S-93005A553 5/16"-18 x 1 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with four-arm head design for easy hand-tightening without tools
• Superior corrosion resistance thanks to black-oxide steel finish for extended service life in harsh environments
• High mechanical strength with 180,000 psi tensile strength and Rockwell C40 hardness for demanding applications
• Reliable coarse threading using 5/16"-18 UNC threads for faster installation and reduced cross-threading risk
• Full thread engagement along the 1 9/16" thread length for secure fastening across various material thicknesses
• Precise thread fit with Class 2A tolerance ensuring consistent performance and interchangeability
• Extended tip design facilitating easier alignment and initial engagement in assembly operations

Professional Applications & Engineering Value

This black-oxide steel thumb screw delivers exceptional value in industrial settings where frequent adjustments and tool-less operation are required. The four-arm head provides substantial mechanical advantage for hand-tightening, while the coarse UNC threads enable rapid installation in machinery, electrical enclosures, and production equipment. The extended tip significantly reduces alignment time during assembly, particularly beneficial in high-volume manufacturing environments. With its 180,000 psi tensile strength and corrosion-resistant finish, this thumb screw maintains integrity under vibration and in challenging conditions, making it ideal for maintenance panels, access doors, and adjustable components across multiple industrial sectors.

Specification Summary & Compliance

This thumb screw features precision Class 2A thread fit with 5/16"-18 UNC coarse threads manufactured to standard dimensional requirements. The product maintains RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance regarding restricted substances, ensuring environmental regulatory adherence for industrial applications worldwide.