These durable 5/16""-18 female threaded star knobs are designed for secure, tool-free adjustments on woodworking equipment, machinery, jigs, fixtures, and shop tools. Made from high-quality black nylon with galvanized carbon-steel threaded inserts, each knob provides a comfortable grip, dependable thread engagement, and long-lasting performance. The through-thread design allows a compatible threaded rod or bolt to pass completely through the knob and extend from the top, providing a wider adjustment range. Features Standard 5/16""-18 Female Thread Fits compatible 5/16""-18 threaded rods, bolts, studs, and machine components. Through-Thread Design Allows a threaded rod or bolt to pass fully through the knob for greater adjustment flexibility. Durable Construction High-quality nylon body with a galvanized carbon-steel insert for strength, toughness, and reliable long-term use. Comfortable 5-Star Grip Ergonomic star-shaped design provides a secure, non-slip grip for easy tightening and loosening by hand. Tool-Free Adjustment Ideal for applications requiring frequent positioning, tightening, or removal. Specifications Product Type: Female Thread Through Star Knob Quantity: 16 Color: Black Material: Nylon and Galvanized Carbon Steel Thread Size: 5/16""-18 Thread Diameter: 5/16"" / 0.312"" / 7.938 mm Threads Per Inch: 18 TPI Thread Pitch: Approximately 0.056"" / 1.41 mm Head Diameter: 1.57"" / 40 mm Overall Height: 0.61"" / 15.5 mm Knob Shape: Five-Star Thread Style: Through Thread Common Applications Suitable for: Drill presses Lathes Table saws Featherboards Fences and guides Woodworking jigs Fixtures Mechanical equipment Instruments and apparatus Machine guards Shop tools Industrial equipment Replacement adjustment knobs Package Includes 16 × Black 5/16""-18 Female Thread Star Knob Handles