{"product_id":"fastenmaster-fmhlgm412-50-headlok-structural-screw-50ct","title":"Fastenmaster FMHLGM412-50 Headlok Structural Screw 50ct","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe FASTENMASTER FMHLGM412-50 is a Headlok heavy-duty structural screw designed for timber-to-timber and wood-to-OSB fastening applications. At 4.5 inches in length with a 0.172-inch diameter, this wafer head screw delivers shear values stronger than standard 3\/8-inch lag screws without requiring a washer. The Spider Drive recess provides maximum bit engagement for controlled, high-torque installation. A sharp gimlet point starts fast without predrilling, and the aggressive thread profile generates high withdrawal strength. Each box contains 50 screws and includes a Spider Drive bit.\u003c\/p\u003e\u003cp\u003eThis screw is used in structural wood framing, ledger board attachment, post-to-beam connections, and deck substructure work. It is suited for residential and light commercial construction where engineered fastener performance is required. The wafer head profile sits flush or near-flush against the wood surface, eliminating the need for a separate washer and reducing installation steps. Carpenters, framers, and deck builders use this fastener where speed and structural integrity are both priorities.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eShear values exceed those of standard 3\/8-inch lag screws\u003c\/li\u003e\n\u003cli\u003eSpider Drive recess delivers high bit engagement and reduced cam-out\u003c\/li\u003e\n\u003cli\u003eSharp gimlet point enables fast starts without predrilling in wood and OSB\u003c\/li\u003e\n\u003cli\u003eAggressive thread profile maximizes holding and withdrawal strength\u003c\/li\u003e\n\u003cli\u003eWafer head with chamfer underneath increases pull-through resistance and eliminates washer requirement\u003c\/li\u003e\n\u003cli\u003eIncludes one Spider Drive bit per box\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for structural fastening applications in wood framing and OSB assemblies typical of residential and light commercial construction.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by carpenters and framers using a drill or impact driver with the included Spider Drive bit. Verify local building code requirements and any applicable IRC or IBC provisions for structural fastener spacing and edge distances before installation. Always use the correct bit to avoid damaging the drive recess and compromising torque transfer.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 0.172 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Wafer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Spider Drive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Gimlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 50 pieces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 2.484 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 00608309410584\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: FASTENMASTER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: FMHLGM412-50\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FASTENMASTER","offers":[{"title":"Default Title","offer_id":51347215745330,"sku":"FMHLGM412-50","price":77.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310548847.jpg?v=1782099329","url":"https:\/\/voomisupply.com\/products\/fastenmaster-fmhlgm412-50-headlok-structural-screw-50ct","provider":"Voomi Supply","version":"1.0","type":"link"}