{"product_id":"spi-31-481-5-inside-outside-diameter-caliper-attachment","title":"Spi 31-481-5 Inside Outside Diameter Caliper Attachment","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 31-481-5 is a two-piece inside and outside diameter attachment set designed to extend the measuring capability of standard 6-inch dial or electronic calipers. The attachment mounts to the caliper jaw and enables measurement of internal and external diameters on threaded features, grooves, and bores that standard jaws cannot reach directly. Chrome finish provides corrosion resistance and durability under shop conditions. Compatible pitch range spans 1.5 to 2.5mm, covering a broad range of metric thread and bore measurement tasks. Instructions are included in the package.\u003c\/p\u003e\u003cp\u003eThis attachment set is suited for machine shops, tool rooms, and maintenance environments where technicians need to measure internal or external diameters beyond the reach of standard caliper jaws. It pairs with 6-inch dial calipers or 6-inch electronic digital calipers. The two-piece construction allows both inside and outside diameter measurement without swapping tools, making it practical for inspection and quality control work on threaded fasteners, bores, and cylindrical features.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMeasures both inside and outside diameters with a single attachment set\u003c\/li\u003e\n\u003cli\u003eCompatible with 6-inch dial and 6-inch electronic calipers\u003c\/li\u003e\n\u003cli\u003ePitch range: 1.5 to 2.5mm\u003c\/li\u003e\n\u003cli\u003eChrome finish for corrosion resistance in shop environments\u003c\/li\u003e\n\u003cli\u003eIncludes printed instructions for setup and use\u003c\/li\u003e\n\u003cli\u003eCompact two-piece kit weighing 0.05 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with 6-inch dial or electronic calipers as stated by the manufacturer.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation of this attachment is performed by machinists or metrology technicians and requires no special tools beyond the caliper itself. Follow the included instructions for proper jaw alignment and attachment seating before taking measurements. Verify the caliper is zeroed after attaching the accessory and before recording readings. Do not force the attachment onto caliper jaws — confirm jaw style compatibility before use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessory Type\u003c\/strong\u003e: Inside and Outside Diameter Attachment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Pieces\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Pitch\u003c\/strong\u003e: 1.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Pitch\u003c\/strong\u003e: 2.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Use With\u003c\/strong\u003e: 6-inch dial or electronic calipers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Chrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: Instructions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\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: 31-481-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51690367451442,"sku":"31-481-5","price":100.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9675ef4ae8777db23cc1ce2c9ea7f858.jpg?v=1788269510","url":"https:\/\/voomisupply.com\/products\/spi-31-481-5-inside-outside-diameter-caliper-attachment","provider":"Voomi Supply","version":"1.0","type":"link"}