{"product_id":"e-z-lok-329-004-thread-locking-insert-4-40-x-10-32-unc","title":"E-z Lok 329-004 Thread Locking Insert 4-40 X 10-32 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe E-Z LOK 329-004 is a self-locking threaded insert designed to create a secure 4-40 internal thread in a 10-32 tapped hole. Machined from C12L14 carbon steel with a smooth, rolled finish, this insert measures 0.25 inches in overall length and meets UNC thread standards. It is classified with a 2B internal thread fit and a 2A external thread fit, which provides controlled engagement and reliable resistance to loosening under vibration or cyclic load. The 329-004 is installed by licensed machinists, assembly technicians, and maintenance professionals working with metal substrates where thread repair or thread size conversion is required.\u003c\/p\u003e\u003cp\u003eThis insert is suited for applications in light manufacturing, maintenance and repair operations, and precision assembly where a 4-40 internal thread must be introduced into a 10-32 parent thread. The self-lock wall design eliminates the need for adhesives or secondary locking hardware in most standard fastening scenarios. Typical installation substrates include steel and aluminum components found in industrial equipment, electronic enclosures, and mechanical assemblies. A standard tap compatible with a 10-32 thread is required to prepare the host material before installation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-40 internal thread provides a smaller-diameter fastener interface in a 10-32 tapped hole\u003c\/li\u003e\n\u003cli\u003eSelf-lock wall design resists rotation and loosening without adhesives\u003c\/li\u003e\n\u003cli\u003eC12L14 carbon steel construction for strength and machinability\u003c\/li\u003e\n\u003cli\u003e0.25 inches overall length suits thin-section and compact assemblies\u003c\/li\u003e\n\u003cli\u003eUNC thread standard with 2B internal and 2A external class of fit for controlled engagement\u003c\/li\u003e\n\u003cli\u003eSmooth, rolled finish on external threads for consistent installation torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for installation into a standard 10-32 UNC tapped hole using a standard tap. Compatible with host materials that can accept a 10-32 external thread engagement.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by machinists or assembly technicians using standard hand or power tools. The host material must be tapped to 10-32 UNC specification before the insert is driven or pressed into place. Ensure the workpiece is fully secured and depowered if the assembly is part of an active system before beginning thread repair or conversion work. Do not exceed the designed class-of-fit engagement by forcing the insert into an undersized or damaged thread.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Thread Size\u003c\/strong\u003e: 4-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Thread Size\u003c\/strong\u003e: 10-32\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Length\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Carbon Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: C12L14\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: Self-Lock Wall\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating \/ Finish\u003c\/strong\u003e: Smooth, Rolled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Tap Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0009 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: E-Z LOK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 329-004\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"E-Z LOK","offers":[{"title":"Default Title","offer_id":67910934823218,"sku":"329-004","price":34.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ac1d65c3dd4314dd60a6fc17b5a46450.jpg?v=1791201770","url":"https:\/\/voomisupply.com\/products\/e-z-lok-329-004-thread-locking-insert-4-40-x-10-32-unc","provider":"Voomi Supply","version":"1.0","type":"link"}