S-90165A416 1/4"-20 x 2 3/4" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced torque application with four-arm thumb head design for secure manual tightening without tools
- Superior corrosion resistance through black-oxide steel construction for extended service life in harsh environments
- Optimized load distribution with removable swivel tip preventing surface damage during high-pressure applications
- Reliable thread engagement through Class 2A UNC coarse threads ensuring consistent fastening performance
- Exceptional mechanical strength with 180,000 psi tensile strength and Rockwell C40 hardness for heavy-duty applications
- Versatile positioning capability with 10° maximum swivel angle accommodating misaligned installations
- Full-length threading providing maximum adjustment range and grip depth for various material thicknesses
Professional Applications & Engineering Value
This black-oxide steel thumb screw delivers critical engineering solutions for industrial assembly challenges. The four-arm head design enables rapid manual installation and removal in confined spaces where tool access is limited. The removable swivel tip with 10° articulation compensates for minor misalignments while preventing marring of sensitive surfaces. With Class 2A UNC coarse threading, the screw maintains consistent clamping force in vibration-prone environments. The combination of 180,000 psi tensile strength and Rockwell C40 hardness ensures reliable performance in high-stress applications including machinery guards, access panels, and adjustable fixtures. The black-oxide finish provides essential corrosion protection for manufacturing facilities, outdoor equipment, and industrial controls.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit standards with UNC coarse threading (1/4"-20) ensuring dimensional accuracy and interchangeability. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) requirements for chemical safety. Full compliance documentation available upon request for quality assurance and regulatory verification.
