{"product_id":"starrett-687-countersink-gage-82-degree","title":"Starrett 687 Series Countersink Gage — 82°","description":"\u003cp\u003eThe Starrett 687 Series reads the large diameter of an 82° countersink directly, in .002\" increments. Unlike a chamfer gage, which seats on the top edge of the chamfer, a countersink gage seats on the angular face — so it measures the countersink the way the print specifies it and the way a fastener will actually sit in it.\u003c\/p\u003e\n\u003ch2\u003eWhy 82°\u003c\/h2\u003e\n\u003cp\u003e82° is the standard included angle for inch flat-head screws, which makes the 687 the countersink gage for most imperial fastener work. Starrett offers the same gage in \u003ca href=\"\/products\/starrett-688-countersink-gage-90-degree\"\u003e90°\u003c\/a\u003e and \u003ca href=\"\/products\/starrett-689-countersink-gage-100-degree\"\u003e100°\u003c\/a\u003e so the cone matches the countersink being inspected — the angle is not adjustable, and using the wrong angle gives a wrong diameter.\u003c\/p\u003e\n\u003ch2\u003eHow It Reads\u003c\/h2\u003e\n\u003cp\u003eA set master ring is furnished with each gage for calibration and setting. Press the button on top of the indicator to firmly depress the gage head into the countersink; when the gage is lifted out, the reading is held until the reset button is activated. That hold makes the gage practical one-handed at the machine, where reading the dial in position is often impossible.\u003c\/p\u003e\n\u003ch2\u003eChoosing a Range\u003c\/h2\u003e\n\u003cp\u003eFour inch-reading ranges cover .020-.170\", .160-.360\", .360-.560\" and .560-.780\". Select the range that brackets the countersink's large diameter.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eAerospace and sheet-metal flush-fastener inspection, riveted assembly qualification, machined countersink verification, incoming and in-process inspection.\u003c\/p\u003e","brand":"WESTport Corp.","offers":[{"title":".020-.170\"","offer_id":51285613248548,"sku":"687-1Z","price":0.01,"currency_code":"USD","in_stock":true},{"title":".160-.360\"","offer_id":51285613281316,"sku":"687-2Z","price":0.01,"currency_code":"USD","in_stock":true},{"title":".360-.560\"","offer_id":51285613314084,"sku":"687-3Z","price":0.01,"currency_code":"USD","in_stock":true},{"title":".560-.780\"","offer_id":51285613346852,"sku":"687-4Z","price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/STARRETT_687_COUNTERSINK_GAGE_82_Degrees.png?v=1787162935","url":"https:\/\/westportcorp.com\/products\/starrett-687-countersink-gage-82-degree","provider":"WESTport","version":"1.0","type":"link"}