S-90179A591 5/16"-18 x 2" Thumb Screws

Key Features & Benefits at a Glance

• High-torque manual operation with spade head design and 3/4" head height for secure grip without tools
• Exceptional load-bearing capacity with 40,000 psi tensile strength for heavy-duty applications
• Superior wear resistance from Rockwell B55 hardness steel construction
• Reliable thread engagement with Class 2A coarse UNC threads ensuring consistent fastening
• Enhanced stability and distribution through integrated flange design (0.563" diameter)
• Full-length threading for maximum engagement depth and holding power
• Right-hand thread direction for standard industrial installation procedures

Professional Applications & Engineering Value

This 5/16"-18 UNC steel thumb screw solves critical industrial fastening challenges where tool-free assembly and disassembly are essential. The spade head design combined with substantial head dimensions (3/4" height, 11/16" width) provides exceptional manual torque application for maintenance panels, access covers, and machinery guards. The coarse thread spacing and Class 2A thread fit ensure rapid installation while maintaining precision alignment in vibration-prone environments. The flanged construction distributes clamping force evenly, preventing surface damage while the fully threaded shank maximizes connection integrity. Engineered for manufacturing equipment, electronic enclosures, and industrial controls, this thumb screw delivers reliable performance where frequent access is required.

Specification Summary & Compliance

Manufactured to UNC coarse thread standards with Class 2A thread fit for consistent dimensional accuracy. The 5/16"-18 thread size features 0.313" diameter with right-hand threading. Complies with industrial fastening specifications and material standards for steel components. The 2" length and fully threaded design provide versatile application coverage across industrial and equipment fastening requirements.