{"product_id":"value-collection-d39447-hex-cap-screw-5-8-18-x-1-1-2-grade-8","title":"Value Collection D39447 Hex Cap Screw 5\/8-18 X 1-1\/2 Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION D39447 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assembly work. It is manufactured from Grade 8 steel, the highest commonly specified inch-series fastener grade, delivering a proof load strength suitable for demanding bolted joints. The screw measures 5\/8-18 UNF in thread size with a 1-1\/2 inch length under head. A zinc yellow dichromate finish provides corrosion resistance while serving as a visual identifier for Grade 8 hardware. This fastener conforms to ASME B18.2.1 dimensional standards and is installed by mechanics, millwrights, and general tradespeople across a wide range of applications.\u003c\/p\u003e\n\u003cp\u003eThis hex head cap screw is suited for use in high-load bolted assemblies where fine-thread engagement and Grade 8 strength are required. Fine-thread UNF fasteners offer greater resistance to loosening under vibration compared to coarse-thread equivalents, making this screw appropriate for equipment, machinery, and vehicle or trailer hardware where joint integrity under dynamic loads is a priority. It is sold individually with a minimum order quantity of 10 pieces.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 8 steel construction for high proof load and tensile strength in demanding bolted joints\u003c\/li\u003e\n  \u003cli\u003e5\/8-18 UNF fully threaded profile provides maximum thread engagement over the full 1-1\/2 inch length under head\u003c\/li\u003e\n  \u003cli\u003eZinc yellow dichromate finish delivers corrosion resistance and serves as the standard Grade 8 visual identifier\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME B18.2.1 dimensional standards for consistent fitment with Grade 8 nuts and washers\u003c\/li\u003e\n  \u003cli\u003eFine-thread UNF series resists loosening under vibration better than coarse-thread equivalents\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with 5\/8-18 UNF Grade 8 hex nuts and hardened flat washers in standard inch-series bolted assemblies per ASME B18.2.1.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis fastener is installed by mechanics, millwrights, and tradespeople using a standard hex wrench or socket. Always use a hardened flat washer under the head when bearing surface hardness requires it, and pair with a Grade 8 or equivalent nut. Ensure mating threads are clean and free of debris before assembly. Torque to the value specified by the equipment manufacturer or relevant structural standard for 5\/8-18 Grade 8 fasteners.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/8-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Fully Threaded\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: Grade 8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc Yellow Dichromate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: ASME B18.2.1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1 piece (minimum order quantity: 10)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: D39447\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51716644307250,"sku":"D39447","price":33.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4932d210a32b117b2a415adc5e34a6ad.jpg?v=1788529537","url":"https:\/\/voomisupply.com\/products\/value-collection-d39447-hex-cap-screw-5-8-18-x-1-1-2-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}