{"product_id":"jergens-215-066522-thread-locking-insert-unf-stainless-steel","title":"Jergens 215-066522 Thread Locking Insert Unf Stainless Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe JERGENS 215-066522 is a thin wall keylocking thread locking insert designed to install a permanent, load-bearing internal thread into a parent material. It accepts a 1\/4-28 UNF internal thread and uses a 3\/8-16 UNF external thread to anchor into the host part. Overall length is 0.37 inches. Constructed from 303 stainless steel with a passivated finish, this insert resists corrosion and meets NAS 1394 standards. Machinists, aerospace assemblers, and precision fabricators use keylocking inserts to create secure thread repairs or original installations in metal assemblies where thread pullout resistance is critical.\u003c\/p\u003e\n\u003cp\u003eThis insert is suited for applications requiring a reliable thin wall thread reinforcement in close-tolerance bores. The thin wall profile allows installation where bore spacing is tight and a standard-diameter insert would not fit. It is commonly used in aerospace, defense, and industrial equipment manufacturing. The 303 stainless steel construction makes it appropriate for environments requiring corrosion resistance without additional coating beyond passivation.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-28 UNF internal thread with Class 2B fit for precise engagement\u003c\/li\u003e\n  \u003cli\u003e3\/8-16 UNF external thread with Class 2A fit anchors insert into parent material\u003c\/li\u003e\n  \u003cli\u003eThin wall keylocking design enables installation in tight bore spacing\u003c\/li\u003e\n  \u003cli\u003e303 stainless steel construction with passivated finish for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eMeets NAS 1394 standard\u003c\/li\u003e\n  \u003cli\u003e0.37 inch overall length for compact thread reinforcement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style thread reinforcement insert for metal assemblies requiring a 1\/4-28 UNF internal thread installed via a 3\/8-16 UNF external thread interface, conforming to NAS 1394.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or precision assemblers using a keylocking insert driver tool after the parent material has been tapped to the correct 3\/8-16 UNF specification. Keys are driven flush with the parent material surface after the insert is seated to lock it against rotation. Ensure the parent bore is clean and dimensionally correct before installation. Follow the fastener manufacturer and applicable engineering specifications for hole preparation and key driving procedure.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Thread Size\u003c\/strong\u003e: 1\/4-28 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Thread Size\u003c\/strong\u003e: 3\/8-16 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Thread Class of Fit\u003c\/strong\u003e: 2B\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternal Thread Class of Fit\u003c\/strong\u003e: 2A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Type\u003c\/strong\u003e: Thin Wall Keylocking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 0.37 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 303\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Passivated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePassivated\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: NAS 1394\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: JERGENS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 215-066522\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JERGENS","offers":[{"title":"Default Title","offer_id":52020192543026,"sku":"215-066522","price":16.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/08bde30c45f6e56a273ebf39e3b9d220.jpg?v=1790011550","url":"https:\/\/voomisupply.com\/products\/jergens-215-066522-thread-locking-insert-unf-stainless-steel","provider":"Voomi Supply","version":"1.0","type":"link"}