{"product_id":"hillman-fasteners-812587-carriage-bolt-3-8-16-x-4-in-50-pack","title":"Hillman Fasteners 812587 Carriage Bolt 3\/8-16 X 4 in 50 Pack","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HILLMAN FASTENERS 812587 is a galvanized steel carriage bolt used to create secure, tamper-resistant fastened connections in structural and general trade applications. Each bolt features a round head, square neck, and coarse thread pattern in a 3\/8-16 x 4-inch configuration. The square neck locks into wood or soft material to prevent spinning during installation, eliminating the need for a wrench on the bolt side. Sold in a 50-count box, this SKU is suited for contractors and tradespeople who need reliable fasteners in volume. The galvanized coating provides corrosion resistance for both interior and exterior use.\u003c\/p\u003e\u003cp\u003eThis carriage bolt is commonly used in wood-to-wood and wood-to-metal connections across residential and light commercial construction. Typical applications include decking, fencing, framing, HVAC equipment mounting, and electrical or plumbing support structure assembly. The 3\/8-16 coarse thread pattern is standard for general structural fastening where high vibration or fine-thread engagement is not required. The 50-pack quantity suits service vans, job-site bins, and supply rooms where replenishing common fastener sizes frequently.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/8-16 x 4-inch galvanized steel carriage bolt for corrosion-resistant structural fastening\u003c\/li\u003e\n\u003cli\u003eRound head with square neck prevents bolt rotation during nut tightening\u003c\/li\u003e\n\u003cli\u003eCoarse thread pattern for fast engagement in wood and soft-base materials\u003c\/li\u003e\n\u003cli\u003eGalvanized finish rated for interior and exterior environments\u003c\/li\u003e\n\u003cli\u003e50-count pack supports volume fastening tasks and job-site restocking\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard 3\/8-16 coarse-thread carriage bolt suitable for use with any 3\/8-16 hex nut and standard flat or lock washer in structural wood and light metal fastening applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eCarriage bolts are typically installed by tradespeople and general contractors using a hammer to seat the square neck flush into the substrate, then securing with a 3\/8-16 hex nut and washer using a wrench or socket. Always pre-drill a hole matching the bolt shank diameter to prevent splitting in wood substrates. Follow applicable building codes, including IBC or local structural requirements, when using carriage bolts in load-bearing assemblies. Torque to specification per the project engineer or applicable code — do not over-drive, as this can strip the square neck seat.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Style\u003c\/strong\u003e: Round Head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Style\u003c\/strong\u003e: Square Neck\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Coarse\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Galvanized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 12.5 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HILLMAN FASTENERS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 812587\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HILLMAN","offers":[{"title":"Default Title","offer_id":51559007420722,"sku":"812587","price":95.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a9aca8f191d19b3273a5ee28d9093e57_b5f0faaa-3842-4d80-90f7-cf14a705ecf8.jpg?v=1786425561","url":"https:\/\/voomisupply.com\/products\/hillman-fasteners-812587-carriage-bolt-3-8-16-x-4-in-50-pack","provider":"Voomi Supply","version":"1.0","type":"link"}