{"product_id":"spi-21-258-9-flat-button-contact-point-dial-indicator","title":"Spi 21-258-9 Flat Button Contact Point Dial Indicator","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 21-258-9 is a flat button contact point designed for use with dial indicators in precision measurement applications. Manufactured from black oxide steel, this contact point features a 4-48 thread for secure attachment and a 1\/8-inch contact length with a 1-inch diameter face. The flat button profile distributes contact force evenly across a surface, making it well suited for gauging flat, smooth workpieces. It conforms to AGD Group 1 industry standards, ensuring compatibility with a wide range of standard dial indicator stems. Machinists, quality control technicians, and tool room personnel are the primary users of this accessory.\u003c\/p\u003e\u003cp\u003eThis contact point is a drop-in accessory for dial indicators used in machine shop, inspection room, and manufacturing floor environments. It is appropriate for checking flatness, runout, and surface variation on machined parts. The flat button style is preferred when measuring soft materials or finished surfaces where a pointed or ball contact could mar the workpiece. Compatible with AGD Group 1 dial indicators that accept a 4-48 threaded contact point.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFlat button contact style distributes load evenly for accurate surface measurement\u003c\/li\u003e\n\u003cli\u003eBlack oxide steel construction for durability and corrosion resistance\u003c\/li\u003e\n\u003cli\u003e4-48 thread size for standard AGD Group 1 dial indicator compatibility\u003c\/li\u003e\n\u003cli\u003e1-inch contact face diameter suits wide-area surface gauging\u003c\/li\u003e\n\u003cli\u003e1\/8-inch contact point length for low-profile installation\u003c\/li\u003e\n\u003cli\u003eMeets AGD Group 1 industry designation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with dial indicators accepting a 4-48 threaded contact point, conforming to AGD Group 1 industry standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by threading the contact point onto the dial indicator stem by hand until snug. Avoid overtightening, as the fine 4-48 thread can be damaged by excessive torque. Power down or de-energize any automated gauging fixture before servicing the indicator or swapping contact points. No special tools are required beyond a suitable wrench or spanner if the stem fitting is recessed.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Point Style\u003c\/strong\u003e: Flat Button\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: 1\/8 inch (0.125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Face Diameter\u003c\/strong\u003e: 1 inch (1.0000 inches)\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\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 21-258-9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51720639840562,"sku":"21-258-9","price":17.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/cf8e41c65d1a4a1a0b6dc7b9ae916b8e.jpg?v=1788567258","url":"https:\/\/voomisupply.com\/products\/spi-21-258-9-flat-button-contact-point-dial-indicator","provider":"Voomi Supply","version":"1.0","type":"link"}