{"product_id":"spi-21-259-7-flat-button-contact-point-dial-indicator","title":"Spi 21-259-7 Flat Button Contact Point Dial Indicator","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 21-259-7 is a flat button contact point designed for use with dial indicators in precision measurement applications. Machined from black oxide steel, this contact point threads directly onto compatible dial indicators using a 4-48 thread, providing a stable, low-profile sensing surface for accurate linear measurement readings. The flat button geometry distributes contact pressure evenly across a 1.5-inch diameter face, making it well-suited for workpieces with broad, flat surfaces. At 0.25 inches in contact point length, it fits within the AGD Group 1 standard used widely in machining, inspection, and metrology environments. Machinists, quality control technicians, and tool-and-die professionals are the typical end users.\u003c\/p\u003e\n\u003cp\u003eThis contact point is intended for installation on dial indicators in shop-floor measurement setups, inspection stations, and fixture-based gauging applications. It is suited for both manual hand-gauging and indicator-in-fixture configurations. Wherever a flat, broad contact surface is needed to measure soft materials, large flat surfaces, or to reduce point-contact marking on finished parts, the flat button style is the appropriate choice over a standard ball-end or pointed tip.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFlat button contact style distributes load evenly across a 1.5-inch diameter face\u003c\/li\u003e\n  \u003cli\u003eBlack oxide steel construction provides hardness and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003e4-48 thread fits AGD Group 1 dial indicators\u003c\/li\u003e\n  \u003cli\u003e0.25-inch contact point length for compact, low-profile fitment\u003c\/li\u003e\n  \u003cli\u003eMeets AGD Group 1 industry designation for standardized interchangeability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with dial indicators accepting a 4-48 threaded contact point, conforming to AGD Group 1 specifications. Specific dial indicator model compatibility should be confirmed against the indicator manufacturer's thread and contact point specification before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eContact points should be installed and removed by hand or with an appropriate spanner wrench to avoid cross-threading or over-torquing the 4-48 thread. Ensure the dial indicator stem is clean and free of debris before threading on the contact point. Always zero the indicator after swapping contact points, as point geometry changes affect the reference datum. This work is typically performed by machinists or metrology technicians without specialized tooling beyond a clean work surface and calibrated reference gauge.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 1.5 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\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\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: 21-259-7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51717575475506,"sku":"21-259-7","price":20.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6401dc7e8a9558635cbc26d2fd6e99a3.jpg?v=1788542751","url":"https:\/\/voomisupply.com\/products\/spi-21-259-7-flat-button-contact-point-dial-indicator","provider":"Voomi Supply","version":"1.0","type":"link"}