{"product_id":"5-16-x-3-32-aircraft-counterbore-1-4-round-shank-4-flute-hss_dewa-ccbr5-16","title":"5\/16\" X 3\/32\" Aircraft Counterbore | HSS | 1\/4\" Round Shank | 4 Flute | DEWA\/CCBR5\/16","description":"\u003cdiv\u003e\n\u003cp\u003eIndustrial-grade counterbore tooling for aerospace and industrial machinery applications.\u003c\/p\u003e\n\u003cp\u003eThe 5\/16 inch counterbore diameter, 3\/32 inch depth, 1\/4 inch round shank, 4 flute configuration, and HSS construction deliver precise hole preparation for metal assemblies.\u003c\/p\u003e \u003ch2\u003eSpecs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions\u003c\/strong\u003e: Counterbore diameter 5\/16 inch; Counterbore depth 3\/32 inch; Shank diameter 1\/4 inch; Shank type: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial grade\u003c\/strong\u003e: HSS (High-Speed Steel)\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlutes\u003c\/strong\u003e: 4 — Enhances chip evacuation and cutting stability in metal hole preparation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank\u003c\/strong\u003e: Round 1\/4 inch — Compatible with standard collets and holders used in milling and drilling equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCounterbore geometry\u003c\/strong\u003e: 5\/16 inch diameter; 3\/32 inch depth — Creates a cylindrical recess for bolt head seating in through holes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial properties\u003c\/strong\u003e: HSS — Exhibits high wear resistance and elevated temperature tolerance for repeated cutting cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":53412322083095,"sku":"DEWA\/CCBR5\/16","price":25.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/52.jpg?v=1779460151","url":"https:\/\/mutualscrew.com\/products\/5-16-x-3-32-aircraft-counterbore-1-4-round-shank-4-flute-hss_dewa-ccbr5-16","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}