S-91746A784 5/16"-18 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and tool-free operation with knurled round head design for secure manual tightening in confined spaces
• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or corrosive industrial environments
• High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for reliable load-bearing performance
• Quick installation and secure fastening with 5/16"-18 UNC coarse thread and Class 2A fit ensuring smooth engagement
• Versatile partial threading allowing unthreaded shank section for precise alignment in assembly applications
• Compliance with global standards including RoHS 3 and REACH for environmentally responsible manufacturing
• Dual drive compatibility featuring both thumb-operated knurling and slotted drive for flexible installation methods

Professional Applications & Engineering Value

This 18-8 stainless steel thumb screw delivers exceptional engineering value through its optimized material selection and functional design. The knurled round head provides superior tactile grip for repeated manual adjustments in maintenance panels, electronic enclosures, and machinery access points where tools are impractical. The 5/16"-18 UNC coarse thread with Class 2A fit ensures rapid installation while maintaining precise thread engagement, significantly reducing assembly time in production environments. The partially threaded design prevents cross-threading during initial alignment, while the low-profile head maintains clearance in space-constrained applications. Manufactured from corrosion-resistant 18-8 stainless steel, this thumb screw maintains reliability in demanding conditions including outdoor equipment, marine components, and chemical processing facilities where moisture and corrosive elements are present.

Specification Summary & Compliance

This thumb screw features precision 5/16"-18 UNC coarse threads with Class 2A thread fit ensuring consistent dimensional accuracy and reliable performance. The right-hand thread direction and 1 7/16" thread length provide optimal engagement depth for secure fastening. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted hazardous substances. The combination of 80,000 psi tensile strength and Rockwell B83 hardness guarantees mechanical durability across repeated use cycles in industrial applications.