Technical description for the 1/4-20 x 1/2 inch Thumb Screws with shoulder head, knurled drive, full thread, steel construction, and zinc plating. Bulk package of 800 pieces. Specs Thread size: 1/4-20 Diameter: 1/4 inch Length: 1/2 inch Head type: Shoulder Drive: Knurled Thread type: Full thread Material: Steel Finish: Zinc plated Package quantity: 800 per package Features Knurled drive enables finger-tight operation without tools, aiding quick adjustments Shoulder head provides a defined seating surface for panels and fixtures Full-thread length ensures consistent engagement along the screw shank Steel construction offers reliable strength for general mounting tasks Zinc plating provides corrosion resistance suitable for indoor or light-duty use Bulk packaging supports production runs, stocking, and repeat installations Physical Overall length: 1/2 inch Head style: Shoulder Drive type: Knurled Material: Steel Finish: Zinc plated Thread: Full thread Count per package: 800 Industry Used In Electronics enclosures and chassis assembly IT and network cabinet installations Industrial machinery and fixture mounting Furniture hardware and panel assembly Automotive interior trim and dashboard applications DIY and prototyping projects