28 Sets M4 M5 M6 M8 Star Hand Knob Tightening Screws With Nuts And Washers Stainless Steel Thread Clamping Knobs Quick Removal Replacement Parts Kit For Machinery And DIY Projects

28-Set Star Knob Screws with Nuts & Washers for Machinery
✔️ 28-set with M4, M5, M6, M8 40mm studs, nuts & washers

These star knob screws are handy clamps used to secure jigs, fixtures, and equipment in workshops and manufacturing setups. The set includes four thread sizes (M4, M5, M6, M8) with 40mm studs, plus nuts and washers for secure, quick mounting.

✅ Package contents: 10x M4x40, 10x M5x40, 4x M6x40, 4x M8x40 star knob screws, 28 nuts, 28 washers
✅ Head is PP plastic; stud is steel with zinc plating for wear and corrosion resistance
✅ Hex-style design provides easy grip for hand tightening and removal
✅ Head diameters: M8 ~32mm; M4/M5/M6 ~25mm
✅ Dimensions are metric: all sizes are in millimeters (mm)

💡 What is a hand tightening star knob used for in machinery and fixtures?

Hand tightening star knobs offer quick, tool-free clamping for handy adjustments in shop and assembly workflows.

• Handy for securing jigs, fixtures, mounting plates, and lightweight components
• Fast tool-free tightening speeds up setups and changeovers
• Durable PP head and zinc-plated steel stud resist wear
• Works with M4, M5, M6, and M8 threaded studs across common sizes