{"product_id":"3-8-40-threaded-shank-stop-countersink-1-4-28-threaded-shank-hss_tsc3-8-40","title":"3\/8\"-#40 Threaded Shank Stop Countersink | HSS | 1\/4\"-28 Threaded Shank | TSC3\/8-40","description":"\u003cdiv\u003eIndustrial-grade stop countersinks with threaded shanks enable precise countersinking in CNC and manual machining environments. Built from high-speed steel to withstand heat and retain edge geometry under continuous use. \u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: HSS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariant 1\u003c\/strong\u003e – \u003cstrong\u003eShank diameter\u003c\/strong\u003e 3\/8 inch; \u003cstrong\u003eThread type\u003c\/strong\u003e #40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariant 2\u003c\/strong\u003e – \u003cstrong\u003eShank diameter\u003c\/strong\u003e 1\/4 inch; \u003cstrong\u003eThread type\u003c\/strong\u003e 1\/4-28\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStop countersink\u003c\/strong\u003e: Maintains consistent countersink depth across multiple holes to reduce depth variation and scrap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded shank\u003c\/strong\u003e: Enables secure seating in tool holders and collets; supports rapid tool changes and vibration resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial advantages\u003c\/strong\u003e: High-Speed Steel core provides wear resistance and edge retention under high cutting temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariants\u003c\/strong\u003e: Two shank diameters available to fit different spindle adapters and tooling configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications\u003c\/strong\u003e: Suitable for producing flush or near flush fastener heads in steel, aluminum, and other metal workpieces in industrial manufacturing environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":53412456956183,"sku":"TSC3\/8-40","price":9.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/7.jpg?v=1779454687","url":"https:\/\/mutualscrew.com\/products\/3-8-40-threaded-shank-stop-countersink-1-4-28-threaded-shank-hss_tsc3-8-40","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}