S-91830A577 1/4"-20 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for demanding industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for reliable, long-term performance
• Enhanced grip and torque application thanks to the fully knurled head design, allowing for quick manual adjustments without tools
• Precision threading with Class 2A UNC coarse threads ensuring smooth engagement and secure fastening
• Versatile installation through fully threaded design and right-hand thread direction for broad compatibility
• Regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Durable raised round head profile providing increased surface contact and resistance to wear during repeated use

Professional Applications & Engineering Value

This 1/4-20 UNC thumb screw delivers critical performance in applications requiring frequent adjustments and high reliability. The 18-8 stainless steel material ensures excellent corrosion resistance, making it suitable for electronics, machinery, marine, and outdoor equipment where environmental factors are a concern. The coarse UNC thread and Class 2A thread fit provide rapid assembly and secure holding power, reducing installation time in production lines. The fully knurled head offers superior grip even with greasy or gloved hands, minimizing slippage and improving operator safety. Its fully threaded design allows for consistent clamping force across the entire length, essential for vibration-prone assemblies. These features collectively solve common industrial pain points like corrosion-induced failure, difficult manual handling, and inefficient assembly processes.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy. Key specifications include a 1/4"-20 thread size, 3/4" length, and coarse thread spacing. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial and consumer applications.