S-93015A221 5/16"-18 x 2 1/4" 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" knurled round head for secure hand-tightening in tight spaces
- Superior corrosion resistance and durability thanks to 18-8 stainless steel construction
- High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for demanding applications
- Reliable coarse thread engagement using 5/16"-18 UNC Class 2A threads for quick assembly and vibration resistance
- Versatile partial threading with 1 3/4" thread length for adjustable clamping and positioning
- Extended tip design (3/16" length) for easier alignment and insertion into pre-tapped holes
- Compliance with environmental regulations including RoHS 3 and REACH for global industrial use
Professional Applications & Engineering Value
This 5/16"-18 UNC thumb screw delivers exceptional value in industrial settings where frequent adjustments and reliable fastening are critical. The 18-8 stainless steel material provides excellent corrosion resistance, making it ideal for machinery, electronic enclosures, and outdoor equipment exposed to moisture or chemicals. The knurled head ensures a non-slip grip even with oily hands or gloves, reducing installation time and improving operator safety. With its coarse UNC threads and Class 2A fit, it offers quick engagement and consistent performance in high-vibration environments. The partially threaded design and extended tip facilitate precise alignment and secure clamping in assembly jigs, access panels, and adjustable components, minimizing the risk of cross-threading and enhancing overall assembly efficiency.
Specification Summary & Compliance
This thumb screw features 5/16"-18 UNC coarse threads with Class 2A dimensional tolerance for reliable fit and interchangeability. Manufacturing adheres to standard inch specifications, ensuring consistent quality. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial components.
