{"product_id":"gibraltar-74213216-round-knurled-check-nut-1-2-13-unc","title":"Gibraltar 74213216 Round Knurled Check Nut 1\/2-13 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GIBRALTAR 74213216 is a round knurled check nut machined from steel with a black oxide finish. Check nuts are used as locking elements threaded against a primary nut to prevent loosening under vibration or dynamic loads. This nut features a 1\/2-13 UNC thread standard, a knurled round head for positive grip, and a black oxide coating that provides mild corrosion resistance and a clean appearance. At 0.05 pounds, it is a compact fastener suited for light-duty locking applications in mechanical assemblies. Machinists, maintenance technicians, and mechanical contractors install this type of hardware during assembly or repair work on equipment, jigs, fixtures, and threaded rod assemblies.\u003c\/p\u003e\u003cp\u003eThis check nut is appropriate for use in industrial, commercial, and light mechanical applications where a secondary locking nut is required on a 1\/2-13 UNC threaded fastener. The round knurled head profile allows hand-tightening in accessible locations, while the black oxide steel construction holds up in dry or lightly oiled environments. It is commonly used in fabrication shops, maintenance settings, and general mechanical assembly scenarios where vibration resistance and thread security are priorities.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/2-13 UNC thread for compatibility with standard inch-series threaded assemblies\u003c\/li\u003e\n\u003cli\u003eRound knurled head profile enables hand grip for tightening without a wrench in accessible positions\u003c\/li\u003e\n\u003cli\u003eBlack oxide finish provides mild corrosion resistance and reduces surface glare\u003c\/li\u003e\n\u003cli\u003eSteel construction offers durability in typical industrial and mechanical environments\u003c\/li\u003e\n\u003cli\u003eCompact 7\/16-inch overall height minimizes stack-up in tight assemblies\u003c\/li\u003e\n\u003cli\u003e1-1\/4-inch head diameter and 1-inch base diameter for positive bearing surface\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard check nut for use with 1\/2-13 UNC threaded fasteners in mechanical assemblies, fixtures, and equipment requiring a secondary thread-locking element.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation of check nuts is typically performed by machinists or maintenance technicians using standard open-end or box wrenches. Thread the check nut onto the fastener and tighten it firmly against the primary nut to create a locking interface. Always de-energize or lock out equipment before working on threaded mechanical assemblies in powered machinery. Verify thread engagement and ensure mating threads are free of debris or damage before installation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNut Type\u003c\/strong\u003e: Check Nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Round Knurled\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: Black Oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Height\u003c\/strong\u003e: 7\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBase Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: GIBRALTAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 74213216\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GIBRALTAR","offers":[{"title":"Default Title","offer_id":51721810641202,"sku":"74213216","price":18.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f474a5d71f2c57b505f90cb66135a1d7.jpg?v=1788581263","url":"https:\/\/voomisupply.com\/products\/gibraltar-74213216-round-knurled-check-nut-1-2-13-unc","provider":"Voomi Supply","version":"1.0","type":"link"}