{"product_id":"national-marker-n220830-heavy-duty-screw-hook-3-8x4-5-in","title":"National Marker N220830 Heavy-duty Screw Hook 3\/8x4.5 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe NATIONAL MARKER N220830 is a heavy-duty screw hook designed for secure fastening and hanging applications in trade and industrial environments. Featuring a lag screw thread profile, this hook drives directly into wood framing, structural members, or similar substrates without a pre-drilled pilot hole in most softwood applications. Constructed from steel with a zinc finish, it resists corrosion in typical indoor and light-duty outdoor conditions. At 3\/8 inches in diameter and 4-1\/2 inches in length, it provides substantial holding capacity for suspending pipe, conduit, cable, equipment, or signage.\u003c\/p\u003e\u003cp\u003eThis screw hook is suited for residential and commercial construction, HVAC duct and pipe suspension, electrical conduit support, and general facility maintenance tasks. Its lag thread design makes it a practical choice for electricians, plumbers, HVAC technicians, and general contractors who need a reliable overhead or wall-mounted hanging point. The zinc finish adds a layer of protection appropriate for utility spaces, mechanical rooms, and similar environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLag screw thread for direct drive into wood substrates\u003c\/li\u003e\n\u003cli\u003eSteel construction for reliable load-bearing performance\u003c\/li\u003e\n\u003cli\u003eZinc finish for corrosion resistance in light-duty environments\u003c\/li\u003e\n\u003cli\u003e3\/8 inch diameter shank provides solid grip in framing members\u003c\/li\u003e\n\u003cli\u003e4-1\/2 inch length offers deep thread engagement for increased holding strength\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose lag screw hook suitable for wood framing, blocking, and structural lumber applications common in mechanical, electrical, and plumbing installations.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by electricians, plumbers, HVAC technicians, or general contractors using a standard wrench or pliers on the hook shank. A pilot hole is recommended in hardwood or dense lumber to prevent splitting and ensure proper thread engagement. Always verify the substrate load rating before suspending equipment or pipe runs. Follow applicable building and mechanical codes for hanger spacing and support intervals.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 4-1\/2 inches\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: Zinc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Lag screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.175 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold As\u003c\/strong\u003e: Each\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: NATIONAL MARKER\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: N220830\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NATIONAL MARKER","offers":[{"title":"Default Title","offer_id":51344990110002,"sku":"N220830","price":39.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310550319.jpg?v=1782047441","url":"https:\/\/voomisupply.com\/products\/national-marker-n220830-heavy-duty-screw-hook-3-8x4-5-in","provider":"Voomi Supply","version":"1.0","type":"link"}