S-90181A591 5/16"-18 x 2" 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
- Easy manual operation with spade head design requiring no tools for quick installation and removal
- Superior durability from steel construction with Rockwell B55 hardness resisting deformation under repeated use
- High load-bearing capacity with 40,000 psi tensile strength for demanding industrial applications
- Reliable thread engagement through fully threaded UNC coarse threads ensuring secure fastening
- Precision fit with Class 2A thread tolerance providing consistent performance in assembly operations
- Environmental compliance meeting RoHS 3 standards for safe use across regulated industries
- Optimized grip with right-hand thread direction following standard installation practices
Professional Applications & Engineering Value
This heavy-duty thumb screw addresses critical needs in industrial maintenance, machinery access panels, and equipment prototyping where frequent disassembly is required. The steel construction combined with Rockwell B55 hardness ensures the spade head maintains its integrity through countless manual operations without stripping or deformation. The fully threaded 5/16"-18 UNC coarse thread provides maximum thread contact surface area, delivering superior holding power in soft materials and preventing cross-threading during quick installations. Engineered for manual fastener applications, the generous head dimensions (7/8" width, 11/16" height) offer exceptional torque transmission while the Class 2A thread fit guarantees consistent performance across production runs, reducing assembly time and improving operational efficiency in manufacturing environments.
Specification Summary & Compliance
This inch-system thumb screw features 5/16"-18 UNC coarse threads with Class 2A tolerance for precision fit, manufactured from high-strength steel with Rockwell B55 hardness and 40,000 psi tensile strength. The product is fully threaded with right-hand direction and complies with RoHS 3 (2015/863/EU) environmental regulations for industrial applications.
