{"product_id":"starrett-50993-micrometer-calibration-standard-13-in","title":"Starrett 50993 Micrometer Calibration Standard 13 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 50993 is a spherical end micrometer calibration standard designed to verify and maintain the accuracy of outside micrometers used in precision measurement applications. At 13 inches in length, it accommodates the calibration of large-range micrometers with an accuracy of up to 0.00017 inches. The standard is factory calibrated and ships with a heat insulating handle, which prevents thermal expansion errors caused by hand contact during use. Dimensional calibration tools like this are relied upon by quality technicians, machinists, and metrologists to ensure measuring equipment stays within tolerance.\u003c\/p\u003e\n\u003cp\u003eThis calibration standard is suited for use in machine shops, manufacturing facilities, toolrooms, and quality control labs where micrometer accuracy must be periodically verified. The 13-inch length makes it appropriate for calibrating micrometers with extended measurement ranges. The included heat insulating handle is a practical feature for bench use, reducing the risk of measurement error introduced by body heat transfer to the reference bar during the calibration process.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSpherical end design for consistent, repeatable contact point engagement\u003c\/li\u003e\n  \u003cli\u003e13-inch length supports calibration of large-range outside micrometers\u003c\/li\u003e\n  \u003cli\u003eAccuracy up to 0.00017 inches for high-precision verification work\u003c\/li\u003e\n  \u003cli\u003eFactory calibrated — ready for immediate use as a reference standard\u003c\/li\u003e\n  \u003cli\u003eIncludes heat insulating handle to minimize thermal expansion errors during handling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with outside micrometers requiring a 13-inch calibration reference standard. Consult the micrometer manufacturer specifications to confirm range compatibility before use.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCalibration standards are handled and used by quality technicians or tool room personnel — not installed in a system. Store the standard in its case when not in use to protect the reference surfaces. Always allow the standard and the micrometer being checked to reach the same ambient temperature before taking reference measurements, and use the heat insulating handle during all checks to prevent thermal growth on the bar.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 13 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.00017 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCalibrated\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Spherical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes Heat Insulating Handle\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.688 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: STARRETT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 50993\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542716907826,"sku":"50993","price":129.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/227d9254d8a93455c38dbc1edf338d28.jpg?v=1785905258","url":"https:\/\/voomisupply.com\/products\/starrett-50993-micrometer-calibration-standard-13-in","provider":"Voomi Supply","version":"1.0","type":"link"}