{"product_id":"value-collection-d39459-hex-cap-screw-5-8-18-x-5-in-grade-8","title":"Value Collection D39459 Hex Cap Screw 5\/8-18 X 5 in Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION D39459 is a Grade 8 steel hex head cap screw with a 5\/8-18 UNF thread and a 5-inch length under head. It features a zinc yellow dichromate finish that provides corrosion resistance in moderate-exposure environments. The screw is partially threaded and manufactured to ASME B18.2.1 dimensional standards, ensuring consistent head geometry and thread tolerances. This fastener is suited for high-strength bolted assemblies where a fine-thread pitch is required for precise clamping force and resistance to loosening under vibration. Machinists, millwrights, and maintenance technicians typically specify Grade 8 hardware in this configuration for structural and mechanical applications.\u003c\/p\u003e\n\u003cp\u003eThis cap screw is used in industrial machinery, heavy equipment, and structural assemblies where high tensile strength and fine thread engagement are critical. The 5\/8-18 UNF designation indicates a fine-thread series, which offers greater thread engagement per inch compared to coarse-thread equivalents and is preferred when working with thin-walled materials or when precise torque control is required. The partial threading allows a smooth shank to bear shear loads in bolted joints.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 8 steel construction for high tensile and proof load strength\u003c\/li\u003e\n  \u003cli\u003e5\/8-18 UNF fine-thread series for precise torque control and vibration resistance\u003c\/li\u003e\n  \u003cli\u003eZinc yellow dichromate finish for corrosion and oxidation resistance\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank to accommodate shear-loaded bolted joints\u003c\/li\u003e\n  \u003cli\u003eManufactured to ASME B18.2.1 for consistent head dimensions and tolerances\u003c\/li\u003e\n  \u003cli\u003e5-inch length under head suits deeper grip applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard 5\/8-inch UNF bolted assemblies requiring ASME B18.2.1 compliant hex head cap screws with Grade 8 strength ratings.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by machinists, millwrights, or maintenance technicians using a standard hex wrench or impact driver with the appropriate 15\/16-inch socket. Always use a hardened flat washer under the head when the mating surface is softer than Grade 8 steel. Verify that the mating nut or tapped hole is rated for the Grade 8 load before assembly. Follow applicable torque specifications from the equipment manufacturer or relevant engineering standards.\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: 5 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: Partially 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\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: D39459\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51697590239538,"sku":"D39459","price":80.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/18fb911a7eb5e38dea3b068bc4bc7ca4.jpg?v=1788353139","url":"https:\/\/voomisupply.com\/products\/value-collection-d39459-hex-cap-screw-5-8-18-x-5-in-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}