{"product_id":"spi-20-642-5-drop-indicator-contact-point-extension","title":"Spi 20-642-5 Drop Indicator Contact Point Extension","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 20-642-5 is a steel contact point extension designed for use with drop indicators and dial indicators. It extends the reach of a standard contact point to allow measurement in recessed bores, deep cavities, and hard-to-reach features on a workpiece. The extension measures 1-3\/4 inches in length and threads on using a 4-48 thread, the standard thread size found on most dial indicator contact point stems. Machinists, tool-and-die technicians, and metrology professionals keep these extensions on hand for setups where the standard contact point cannot reach the measurement surface without interference.\u003c\/p\u003e\n\u003cp\u003eThis extension is suited for precision measurement applications in machine shops, tool rooms, and quality control environments. It threads directly onto the contact point stem of a dial indicator, adding 1-3\/4 inches of reach without requiring a separate adapter. Steel construction provides the durability and dimensional stability needed for repeatable measurements. The 4-48 thread is a universal fit across the broad majority of dial indicators used in trade and manufacturing settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSteel construction for durability and dimensional stability in precision measurement work\u003c\/li\u003e\n  \u003cli\u003e1-3\/4 inch extension length for added reach into recessed features and deep bores\u003c\/li\u003e\n  \u003cli\u003e4-48 thread size matches the standard contact point stem thread on most dial indicators\u003c\/li\u003e\n  \u003cli\u003eCompatible with drop indicators and standard dial indicators\u003c\/li\u003e\n  \u003cli\u003eCompact form factor minimizes deflection during measurement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 4-48 threaded contact point extension compatible with any test indicator or dial indicator accepting a 4-48 contact point stem thread.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires no special tools. Thread the extension onto the contact point stem by hand, ensuring full thread engagement without overtightening, which can damage the fine 4-48 thread. Remove the existing contact point before attaching the extension, then reattach the contact point to the free end of the extension. Verify indicator zero and re-calibrate the setup before taking measurements, as adding an extension changes the effective contact height.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtension Length\u003c\/strong\u003e: 1-3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Width\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Height\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.15 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: SPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 20-642-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51697585946930,"sku":"20-642-5","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/aa0303bf0d50fab0012cb20879b61470.jpg?v=1788353097","url":"https:\/\/voomisupply.com\/products\/spi-20-642-5-drop-indicator-contact-point-extension","provider":"Voomi Supply","version":"1.0","type":"link"}