{"product_id":"value-collection-212617-left-hand-hex-jam-nut-1-2-20-unf","title":"Value Collection 212617 Left Hand Hex Jam Nut 1\/2-20 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 212617 is a left-hand thread hex jam nut designed for fastening applications where standard right-hand threads are not suitable. Machined from steel with a zinc clear finish, this nut measures 0.75 inches across the flats and 0.3125 inches in height. The 1\/2-20 UNF thread specification indicates a half-inch nominal diameter with 20 threads per inch on a Unified National Fine thread form. Jam nuts are used to lock a standard nut in place or to serve as a low-profile fastener where limited axial space is available. This part is sold in a package quantity of 50.\u003c\/p\u003e\n\u003cp\u003eLeft-hand hex jam nuts are used in mechanical assemblies where vibration or rotational direction would cause a right-hand nut to loosen. Common applications include rotating shafts, tensioning rods, and specialized mechanical linkages found in industrial, HVAC, and plumbing equipment. The zinc clear finish provides a basic level of corrosion resistance for general indoor or sheltered installations. Plumbers, pipefitters, HVAC technicians, and mechanical contractors working on equipment assemblies may encounter this fastener as a component-level hardware item.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLeft-hand UNF thread prevents loosening in counter-clockwise rotating or vibrating assemblies\u003c\/li\u003e\n  \u003cli\u003e1\/2-20 UNF thread form for precise, fine-pitch fastening\u003c\/li\u003e\n  \u003cli\u003e0.75 inches across flats for use with standard hex tooling\u003c\/li\u003e\n  \u003cli\u003eLow-profile jam nut height of 0.3125 inches suits tight axial clearances\u003c\/li\u003e\n  \u003cli\u003eZinc clear finish offers basic corrosion protection\u003c\/li\u003e\n  \u003cli\u003ePackaged in quantities of 50 for service stock or job-site use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with 1\/2-20 UNF left-hand threaded fastener assemblies. Verify thread direction and pitch before installation, as left-hand nuts are not interchangeable with standard right-hand hardware.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a standard hex wrench or open-end wrench sized for 0.75-inch across-flats hex fasteners. Left-hand threads tighten counter-clockwise, which is the reverse of standard practice  -  confirm thread direction before applying torque to avoid cross-threading or component damage. De-energize or depressurize any system before servicing mechanical fastener assemblies. Follow applicable mechanical and equipment codes for the system being serviced.\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 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF (Unified National Fine)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAcross Flats\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 0.3125 inches\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 Clear\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 50\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMilitary Specification\u003c\/strong\u003e: Does Not Meet Military Specifications\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: 212617\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":52015282061618,"sku":"212617","price":29.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8ef4402ab02967684d7c64b25473e5cf.jpg?v=1790007636","url":"https:\/\/voomisupply.com\/products\/value-collection-212617-left-hand-hex-jam-nut-1-2-20-unf","provider":"Voomi Supply","version":"1.0","type":"link"}