S-90200A120 1/4"-20 x 3/4" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior manual grip with high-profile knurled head design for effortless hand-tightening without tools
- Enhanced corrosion resistance through black-oxide steel construction for extended service life in industrial environments
- Reliable thread engagement with UNC coarse spacing and Class 2A fit ensuring consistent fastening performance
- Exceptional mechanical strength delivering 70,000 psi tensile strength for demanding applications
- Optimized wear resistance with Rockwell B84 hardness maintaining performance through repeated use
- Full-threaded design providing maximum engagement length and superior holding power
- Compliance-ready construction meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for applications requiring frequent adjustments and tool-free operation, these black-oxide steel thumb screws solve critical challenges in maintenance panels, access covers, and machinery guards. The high-profile knurled head delivers exceptional tactile control even with gloved hands, while the UNC coarse thread spacing enables rapid installation and removal. The Class 2A thread fit ensures consistent performance across multiple cycles without galling or cross-threading. Ideal for industrial equipment, electronic enclosures, and manufacturing jigs where manual fastening solutions must withstand repeated use without compromising thread integrity or corrosion resistance.
Specification Summary & Compliance
This thumb screw features precision 1/4"-20 UNC threads with Class 2A fit tolerance for reliable engagement. Manufacturing complies with RoHS 3 (2015/863/EU) with exemption 6(a)-I and REACH (EC 1907/2006) standards. The fully threaded design maintains consistent coarse thread spacing throughout the 3/4" length, while the 5/8" diameter knurled head provides optimal manual control. Mechanical properties include Rockwell B84 hardness and 70,000 psi tensile strength for industrial-grade performance.
