{"product_id":"value-collection-r50000021-hex-lock-nut-5-16-18","title":"Value Collection R50000021 Hex Lock Nut 5\/16-18","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION R50000021 is a 5\/16-18 UNC hex lock nut with a nylon insert locking mechanism, manufactured from Grade 2 steel with a zinc-plated finish. The nylon insert creates interference with the mating thread, resisting loosening caused by vibration and torque load without deforming the fastener itself. This nut measures 17\/64 inches in height with a 1\/2-inch width across the flats, and weighs approximately 0.008 pounds. It is suited for general mechanical and structural assembly applications across HVAC, plumbing, and light industrial work where a reliable, reusable locking fastener is required.\u003c\/p\u003e\n\u003cp\u003eThis hex lock nut is used in residential and commercial applications wherever a 5\/16-18 UNC threaded fastener connection requires vibration resistance. Common installation scenarios include equipment panel assembly, bracket fastening, motor mounting, and other mechanical connections subject to intermittent vibration or dynamic loading. The right-hand thread direction follows standard UNC practice. The zinc plating provides basic corrosion protection suitable for indoor and sheltered outdoor environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNylon insert locking style resists loosening under vibration without damaging mating threads\u003c\/li\u003e\n  \u003cli\u003e5\/16-18 UNC thread size with right-hand thread direction\u003c\/li\u003e\n  \u003cli\u003eGrade 2 steel construction with zinc-plated finish for basic corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eCompact profile: 17\/64 inches high, 1\/2 inch across flats\u003c\/li\u003e\n  \u003cli\u003eInch system of measurement, UNSPSC Code 31161716\u003c\/li\u003e\n  \u003cli\u003eDoes not meet military specifications — suitable for standard commercial use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with any standard 5\/16-18 UNC threaded bolt or stud in general mechanical and light structural assembly applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed with a standard wrench or nut driver sized for a 1\/2-inch across-flats hex fastener. Always power down or de-energize equipment before working on fastened assemblies in electrical or mechanical enclosures. The nylon insert is a single-use locking feature — reuse of the nut after full removal is not recommended as the insert may lose clamping effectiveness. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the specific assembly.\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\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking Style\u003c\/strong\u003e: Nylon Insert\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 17\/64 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.008 pounds\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 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Nylon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish Coating\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: UNC\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: 31161716\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: R50000021\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51696367567154,"sku":"R50000021","price":1856.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/806068b867909f0a13a11c4b73c504f5.jpg?v=1788341956","url":"https:\/\/voomisupply.com\/products\/value-collection-r50000021-hex-lock-nut-5-16-18","provider":"Voomi Supply","version":"1.0","type":"link"}