{"product_id":"spi-21-231-6-drop-indicator-radius-contact-point-4-48","title":"Spi 21-231-6 Drop Indicator Radius Contact Point 4-48","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 21-231-6 is a drop indicator radius contact point designed for use with dial indicators in precision measurement applications. Machined from black oxide steel, this contact point features a 3\/16 inch diameter and a contact point length of 0.825 inches. It threads in at a 4-48 thread size and meets AGD Group 1 industry standards. The black oxide finish provides corrosion resistance and reduces light glare during use. Dimensional inspection technicians, machinists, and quality control professionals install and use this contact point as part of routine gauge setup and measurement work.\u003c\/p\u003e\n\u003cp\u003eThis contact point is suited for dimensional measurement tasks in machine shops, manufacturing facilities, and quality inspection environments. It fits dial indicators that accept standard AGD Group 1 accessory contact points with a 4-48 thread. Typical applications include surface runout checks, bore measurement setups, and part feature inspections where a radius-style tip is preferred over a flat or pointed contact for consistent surface contact.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eRadius contact point style for consistent surface contact during measurement\u003c\/li\u003e\n  \u003cli\u003eBlack oxide steel construction for durability and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e4-48 thread size compatible with AGD Group 1 dial indicators\u003c\/li\u003e\n  \u003cli\u003eContact point length of 0.825 inches for standard reach applications\u003c\/li\u003e\n  \u003cli\u003e3\/16 inch diameter contact point tip\u003c\/li\u003e\n  \u003cli\u003eMeets AGD Group 1 industry designation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with dial indicators that accept AGD Group 1 contact points with a 4-48 thread size.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or metrology technicians during dial indicator setup. Thread the contact point into the indicator spindle by hand first, then snug with appropriate tooling — do not overtighten, as this can damage the spindle threads or affect indicator accuracy. Verify the indicator reads zero correctly with the new contact point seated before taking measurements. Store contact points in a protected case to prevent tip damage when not in use.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Style\u003c\/strong\u003e: Radius\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Material\u003c\/strong\u003e: Black Oxide Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.825 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 3\/16 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Designation\u003c\/strong\u003e: AGD Group 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\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: 21-231-6\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51691147854130,"sku":"21-231-6","price":14.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/59be92d6b15f078a6e5e4983e7c08989.jpg?v=1788280816","url":"https:\/\/voomisupply.com\/products\/spi-21-231-6-drop-indicator-radius-contact-point-4-48","provider":"Voomi Supply","version":"1.0","type":"link"}