{"product_id":"spi-ms160712021-micrometer-calibration-standard-21-in","title":"Spi MS160712021 Micrometer Calibration Standard 21 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI MS160712021 is a spherical end micrometer calibration standard designed for verifying and calibrating outside micrometers in precision measurement applications. Measuring 21 inches in length and calibrated to an accuracy of 0.0002 inch, this standard provides a reliable reference for ensuring instrument accuracy in demanding shop and metrology environments. It includes a heat insulating handle, which prevents thermal expansion errors caused by hand contact during measurement. Calibration standards of this type are used by machinists, quality control technicians, and metrology professionals who need traceable reference standards for routine gauge verification.\u003c\/p\u003e\n\u003cp\u003eThis calibration standard is suited for use in machine shops, manufacturing facilities, and quality labs where outside micrometer accuracy must be maintained. The spherical contact ends allow consistent, repeatable seating against micrometer anvils across the full 21-inch range. The included heat insulating handle supports accurate readings by minimizing heat transfer from the user to the standard during handling. It ships as a single unit and is appropriate for both shop-floor calibration checks and formal gauge R and R procedures.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e21-inch length covers large outside micrometer ranges\u003c\/li\u003e\n  \u003cli\u003eAccuracy up to 0.0002 inch for precise calibration reference\u003c\/li\u003e\n  \u003cli\u003eSpherical end geometry ensures repeatable anvil contact\u003c\/li\u003e\n  \u003cli\u003eCalibrated at the factory for immediate use out of the box\u003c\/li\u003e\n  \u003cli\u003eHeat insulating handle reduces thermal expansion error during use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with outside micrometers as a calibration and verification reference standard. Compatible with micrometers requiring a 21-inch calibration standard.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCalibration standards are handled by metrology technicians or qualified QC personnel, not installed in a traditional sense. Store the standard in its case when not in use to protect the contact surfaces. Always allow the standard to reach ambient temperature before use to avoid thermal measurement error. Handle by the insulating grip only to maintain measurement integrity.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Length\u003c\/strong\u003e: 21 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0002 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Shape\u003c\/strong\u003e: Spherical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCalibrated\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat Insulating Handle\u003c\/strong\u003e: Included\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFor Use With\u003c\/strong\u003e: Micrometers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.5 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: MS160712021\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51717215322418,"sku":"MS160712021","price":115.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fbe94bee843970ded0b57cf624093cdf.jpg?v=1788536997","url":"https:\/\/voomisupply.com\/products\/spi-ms160712021-micrometer-calibration-standard-21-in","provider":"Voomi Supply","version":"1.0","type":"link"}