{"product_id":"spi-21-283-7-radius-contact-point-dial-indicator","title":"Spi 21-283-7 Radius Contact Point Dial Indicator","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 21-283-7 is a radius-style contact point designed for use with dial indicators in precision measurement applications. Machined from steel, this contact point features a 4-48 thread size and a contact point length of 0.0313 inches, with an overall length of 0.3125 inches (5\/16 inches). The radius tip geometry provides consistent, repeatable surface contact on curved or irregular workpiece surfaces, making it a reliable choice for metrology setups on the shop floor or in inspection environments. Installation and replacement are straightforward tasks performed by machinists, quality technicians, and tool and die professionals.\u003c\/p\u003e\u003cp\u003eThis contact point is suited for use in precision measurement tasks where a standard flat or ball-type point would yield inconsistent readings. The 4-48 thread is the industry-standard thread for AGD Group 1 dial indicators, making this a direct-fit replacement for worn or damaged contact points in most AGD-compliant indicators. It is appropriate for both surface plate inspection work and in-process gauging in machining and manufacturing environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRadius contact point style for consistent contact on curved surfaces\u003c\/li\u003e\n\u003cli\u003eSteel construction for durability and wear 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 0.0313 inches for compact tip geometry\u003c\/li\u003e\n\u003cli\u003eOverall length of 0.3125 inches (5\/16 inches) for standard indicator reach\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with dial indicators conforming to AGD Group 1 standards with a 4-48 thread contact point mount.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eContact point replacement on dial indicators requires no special tools beyond the contact point wrench appropriate for the indicator model. Power down or remove any electronic indicator from its measurement circuit before servicing. Do not overtighten the contact point, as this may damage the indicator spindle thread. Confirm thread engagement is secure before returning the indicator to service.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Point Style\u003c\/strong\u003e: Radius\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 1\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.0313 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 0.3125 inches (5\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Material\u003c\/strong\u003e: Steel\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\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 21-283-7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51691618206002,"sku":"21-283-7","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/eb79419b27a11f83600e6cda31649786.jpg?v=1788287843","url":"https:\/\/voomisupply.com\/products\/spi-21-283-7-radius-contact-point-dial-indicator","provider":"Voomi Supply","version":"1.0","type":"link"}