S-90200A586 5/16"-18 x 1 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with knurled round head design for secure manual tightening without tools
• Superior corrosion resistance through black-oxide steel construction for extended service life in harsh environments
• High tensile strength (70,000 psi) ensures reliable fastening under heavy loads and vibration
• Rockwell B84 hardness provides excellent durability and resistance to wear and deformation
• Coarse UNC threads with Class 2A fit enable quick installation and secure engagement in various materials
• Full threading along 1 3/4" length offers maximum adjustability and holding power
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

This black-oxide steel thumb screw delivers exceptional performance in industrial settings where frequent adjustments and reliable clamping are critical. The knurled round head provides positive grip even with oily hands or gloves, reducing installation time and eliminating tool dependency. Its 5/16"-18 UNC coarse thread with Class 2A tolerance ensures consistent engagement in machinery, fixtures, and equipment panels. The black-oxide surface treatment resists corrosion in manufacturing environments, while the 70,000 psi tensile strength maintains joint integrity under dynamic loads. Ideal for access panels, jigs, and frequently adjusted components, this fully threaded thumb screw combines user convenience with engineering reliability.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit standards with UNC coarse threading (5/16"-18) and right-hand direction. The 1 3/4" length features full threading for maximum fastening versatility. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and chemical safety in industrial applications.