment, marine applications, food processing machinery, and chemical processing plants. The coarse thread spacing and Class 2A fit provide excellent engagement in a variety of materials, reducing the risk of cross-threading and ensuring a robust connection. The distinctive fillister head style with a high, narrow profile and slotted drive allows for a deep socket engagement, which is crucial in applications where space is limited but a high-torque installation is required. This combination of corrosion-resistant properties, high tensile strength, and standardized dimensions delivers long-term reliability and reduces maintenance needs in demanding engineering environments.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC thread with coarse spacing and a Class 2A thread fit, ensuring dimensional accuracy and ease of assembly. It is manufactured in compliance with the ASME B18.6.3 standard for slotted head screws. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its adherence to environmental and safety regulations.