Four Point Knobs With Half Inch Thirteen UNC Threads And Two Point Zero Nine Inch Threaded Stud Star Clamping Knobs For Hand Tightening Thumb Screw Knob Design For Lawn Mower Umbrella Base Clamps And General Machinery Replacement

Four Point Star Knob with 1/2-13 UNC Threaded Stud
✔️ 1 piece per pack; 1/2-13 UNC thread; 2.09 in screw length

This four point star knob is a hand tightened clamping knob designed for quick, tool-free adjustments in equipment and machinery. It’s built to replace damaged knobs across clamps, base plates, and other fixtures, making setup faster in workshops and on lawn equipment, printers, and cabinets.

✅ Material: plastic body with iron core for strength and corrosion resistance
✅ Thread size: 1/2-13 UNC; screw length 53 mm (2.09 in)
✅ Dimensions: width 44 mm (1.73 in); overall length 82 mm (3.23 in)
✅ Design: star-shaped grip with thickened nut head for smooth rotation
✅ Use: hand tightening, replace damaged knobs; avoid over-tightening to protect threads

💡 What is a hand tightening star knob used for in hardware and machines? This handy fastener helps secure parts quickly without tools. - 1/2-13 UNC threaded stud fits standard fixtures - Great for adjustable clamps, vises, machine platforms, and cabinets - Star grip reduces slipping and improves control during tightening - Durable materials resist rust in workshop environments