1 1/2" Wide Clamping Knob. Thickness: 7/16" Has an ergonomic sturdy grip for fast adjustment without a wrench. The ergonomic grip provides strong torque and easy manual operation. 304 Stainless Steel Bolts – highly resistant to corrosion and rust, making them ideal for both indoor and outdoor use, even in harsh environments or areas exposed to moisture. Durable and long-lasting for secure fastening. Versatile Design – Ideal for machinery, plates, panels, jigs, fixtures, and DIY projects; provides quick hand installation and removal for tool-free adjustments in shop, home, or field use. Acetyl Thermoplastic Knob – Hard, durable, chemical- and moisture-resistant material offers lightweight, non-conductive performance for easy tightening. Built in USA by Family-Owned Small Business, Backed by a Lifetime Warranty 5/16" Thumb Screw Bolts with Black Fluted Round Grip for Clamping (4 & 8 Packs Available) Stainless Steel 18-8 Product Details: Thread Size: 5/16-18 (Coarse Thread) Lengths Available: 1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 2 1/2", 3", 3 1/2" Clamping Knob Finger Grip: 1 1/2" wide, 3/8" thick for comfort Material: 18-8 Stainless Steel Pack Options: 4-Pack, 8-Pack Features & Benefits: Versatile Thumb Screws: Ideal for industrial, mechanical, and DIY applications. Thumb screws allow for quick, tool-free fastening and adjustments. Durable 18-8 Stainless Steel: Made from high-grade 18-8 stainless steel for resistance to corrosion and wear, ensuring longevity even in harsh environments. Ergonomic Finger Grip: The 1 1/2" wide, 3/8" thick grip offers comfort and ease of use, reducing hand strain during installation and removal. Multiple Length Options: Available in a variety of lengths, from 1/2" to 3 1/2", making these thumb screws perfect for a range of applications where precision and adjustability are required. Tool-Free Clamping: No wrench required—simply tighten or loosen with your hand. This feature is essential for applications in tight spaces where using a traditional tool is impractical. Ideal for Repeated Use: These thumb screws are perfect for projects requiring frequent removal and reinstallation, reducing the risk of damaged fasteners and improving efficiency. Common Uses: Secure panels, vices, clamps, router tables, camera tripods, power tools, woodworking jigs, tile saws, chop saws, and microphone stands. Great for workshops, maintenance, and assembly line applications. Perfect for maintenance technicians, DIYers, and industrial professionals who need a reliable, easy-to-use fastener for repetitive tasks. These thumb screw bolts can be used in both temporary and permanent installations where ease of use and secure fastening are essential.