{"id":4521,"date":"2026-10-24T09:14:51","date_gmt":"2026-10-24T01:14:51","guid":{"rendered":"https:\/\/www.carbon-fiber-corp.com\/carbon-fibre-counterbore-countersink-section\/"},"modified":"2026-10-24T09:14:51","modified_gmt":"2026-10-24T01:14:51","slug":"carbon-fibre-counterbore-countersink-section","status":"publish","type":"post","link":"https:\/\/www.carbon-fiber-corp.com\/fr\/carbon-fibre-counterbore-countersink-section\/","title":{"rendered":"Counterbore or Countersink in a Carbon Fibre Part? Show the Section"},"content":{"rendered":"<style>.ly-note{max-width:880px;margin:0 auto;color:#26333c;line-height:1.85;font-size:17px}.ly-note h2{font-size:1.5rem;line-height:1.35;margin:1.8em 0 .6em}.ly-note p{margin:0 0 1.2em}.ly-note .intro{font-size:1.08em}.ly-note figure{margin:2em 0}.ly-note figure img{display:block;width:100%;height:auto}.ly-note figcaption{font-size:.88rem;color:#60727d;line-height:1.55;margin-top:10px}.ly-note ul{padding-left:1.4em}.ly-note li{margin:.45em 0}.ly-note a{color:#8e1e34;text-decoration:underline;text-underline-offset:3px}.ly-note .notes{padding:20px 28px;background:#f0f4f5;border-left:3px solid #296c85;margin:2em 0}.ly-note .notes h2{font-size:1.1rem;margin:0 0 .8em}.ly-note .reading{border-top:1px solid #d9e1e5;margin-top:2em;padding-top:1.1em}.single-post .entry-title{font-size:clamp(1.8rem,3.8vw,2.6rem);line-height:1.25}.single-post .post-thumb-img-content img{width:100%;height:auto;max-height:360px;object-fit:contain;background:#fbfcfc}@media(max-width:600px){.ly-note{font-size:16px}.ly-note h2{font-size:1.3rem}.ly-note .notes{padding:17px}}<\/style><div class=\"ly-note\"><p class=\"intro\">A counterbore is a cylindrical recess with a shoulder; a countersink is a conical recess. Name the intended feature and show its section with the actual hardware. \u201cRecess the screw head\u201d leaves the tool geometry, seating condition and remaining material unclear.<\/p><h2>Start with the fastener<\/h2><p>Provide the exact head geometry and any washer or seating component. A cylindrical head and a conical head need different seating details. The recess definition should include the relevant dimensions and location, not only the nominal screw thread size.<\/p><h2>Show what remains underneath<\/h2><p>In a carbon laminate, the required remaining construction needs review alongside the recess. A head appearing flush in a rendering does not establish a suitable joint. Include the laminate or local construction definition and ask the responsible engineer to review the seating and load path. This article specifies no universal recess depth or tightening torque.<\/p><h2>Inspect the feature that was specified<\/h2><p>Agree whether the check concerns recess geometry, hardware seating, flushness in an assembly or another requirement. Record the represented fastener and part revision with a sample fit check. If a supplier proposes a spotface or another alternative, retain the changed definition for review rather than treating all head-clearance operations as equivalent. A section drawing usually resolves the naming ambiguity before it reaches machining.<\/p><figure><a href=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261024-14-recess-2.webp\" aria-label=\"Open the full-size diagram\"><img src=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261024-14-recess-2.webp\" alt=\"Head seating and the remaining local construction belong in the same section review.\" width=\"1600\" height=\"1000\" loading=\"lazy\" decoding=\"async\"><\/a><figcaption>Head seating and the remaining local construction belong in the same section review. <a href=\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261024-14-recess-2.webp\">View full size<\/a>.<\/figcaption><\/figure><aside class=\"notes\"><h2>Useful information for an enquiry<\/h2><ul><li>Exact head and seating hardware<\/li><li>Recess type and section dimensions<\/li><li>Remaining laminate or local construction<\/li><li>Agreed geometric and assembly checks<\/li><\/ul><\/aside><div class=\"reading\"><p>Related: <a href=\"https:\/\/www.carbon-fiber-corp.com\/clearance-holes-and-countersinks-in-carbon-fiber-define-the-hardware-interface\/\">Clearance Holes and Countersinks in Carbon Fiber: Define the Hardware Interface<\/a> \u00b7 <a href=\"https:\/\/www.carbon-fiber-corp.com\/carbon-fibre-panel-latch-striker-position\/\">Carbon Fibre Panel Latches: Locate the Striker in the Closed Assembly<\/a>.<\/p><p><a href=\"https:\/\/www.carbon-fiber-corp.com\/contact\/\">Discuss your component with Litian Yunde<\/a> \u00b7 <a href=\"https:\/\/www.carbon-fiber-corp.com\/carbon-fiber-guides\/\">Browse the component guides<\/a><\/p><\/div><\/div><script type=\"application\/ld+json\" class=\"ly-article-schema\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BlogPosting\", \"@id\": \"https:\/\/www.carbon-fiber-corp.com\/carbon-fibre-counterbore-countersink-section\/#article\", \"headline\": \"Counterbore or Countersink in a Carbon Fibre Part? Show the Section\", \"description\": \"Specify cylindrical and conical fastener recesses clearly in carbon fibre parts. Show hardware seating, recess geometry and remaining construction.\", \"image\": [\"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261024-14-recess-1.webp\", \"https:\/\/www.carbon-fiber-corp.com\/wp-content\/uploads\/2026\/10\/ly-geo-20261024-14-recess-2.webp\"], \"datePublished\": \"2026-10-24T01:14:51Z\", \"mainEntityOfPage\": {\"@type\": \"WebPage\", \"@id\": \"https:\/\/www.carbon-fiber-corp.com\/carbon-fibre-counterbore-countersink-section\/\"}, \"author\": {\"@type\": \"Organization\", \"name\": \"Litian Yunde\", \"url\": \"https:\/\/www.carbon-fiber-corp.com\/about\/\"}, \"publisher\": {\"@type\": \"Organization\", \"name\": \"Dongguan Litian Yunde New Materials Technology Co., Ltd.\", \"url\": \"https:\/\/www.carbon-fiber-corp.com\/\"}, \"inLanguage\": \"en\", \"articleSection\": \"Machining & Assembly\"}<\/script>","protected":false},"excerpt":{"rendered":"<p>A counterbore is a cylindrical recess with a shoulder; a countersink is a conical recess. Name the intended feature and show its section with the actual hardware. \u201cRecess the screw head\u201d leaves the tool geometry, seating condition and remaining material unclear.<\/p>","protected":false},"author":1,"featured_media":4494,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Carbon Fibre Counterbore and Countersink Sections | Litian Yunde","_seopress_titles_desc":"Specify cylindrical and conical fastener recesses clearly in carbon fibre parts. 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