{"product_id":"value-collection-451137br-hex-head-cap-screw-5-8-18-grade-8","title":"Value Collection 451137BR Hex Head Cap Screw 5\/8-18 Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 451137BR is a partially threaded hex head cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. Built to Grade 8 steel specifications, this fastener delivers superior tensile strength compared to lower-grade hardware. The bright uncoated finish exposes the bare steel surface, making it a standard choice where coating thickness or chemical compatibility is a concern. It measures 5\/8-18 thread size with a 9-1\/2 inch length under the head and conforms to ASME B18.2.1 standards. Installation requires a 5\/16 inch hex key or appropriate socket drive. Tradespeople and maintenance technicians reach for Grade 8 fasteners when joint integrity under heavy load or vibration is required.\u003c\/p\u003e\n\u003cp\u003eThis cap screw suits residential and commercial mechanical installations, heavy equipment maintenance, structural framing connections, and industrial machinery assembly. The UNF thread standard and ASME B18.2.1 compliance make it a recognized fit for precision-threaded applications where fine-thread engagement is specified. Partial threading allows full shank engagement through clearance holes before the threaded section bites into the mating component, which is common in bolted flange and clevis-type connections.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 8 steel construction for high tensile strength under load and vibration\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank for accurate shear-load positioning through clearance holes\u003c\/li\u003e\n  \u003cli\u003eUNF 5\/8-18 thread standard for fine-pitch precision engagement\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish — no coating interference with dimensional tolerances\u003c\/li\u003e\n  \u003cli\u003eConforms to ASME B18.2.1 dimensional standards\u003c\/li\u003e\n  \u003cli\u003e5\/16 inch hex key size for drive compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard ASME B18.2.1 inch-series hex head cap screw suitable for any application specifying a 5\/8-18 UNF Grade 8 partially threaded fastener.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by millwrights, mechanical contractors, or maintenance technicians using a properly rated socket or hex drive tool. Always verify that the mating nut or threaded hole is rated for Grade 8 load requirements before torquing. Follow the applicable fastener torque specifications from the equipment manufacturer or a recognized fastener standard — no torque value is specified here. Inspect threads for damage before installation and never substitute lower-grade hardware in Grade 8 applications.\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: 9-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull or Partial Threading\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 Coating\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Key Size\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASME B18.2.1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.86 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161501\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: 451137BR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51721424666930,"sku":"451137BR","price":26.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/72db789a76512ff4a6edad5e15580034.jpg?v=1788577295","url":"https:\/\/voomisupply.com\/products\/value-collection-451137br-hex-head-cap-screw-5-8-18-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}