S-91746A416 1/4"-20 x 1 1/4" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a 3/4" diameter knurled head for superior grip without tools
• Exceptional corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments
• High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for reliable load-bearing
• Quick installation and secure fit with 1/4"-20 UNC coarse threads and Class 2A thread fit
• Space-saving low-profile design with 3/16" head height for applications with limited clearance
• Versatile partial threading (1 13/16" thread length) for adjustable clamping and positioning
• Compliant with industry regulations including RoHS 3 and REACH for safe use in regulated sectors

Professional Applications & Engineering Value

This low profile thumb screw delivers critical advantages in industrial settings where tool-less access and corrosion resistance are paramount. Engineered from 18-8 stainless steel, it withstands corrosive environments in electronics, machinery panels, and outdoor equipment. The knurled head texture ensures positive grip even with oily hands or gloves, reducing installation time. Its 1/4"-20 UNC coarse thread enables rapid engagement and disengagement, while the Class 2A thread fit maintains consistent performance in vibration-prone assemblies. The partially threaded design allows for precise adjustment in jigs, fixtures, and access panels, making it ideal for maintenance-heavy applications requiring frequent adjustments.

Specification Summary & Compliance

This thumb screw maintains Class 2A thread fit tolerances per UNC standards, ensuring precise thread engagement. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming material safety and environmental responsibility. The 18-8 stainless steel construction provides consistent mechanical properties with 80,000 psi tensile strength and Rockwell B83 hardness, suitable for demanding industrial applications.