{"product_id":"value-collection-5188ch8o-hex-cap-screw-1-2-20-x-5-1-2-in-grade-8","title":"Value Collection 5188CH8O Hex Cap Screw 1\/2-20 X 5-1\/2 in Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 5188CH8O is a partially threaded hex head cap screw engineered for high-strength fastening applications. It is manufactured from Grade 8 steel and finished with a zinc yellow dichromate coating that provides corrosion resistance in demanding environments. The screw measures 1\/2-20 UNF thread size with a 5-1\/2 inch length under head, making it well suited for heavy-duty mechanical assemblies. With a tensile strength of 150,000 psi, it meets the requirements of ASME B18.2.1 and SAE J429. Installed with a 3\/4 inch hex key or wrench, this fastener is a dependable choice for industrial and structural fastening work.\u003c\/p\u003e\n\u003cp\u003eThis fastener is appropriate for use in industrial machinery, structural steel assemblies, agricultural equipment, automotive applications, and other heavy-duty mechanical systems where high-clamp-load and torque resistance are required. The partial threading allows the unthreaded shank to bear shear loads, which is an advantage in joint designs that demand precise alignment or load distribution across the grip length. Maintenance technicians, millwrights, and mechanical contractors routinely spec Grade 8 fasteners like this one for critical bolted connections.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 8 steel construction with 150,000 psi tensile strength for high-load fastening\u003c\/li\u003e\n  \u003cli\u003eZinc yellow dichromate finish for corrosion protection in industrial environments\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank allows the grip length to carry shear loads\u003c\/li\u003e\n  \u003cli\u003e1\/2-20 UNF thread form for fine-thread engagement and superior vibration resistance\u003c\/li\u003e\n  \u003cli\u003eMeets ASME B18.2.1 and SAE J429 dimensional and mechanical standards\u003c\/li\u003e\n  \u003cli\u003e3\/4 inch hex drive compatible with standard wrenches and sockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard inch-series hex head cap screw for use in any application requiring a 1\/2-20 UNF partially threaded fastener with a 5-1\/2 inch length under head and Grade 8 mechanical properties.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed with a 3\/4 inch open-end, box, or socket wrench. De-energize, depressurize, or otherwise render safe any equipment before removing or replacing structural fasteners. Apply fastener torque values per the joint designer's specification or applicable engineering standards — do not estimate torque without reference data for the specific joint. Inspect threads and mating surfaces for damage before assembly; replace any fastener that shows signs of thread galling, corrosion, or mechanical deformation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 5-1\/2 inches\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: 8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTensile Strength\u003c\/strong\u003e: 150,000 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Coating\u003c\/strong\u003e: Zinc Yellow Dichromate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Key Size\u003c\/strong\u003e: 3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ASME B18.2.1, SAE J429\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: 0.34 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: 5188CH8O\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51689624011058,"sku":"5188CH8O","price":4391.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c45cfe477c3f043ad3c5938231dc3ad8.jpg?v=1788262024","url":"https:\/\/voomisupply.com\/products\/value-collection-5188ch8o-hex-cap-screw-1-2-20-x-5-1-2-in-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}