FINE THREAD 1 3/4" 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 3/8"-24 Fine Thread Thumb Screw Bolts with Red Butterfly Tee Wing Clamping Knob Description: These 3/8"-24 fine thread thumb screw bolts come with a red butterfly tee wing clamping knob, designed for easy, tool-free hand adjustments. With a 1-inch length, these bolts ensure precise and secure fastening, ideal for applications requiring frequent tightening and loosening. The red butterfly wing knob offers a comfortable, slip-resistant grip, making these bolts perfect for tight spaces and projects needing regular adjustments. Key Features: Fine Thread: 3/8"-24 thread for secure, precision fastening Ergonomic Butterfly Knob: Red tee wing knob for comfortable hand-tightening Compact Length: 1 inch, suitable for versatile applications Durable Design: Reliable for frequent use in both industrial and DIY projects Perfect for machinery, electronics, woodworking, and more, these thumb screw bolts provide a practical, professional clamping solution for various fastening needs. - Head Type: Tee Head - Head Type: Tee Head