{"product_id":"spi-20-976-7-ball-needle-contact-point-dial-indicator","title":"Spi 20-976-7 Ball Needle Contact Point Dial Indicator","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 20-976-7 is a ball needle contact point designed for use with dial indicators in precision measurement applications. It features a chrome alloy steel ball tip measuring 0.125 inches in diameter, attached to a contact point shaft with a total length of 0.75 inches. The threaded end uses a 4-48 thread standard, conforming to AGD Group 1 industry designation. Machinists, tool-and-die technicians, and quality control inspectors use this contact point when measuring surfaces that require a small, well-defined contact area. The ball needle style is well suited for detecting surface variations in bores, slots, and contoured workpieces.\u003c\/p\u003e\n\u003cp\u003eThis contact point is intended for installation on dial indicators in manufacturing, machine shop, and inspection environments. It is appropriate for both bench-top and in-machine measurement setups where AGD Group 1 accessories are specified. Applications include surface runout checks, bore alignment, and feature-to-feature measurement where a small ball contact minimizes deflection error and improves repeatability on curved or angled surfaces.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBall needle tip style for precise contact on curved and contoured surfaces\u003c\/li\u003e\n  \u003cli\u003eChrome alloy steel construction for wear resistance and dimensional stability\u003c\/li\u003e\n  \u003cli\u003e0.125 inch ball diameter for small-contact, high-accuracy measurement\u003c\/li\u003e\n  \u003cli\u003e0.75 inch contact point length for standard reach applications\u003c\/li\u003e\n  \u003cli\u003e4-48 thread fits AGD Group 1 dial indicators\u003c\/li\u003e\n  \u003cli\u003eLightweight at 0.1 pounds, minimizing added mass on sensitive indicator stems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with dial indicators accepting 4-48 threaded contact points meeting AGD Group 1 specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by threading the contact point into the indicator stem by hand until snug. Use the appropriate small wrench or contact point tool if the indicator manufacturer specifies a torque method, but avoid over-tightening, which can damage the 4-48 thread. Remove the existing contact point before installation and verify the replacement thread specification matches the indicator stem. Handle chrome alloy steel contact points carefully to avoid nicking the ball tip, which would introduce measurement error.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Style\u003c\/strong\u003e: Ball Needle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Material\u003c\/strong\u003e: Chrome Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBall Diameter\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48\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: 20-976-7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51696585605426,"sku":"20-976-7","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/34db935deb9f44e03576a52f688826f4.jpg?v=1788344247","url":"https:\/\/voomisupply.com\/products\/spi-20-976-7-ball-needle-contact-point-dial-indicator","provider":"Voomi Supply","version":"1.0","type":"link"}