{"product_id":"spi-21-239-9-chisel-contact-point-dial-indicator","title":"Spi 21-239-9 Chisel Contact Point Dial Indicator","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 21-239-9 is a chisel-style contact point designed for use with dial indicators in precision measurement applications. Threaded at 4-48 to match AGD Group 1 dial indicator spindle standards, this contact point measures 0.625 inches in overall length and features a 60-degree point angle ground from black oxide steel. The chisel tip geometry makes it well suited for measuring in grooves, slots, and other features where a standard ball-tip contact point cannot make reliable contact. Metrology technicians and machinists install this type of accessory when a specific tip geometry is required for the workpiece being measured.\u003c\/p\u003e\n\u003cp\u003eThis contact point fits dial indicators that accept standard 4-48 threaded contact points, including those classified under AGD Group 1. It is commonly used in tool rooms, machine shops, quality control environments, and on the production floor wherever a dial indicator is mounted on a surface plate, magnetic base, or fixture. The chisel configuration is a practical choice for applications involving scribed lines, narrow slots, or angular surface checks.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eChisel contact point style for groove, slot, and angular surface measurement\u003c\/li\u003e\n  \u003cli\u003e4-48 thread size compatible with AGD Group 1 dial indicator spindles\u003c\/li\u003e\n  \u003cli\u003e0.625 inch (5\/8 inch) contact point length\u003c\/li\u003e\n  \u003cli\u003e60-degree point angle for precise edge and slot contact\u003c\/li\u003e\n  \u003cli\u003eBlack oxide steel construction for durability and corrosion resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with dial indicators that accept 4-48 threaded contact points, conforming to AGD Group 1 industry designation standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a metrology technician or machinist. Before swapping contact points, remove the indicator from any active fixture or clamp to prevent dropping or damaging the instrument. Thread the 4-48 contact point in by hand until snug, taking care not to cross-thread or over-torque the small-diameter thread. Verify the indicator reads zero correctly after installing the new contact point and before taking measurements.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Style\u003c\/strong\u003e: Chisel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Material\u003c\/strong\u003e: Black Oxide Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.625 inches (5\/8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Angle\u003c\/strong\u003e: 60 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Designation\u003c\/strong\u003e: AGD Group 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFor Use With\u003c\/strong\u003e: Dial Indicators\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: 21-239-9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51702490661170,"sku":"21-239-9","price":36.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cec7b5282cd861f5a44bcfc291029359.jpg?v=1788411418","url":"https:\/\/voomisupply.com\/products\/spi-21-239-9-chisel-contact-point-dial-indicator","provider":"Voomi Supply","version":"1.0","type":"link"}