{"product_id":"value-collection-r52001031-1-4-20-unc-machine-screw","title":"Value Collection R52001031 1\/4-20 Unc Machine Screw","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION R52001031 is a 1\/4-20 UNC Phillips drive pan head machine screw designed for general fastening applications across mechanical, electrical, and structural assemblies. The screw measures 1\/2 inch in length under the head and is manufactured from Grade J82 steel with a zinc-plated finish for corrosion resistance in standard indoor environments. An integrated external tooth lock washer style provides added resistance to loosening under vibration. This fastener is a reliable choice for trade professionals who need a code-compliant, industry-standard threaded fastener in quantity.\u003c\/p\u003e\u003cp\u003eThis machine screw is suited for use in residential and light commercial applications including electrical panel assembly, HVAC component mounting, plumbing fixture brackets, and general equipment fabrication. The 1\/4-20 UNC thread form is one of the most common unified coarse thread standards, making this screw compatible with a wide range of pre-tapped holes, nuts, and threaded inserts across trade disciplines. It is commonly installed by electricians, HVAC technicians, and plumbers during equipment installation and service work.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-20 UNC thread form — one of the most widely used coarse thread standards in trade applications\u003c\/li\u003e\n\u003cli\u003e1\/2 inch length under head for shallow-clearance fastening situations\u003c\/li\u003e\n\u003cli\u003ePhillips drive pan head for quick installation with standard bit drivers\u003c\/li\u003e\n\u003cli\u003eGrade J82 steel construction for reliable tensile strength in general-duty use\u003c\/li\u003e\n\u003cli\u003eZinc-plated finish provides basic corrosion protection in dry or low-humidity environments\u003c\/li\u003e\n\u003cli\u003eExternal tooth lock washer style resists loosening under vibration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose 1\/4-20 UNC threaded fastener compatible with standard pre-tapped holes, hex nuts, and threaded inserts requiring a 1\/4-20 coarse thread pattern.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a standard Phillips bit driver or screwdriver sized for a 1\/4-20 pan head fastener. Ensure the mating thread or nut is also rated for 1\/4-20 UNC before installation. De-energize any electrical equipment before fastening components in live panels or enclosures. Do not overtighten into plastic or soft substrates, as the steel thread can strip the mating material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Phillips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Style\u003c\/strong\u003e: Pan Head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Grade J82 Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWasher Style\u003c\/strong\u003e: External Tooth\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: R52001031\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51724003442994,"sku":"R52001031","price":1256.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/afd6f17aeaaeaccc60f1a536037da71c.jpg?v=1788611384","url":"https:\/\/voomisupply.com\/products\/value-collection-r52001031-1-4-20-unc-machine-screw","provider":"Voomi Supply","version":"1.0","type":"link"}