{"product_id":"electro-hardware-ths3054m10f21-steel-thumb-screw-1-4-20","title":"Electro Hardware THS3054M10F21 Steel Thumb Screw 1\/4-20","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ELECTRO HARDWARE THS3054M10F21 is a steel thumb screw with a knurled head, designed for tool-free fastening in light-duty mechanical assemblies. It features a 1\/4-20 UNC thread pattern and measures 7\/8 inch overall length, with a 1\/2 inch head diameter and 1\/4 inch head height. The knurled head provides finger grip for hand-tightening without a driver. Finished in zinc per ASTM B633, it offers basic corrosion resistance suitable for indoor and light industrial environments. This fastener is installed by HVAC technicians, electricians, plumbers, and general maintenance professionals wherever a removable, tool-free panel fastener is needed.\u003c\/p\u003e\n\u003cp\u003eThis thumb screw is used in applications requiring frequent access, such as electrical enclosure panels, equipment covers, junction boxes, and HVAC access doors. The 1\/4-20 UNC thread is one of the most common fastener standards in North American trade work, making this screw a straightforward fit for repair and replacement scenarios across multiple trades. It is sold individually per package, with a minimum order of 2 units.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC thread for broad compatibility with standard tapped holes\u003c\/li\u003e\n  \u003cli\u003eKnurled head allows tool-free hand tightening and removal\u003c\/li\u003e\n  \u003cli\u003e7\/8 inch overall length with a 5\/8 inch thread length\u003c\/li\u003e\n  \u003cli\u003eZinc finish per ASTM B633 for corrosion resistance in indoor environments\u003c\/li\u003e\n  \u003cli\u003eGrade 2 steel construction for reliable light-duty clamping force\u003c\/li\u003e\n  \u003cli\u003eNo shoulder design for direct thread engagement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 1\/4-20 UNC thumb screw for use in any application with a compatible tapped or threaded hole of that size. Suitable for use in equipment panels, enclosures, and access covers that accept 1\/4-20 fasteners.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003ePower down or de-energize any equipment before removing or replacing panel fasteners on electrical or HVAC enclosures. Hand-tighten only — do not use a driver or wrench on the knurled head, as this may damage the head or strip the thread. Verify thread engagement depth is sufficient for the panel thickness before finalizing installation. Follow applicable NEC or equipment manufacturer guidelines when fastening electrical enclosure covers.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 7\/8 inch (0.875 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 5\/8 inch (0.625 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Knurled\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 1\/2 inch (0.500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 1\/4 inch (0.250 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShoulder Type\u003c\/strong\u003e: Without Shoulder\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASTM B633, QQ-S-633 Type 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161516\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ELECTRO HARDWARE\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: THS3054M10F21\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ELECTRO HARDWARE","offers":[{"title":"Default Title","offer_id":51731880935730,"sku":"THS3054M10F21","price":21.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/089603be8ed25c382e5b06b448da7164_79f1bdee-b823-4f4e-b15c-1d3d8576e30d.jpg?v=1788736004","url":"https:\/\/voomisupply.com\/products\/electro-hardware-ths3054m10f21-steel-thumb-screw-1-4-20","provider":"Voomi Supply","version":"1.0","type":"link"}