{"product_id":"spi-20-637-5-drop-indicator-contact-point-extension","title":"Spi 20-637-5 Drop Indicator Contact Point Extension","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 20-637-5 is a 0.5-inch drop indicator contact point extension designed to increase the reach of dial indicator contact points. It threads directly onto compatible dial and test indicators using a standard 4-48 thread, providing added depth access for measurements in recessed bores, grooves, and hard-to-reach surfaces. Made from steel, this extension offers the rigidity and wear resistance required for repeatable precision measurement work. It is a single-piece accessory used by machinists, metrologists, and quality control technicians in shop and inspection environments.\u003c\/p\u003e\n\u003cp\u003eThis contact point extension suits applications where the standard stylus length on a dial or test indicator is insufficient to reach the measurement surface. Common uses include bore gauging, part runout checks, surface plate layout, and machine tool setup. The 4-48 threaded connection is an industry-standard thread size for dial indicator accessories, making it compatible with a wide range of test and dial indicator bodies used in general machining and inspection work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSteel construction provides rigidity and resistance to wear during repeated contact\u003c\/li\u003e\n  \u003cli\u003e4-48 thread is the industry-standard connection for dial and test indicator contact points\u003c\/li\u003e\n  \u003cli\u003e0.5-inch extension length adds reach for measurements in recessed or deep features\u003c\/li\u003e\n  \u003cli\u003eCompact single-piece design with no moving parts to affect measurement accuracy\u003c\/li\u003e\n  \u003cli\u003eSold individually for targeted replacement or single-application use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with any dial or test indicator that accepts 4-48 threaded contact point accessories. Specific model compatibility depends on the indicator brand and thread specification — verify the thread standard on your indicator before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by hand-threading the extension into the indicator contact point port until snug. Avoid overtightening, as the 4-48 thread is fine-pitched and can be damaged by excessive torque. Ensure the indicator is removed from active measurement setup before swapping contact point extensions to avoid zero-shift errors. No special tools are required for installation.\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: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: 20-637-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51698522685746,"sku":"20-637-5","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b6bf736bbeb64c9a1f788cd4b67c51b9.jpg?v=1788364184","url":"https:\/\/voomisupply.com\/products\/spi-20-637-5-drop-indicator-contact-point-extension","provider":"Voomi Supply","version":"1.0","type":"link"}