S-91746A451 3/8"-16 x 1" 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 knurled 0.875" head for easy, tool-free operation in tight spaces
- Exceptional corrosion resistance from 18-8 stainless steel construction for long service life in harsh environments
- High-strength performance with 80,000 psi tensile strength and Rockwell B83 hardness for demanding applications
- Reliable thread engagement with 3/8"-16 UNC coarse threads and Class 2A fit for secure fastening
- Optimized low-profile design with round head for applications with limited clearance requirements
- Partial threading versatility allowing for precise adjustment and positioning control
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for global industrial use
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw solves critical industrial challenges where tool-free access and corrosion resistance are paramount. The knurled head texture provides exceptional grip even with oily hands or gloves, eliminating the need for tools in maintenance panels, machine guards, and electronic enclosures. Its low-profile round head design prevents snagging while the 3/8"-16 UNC coarse threads ensure quick installation and removal in soft materials or pre-tapped holes. The partial threading allows for precise clamping force control in jigs, fixtures, and adjustment mechanisms. Engineered for industrial thumb screw applications requiring frequent access, this fastener maintains integrity in manufacturing, automotive, and electronic assemblies where moisture, chemicals, or frequent adjustments would compromise ordinary fasteners.
Specification Summary & Compliance
This thumb screw maintains Class 2A thread fit tolerance for consistent engagement and features right-hand UNC coarse threads (3/8"-16) with 15/16" threaded length. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. The 18-8 stainless steel construction provides reliable performance with 80,000 psi tensile strength and Rockwell B83 hardness, suitable for various industrial standards and manual fastening requirements.
