{"product_id":"starrett-689-countersink-gage-100-degree","title":"Starrett 689 Series Countersink Gage — 100°","description":"\u003cp\u003eThe Starrett 689 Series reads the large diameter of a 100° countersink directly, in .002\" increments. As with the rest of the Starrett countersink family, the gage head seats on the angular face of the countersink, so the reading reflects the countersink itself rather than the edge break.\u003c\/p\u003e\n\u003ch2\u003eWhy 100°\u003c\/h2\u003e\n\u003cp\u003e100° countersinks appear throughout aerospace flush-fastener practice, where the shallower cone spreads bearing load over thin skins. Starrett's \u003ca href=\"\/products\/starrett-687-countersink-gage-82-degree\"\u003e82°\u003c\/a\u003e and \u003ca href=\"\/products\/starrett-688-countersink-gage-90-degree\"\u003e90°\u003c\/a\u003e gages cover inch and metric flat-head work respectively. The angle is fixed per gage — the countersink angle on the print determines which gage to use.\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 depress the gage head into the countersink; the reading holds when the gage is removed until reset.\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 skin and structure flush-fastener inspection, rivet and Hi-Lok countersink qualification, airframe assembly verification, incoming and in-process inspection.\u003c\/p\u003e","brand":"WESTport Corp.","offers":[{"title":".020-.170\"","offer_id":51285614886948,"sku":"689-1Z","price":0.01,"currency_code":"USD","in_stock":true},{"title":".160-.360\"","offer_id":51285614919716,"sku":"689-2Z","price":0.01,"currency_code":"USD","in_stock":true},{"title":".360-.560\"","offer_id":51285614952484,"sku":"689-3Z","price":0.01,"currency_code":"USD","in_stock":true},{"title":".560-.780\"","offer_id":51285614985252,"sku":"689-4Z","price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/STARRETT_689_COUNTERSINK_GAGE_100.png?v=1787162946","url":"https:\/\/westportcorp.com\/products\/starrett-689-countersink-gage-100-degree","provider":"WESTport","version":"1.0","type":"link"}