{"product_id":"value-collection-581443pr-hex-socket-cap-screw-5-16-18","title":"Value Collection 581443PR Hex Socket Cap Screw 5\/16-18","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 581443PR is a partially threaded hex socket cap screw designed for high-strength fastening applications requiring a recessed drive interface. Sized at 5\/16-18 UNC with a 6.5-inch length under the head, this fastener is driven with a 1\/4-inch hex key. Constructed from alloy steel and finished with a black oxide coating, it resists corrosion and reduces light reflection in service environments. The ASME\/ANSI B18.3 and ASTM A574 standards govern its dimensional and mechanical requirements, making it a recognized choice for structural and mechanical assemblies where verified fastener performance is required.\u003c\/p\u003e\n\u003cp\u003eThis cap screw is suited for machine assembly, jig and fixture fabrication, tooling plates, and general mechanical installations where a flush or countersunk head profile and positive hex drive engagement are needed. The partial threading allows for a strong clamping zone through unthreaded shank engagement in close-tolerance bored holes. Machinists, millwrights, maintenance technicians, and fabricators commonly install this fastener in both production and field-repair settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/16-18 UNC thread size for broad compatibility with standard tapped holes\u003c\/li\u003e\n  \u003cli\u003e6.5-inch length under head accommodates deep grip or stacked-material applications\u003c\/li\u003e\n  \u003cli\u003ePartial threading provides full shank engagement in close-tolerance through-holes\u003c\/li\u003e\n  \u003cli\u003e1\/4-inch hex socket drive for use with standard hex keys and socket bits\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction meets ASTM A574 mechanical strength requirements\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides mild corrosion resistance and low-glare appearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or standard-fitment fastener for any application requiring a 5\/16-18 UNC hex socket cap screw conforming to ASME\/ANSI B18.3 dimensional standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed with a 1\/4-inch hex key or compatible bit driver. Ensure the tapped hole thread is clean and free of debris before seating the fastener. Apply appropriate thread lubricant or thread-locking compound as required by the assembly specification. Do not exceed the torque value specified by the equipment manufacturer or applicable engineering documentation for this thread size and material grade.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 6.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex Socket\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME\/ANSI B18.3, ASTM A574\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.14 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: 581443PR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51693459996978,"sku":"581443PR","price":5230.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0c2ba47c66c185ddd5ebf44efa2dd141.jpg?v=1788312694","url":"https:\/\/voomisupply.com\/products\/value-collection-581443pr-hex-socket-cap-screw-5-16-18","provider":"Voomi Supply","version":"1.0","type":"link"}