S-93015A220 5/16"-18 x 1 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 grip and torque application with 1 1/8" diameter knurled head for secure hand-tightening without tools
- Superior corrosion resistance thanks to 18-8 stainless steel construction for long-term reliability in harsh environments
- Optimized thread engagement with 5/16"-18 UNC coarse threading providing quick assembly and vibration resistance
- High mechanical strength delivering 80,000 psi tensile strength and Rockwell B83 hardness for demanding applications
- Precise alignment and positioning enabled by extended tip design and Class 2A thread fit
- Low-profile installation with round head design minimizing protrusion in confined spaces
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe industrial use
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw solves critical fastening challenges in industrial maintenance, machinery access panels, and electronic enclosures where tool-less operation is essential. The knurled head texture provides exceptional grip even with oily hands or gloves, while the coarse UNC threading ensures rapid installation and removal in high-vibration environments. The extended tip facilitates precise alignment in pre-tapped holes, reducing cross-threading risks. With partial threading along the 1 3/4" length, it maintains clamping force across wider gaps without compromising structural integrity. The combination of corrosion-resistant material and heavy-duty construction makes it ideal for outdoor equipment, marine applications, and manufacturing facilities requiring frequent access panels.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 5/16"-18 UNC coarse thread specification. Features 1 3/4" overall length with 1 1/4" threaded portion and 3/16" extended tip. Mechanical properties include 80,000 psi tensile strength and Rockwell B83 hardness. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial deployment.
