{"product_id":"spi-21-377-7-horizontal-dial-test-indicator-0-0005-in","title":"Spi 21-377-7 Horizontal Dial Test Indicator 0.0005 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 21-377-7 is a horizontal dial test indicator designed for precision measurement in machining, inspection, and quality control applications. It covers a range of 0 to 0.02 inches with a graduation of 0.0005 inches and a matching accuracy of 0.0005 inches, making it appropriate for close-tolerance work. The 1.25-inch white dial reads 0-10-0, allowing the technician to read deflection in both directions from center. Movement is fully jeweled for durability and smooth operation, and the body carries a satin chrome finish. A NIST traceability certificate is included, supporting use in documented inspection environments.\u003c\/p\u003e\u003cp\u003eThis indicator suits horizontal gauging setups where a standard plunger-style indicator cannot reach or would interfere with adjacent surfaces. It is commonly used on surface plates, height gages, and CMM fixtures in tool rooms, job shops, and production inspection departments. The dovetail mount accepts standard dovetail extensions, giving the technician flexibility in reach and positioning. The universal clamp and included accessories allow quick setup across a range of fixturing arrangements.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0 to 0.02 inch measurement range with 0-10-0 bidirectional dial reading\u003c\/li\u003e\n\u003cli\u003e0.0005 inch graduation and 0.0005 inch accuracy for close-tolerance inspection\u003c\/li\u003e\n\u003cli\u003eFully jeweled movement for consistent feel and long service life\u003c\/li\u003e\n\u003cli\u003eDovetail mount with included 5\/32 inch and 3\/8 inch dovetail extensions\u003c\/li\u003e\n\u003cli\u003e1.25-inch white dial with satin chrome finish for clear readability\u003c\/li\u003e\n\u003cli\u003eNIST traceability certificate included for documented quality control use\u003c\/li\u003e\n\u003cli\u003eKit includes two contact points, height gage bar, universal clamp, and fitted case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with standard dovetail-style indicator holders, arms, and fixtures. The included 5\/32 inch and 3\/8 inch dovetail extensions allow mounting to most common surface gage arms, height gages, and inspection fixtures that accept dovetail-style horizontal indicators.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eHorizontal dial test indicators are installed by metrologists, machinists, and quality control technicians using standard indicator holders or magnetic base arms. Secure the dovetail shank firmly before taking measurements to prevent movement errors. Handle the contact point and jeweled movement with care — avoid side-loading or dropping the indicator, as impact can damage the movement. Zero the dial against a known reference surface before use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 0 to 0.02 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Reading\u003c\/strong\u003e: 0-10-0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Diameter\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Color\u003c\/strong\u003e: White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicator Style\u003c\/strong\u003e: Horizontal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Type\u003c\/strong\u003e: Jeweled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Dovetail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.64 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Diameter\u003c\/strong\u003e: 0.079 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange Per Revolution\u003c\/strong\u003e: 0.02 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 4.34 inches L x 2.45 inches W x 1.38 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrated\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraceability Certification\u003c\/strong\u003e: NIST\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContents\u003c\/strong\u003e: Two contact points, 5\/32 inch and 3\/8 inch dovetail extensions, fitted case, height gage bar, indicator, short form certificate of calibration, universal clamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 41111630\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: 21-377-7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51694774518066,"sku":"21-377-7","price":110.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2665e214bfb121fd477f4ecbd9d5577b.jpg?v=1788328287","url":"https:\/\/voomisupply.com\/products\/spi-21-377-7-horizontal-dial-test-indicator-0-0005-in","provider":"Voomi Supply","version":"1.0","type":"link"}