{"product_id":"value-collection-r52001349-flat-head-machine-screw-1-2-13x4","title":"Value Collection R52001349 Flat Head Machine Screw 1\/2-13x4","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION R52001349 is a 1\/2-13 x 4 inch flat head slotted machine screw manufactured from steel with a zinc-plated finish. Conforming to ASME B18.6.3 and SAE J82 standards, this screw is suited for general industrial and mechanical fastening applications where a flush or countersunk installation is required. The 1\/2-13 thread designation indicates a 1\/2 inch nominal diameter with 13 threads per inch, UNC coarse thread series. Zinc plating provides a baseline level of corrosion resistance for interior and light-duty exterior environments. Installed by maintenance technicians, millwrights, and trade professionals across a wide range of assembly and repair tasks.\u003c\/p\u003e\u003cp\u003eThis screw is appropriate for structural and mechanical assembly applications where a countersunk flat head profile is needed to sit flush with or below the mating surface. The slotted drive accommodates standard flat-blade screwdrivers, making it accessible with common hand and power tools. The 4 inch overall length and coarse 1\/2-13 thread make it a practical choice for fastening through thicker material stacks in equipment enclosures, frames, and general fabrication work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-13 UNC coarse thread for broad compatibility with standard tapped holes\u003c\/li\u003e\n\u003cli\u003e4 inch overall length with full 4 inch length under head\u003c\/li\u003e\n\u003cli\u003eFlat head profile for flush or countersunk installation\u003c\/li\u003e\n\u003cli\u003eSlotted drive compatible with standard flat-blade screwdrivers\u003c\/li\u003e\n\u003cli\u003eZinc-plated steel construction for general-purpose corrosion resistance\u003c\/li\u003e\n\u003cli\u003eMeets ASME B18.6.3 and SAE J82 dimensional and material standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard 1\/2-13 UNC tapped holes in steel, aluminum, and similar materials where a flat head slotted machine screw meeting ASME B18.6.3 is specified.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed with a properly sized flat-blade screwdriver or bit to avoid cam-out and drive damage. Ensure the receiving hole is correctly tapped to 1\/2-13 UNC and the countersink angle matches the flat head profile before driving. Apply appropriate thread lubricant or anti-seize compound when fastening into dissimilar metals to prevent galling. Follow applicable mechanical codes and torque specifications for the assembly being serviced.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength (Overall)\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Flat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Slotted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: J82\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWasher Style\u003c\/strong\u003e: Without Washer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME B18.6.3 \/ SAE J82\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161504\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: R52001349\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51695137128754,"sku":"R52001349","price":4785.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/54be09a5c477aaa63aed14d37e967ba9_fadfaabe-7063-44dc-8dec-dc45e116a178.jpg?v=1788331609","url":"https:\/\/voomisupply.com\/products\/value-collection-r52001349-flat-head-machine-screw-1-2-13x4","provider":"Voomi Supply","version":"1.0","type":"link"}