15 Pcs 1/4"-20 x 3/4" Thumb Screws, Star Knob Screws with Knurled Grip – Hand Tighten Clamping Knobs for Umbrella Base, Machinery, Furniture – Extra Long 3/4" Thread for Thick Materials

15 Pcs 1/4"-20 x 3/4" Thumb Screws, Star Knob Screws with Knurled Grip – Hand Tighten Clamping Knobs for Umbrella Base, Machinery, Furniture – Extra Long 3/4" Thread for Thick Materials

• 【Tool-Free Hand Tightening – No Wrench Needed】 – Tired of searching for the right wrench or hex key? Our star-shaped thumb screws allow secure hand tightening without any tools. The ergonomic star design provides excellent leverage – simply grip and twist for a firm hold. Will this work in tight spaces? Yes – the 25mm (0.98") knob gives you enough torque while remaining compact for confined areas.
• 【Extra Long 3/4" Thread – For Thicker Materials】 – With a 3/4" (19mm) thread length, these thumb screws provide extra reach for thicker applications where standard 1/2" or 5/8" screws fall short. Will this fit my umbrella base? Yes – 1/4"-20 is the standard thread size for most umbrella base set screws. The longer thread ensures full engagement in thick wood, heavy-duty equipment, and multi-layer installations.
• 【Durable Carbon Steel Thread + Zinc-Plated Finish】 – The threaded shank is made from hardened carbon steel with a zinc-plated finish – wear-resistant and corrosion-resistant. Unlike cheap plastic-threaded knobs that strip or crack, our metal threads provide reliable, long-lasting performance for repeated use. The black plastic knob is lightweight, crack-free, and comfortable to grip.
• 【Precision 1/4"-20 Thread – Standard & Compatible】 – Thread size: 1/4"-20 UNC (standard coarse thread, 20 TPI); Thread length: 3/4" (19mm) – ideal for thick umbrella bases, furniture panels, and machinery mounts; Knob diameter: 25mm (0.98"); Knob thickness: 11mm (0.43"). Please verify your thread size and required length before ordering.
• 【15-Piece Set – Stock Your Workshop】 – Includes 15 thumb screws – enough for multiple projects, replacements, or keeping spares in your workshop. A cost-effective solution for DIY enthusiasts, mechanics, and furniture makers. Add to cart and enjoy hassle-free fastening today.