{"product_id":"seco-00018920-differential-screw-1-4-28-thread-turning","title":"Seco 00018920 Differential Screw 1\/4-28 Thread Turning","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SECO 00018920 is a differential screw designed for indexable turning toolholders. Differential screws use opposing thread directions on a single fastener to produce precise, low-profile clamping force when securing indexable inserts. This screw features a 1\/4-28 thread size, a right-hand thread length of 0.37 inches, a left-hand thread length of 0.37 inches, and an overall length of 1.00 inch. It is compatible with the CL-20 clamp style. Machinists, toolroom technicians, and CNC setup personnel install this type of fastener during insert changes and toolholder maintenance on turning centers and manual lathes.\u003c\/p\u003e\n\u003cp\u003eThis differential screw is intended for use in indexable turning applications where a CL-20 clamp secures the cutting insert to the toolholder body. It is sold individually per package with a minimum order quantity of 10 pieces. The screw corresponds to industry standard number 18920 and is a direct replacement or service fastener for toolholders requiring this specification. It is suited to production turning environments where insert indexing is performed at regular intervals.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-28 thread size for positive engagement with CL-20 clamp-style toolholders\u003c\/li\u003e\n  \u003cli\u003eDual opposing thread design — right-hand and left-hand — generates controlled clamping force with minimal torque input\u003c\/li\u003e\n  \u003cli\u003eRight-hand thread length of 0.37 inches and left-hand thread length of 0.37 inches\u003c\/li\u003e\n  \u003cli\u003eOverall length of 1.00 inch suits standard indexable turning toolholder pocket depths\u003c\/li\u003e\n  \u003cli\u003eCompatible with CL-20 clamp hardware for indexable turning inserts\u003c\/li\u003e\n  \u003cli\u003eCorresponds to industry standard number 18920 for cross-reference and procurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with CL-20 clamp-style indexable turning toolholders requiring a 1\/4-28 thread differential screw. Compatible hardware type is the CL-20 clamp as stated in product specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or toolroom technicians during routine insert indexing or toolholder service. Ensure the toolholder is removed from the machine or the machine is in a safe, de-energized state before handling cutting inserts or fasteners. Use the correct hex key or Torx driver as specified by the toolholder manufacturer — do not substitute driver sizes, as differential screws are prone to head damage when driven with ill-fitting tools. Inspect the screw threads and clamp seat for chips or debris before reinstalling to ensure proper seating of the indexable insert.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 1.00 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRight-Hand Thread Length\u003c\/strong\u003e: 0.37 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLeft-Hand Thread Length\u003c\/strong\u003e: 0.37 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eScrew Type\u003c\/strong\u003e: Differential\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClamp Compatibility\u003c\/strong\u003e: CL-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndexable Tool Type\u003c\/strong\u003e: Turning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Standard Number\u003c\/strong\u003e: 18920\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161500\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Order Quantity\u003c\/strong\u003e: 10\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: SECO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 00018920\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51561042116914,"sku":"00018920","price":95.64,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5ec03f0c7f692faeb7f8dfb7cd23c515.jpg?v=1786462015","url":"https:\/\/voomisupply.com\/products\/seco-00018920-differential-screw-1-4-28-thread-turning","provider":"Voomi Supply","version":"1.0","type":"link"}