S-91746A612 5/16"-18 x 1 1/2" 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
- Superior grip and tool-free operation with knurled round head design for easy manual tightening and loosening
- Excellent corrosion resistance thanks to 18-8 Stainless Steel construction for long-lasting performance in harsh environments
- High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for reliable load-bearing applications
- Precision threading compatibility with Class 2A UNC coarse threads ensuring secure fastening and easy assembly
- Full-length threading provides maximum engagement and adjustment flexibility across the entire screw length
- Regulatory compliance assurance with RoHS 3 and REACH standards for safe use in regulated industries
- Right-hand thread direction offers standard, intuitive installation familiar to most operators
Professional Applications & Engineering Value
This 5/16"-18 UNC thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-free access. The 18-8 Stainless Steel construction provides inherent corrosion resistance, making it ideal for electronics enclosures, machinery guards, and outdoor equipment where environmental exposure is a concern. The knurled head texture ensures positive grip even with gloved hands or in oily conditions, eliminating the need for specialized tools and reducing maintenance downtime. With its Class 2A thread fit and coarse UNC threading, this fully threaded fastener offers quick installation and reliable performance in vibration-prone industrial settings, while the narrow round-head profile saves space in compact assemblies.
Specification Summary & Compliance
This thumb screw features 5/16"-18 UNC coarse threading with Class 2A thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and interchangeability. The fastener is manufactured from 18-8 Stainless Steel with full threading along its 1-1/2" length. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental safety and restricted substance adherence for global industrial applications.
