{"title":"Conduit Box Couplers","description":"\u003cp\u003eConduit box couplers are the fittings that connect the end of a conduit run — rigid or flexible — to a junction box, back-box or electrical enclosure. They create a secure, mechanically strong entry point that protects cables from chafing at the conduit edge and, in many cases, provides an element of IP ingress protection for the enclosure. Choosing the right coupler ensures your conduit system holds together under vibration, thermal cycling and day-to-day use.\u003c\/p\u003e\n\n\u003ch3\u003eRigid vs. Flexible Conduit Box Couplers\u003c\/h3\u003e\n\u003cp\u003eRigid PVC conduit couplers are designed to fit standard round or oval conduit with a fixed outside diameter. They screw or push into a threaded knockout on the enclosure and lock with a back-nut. Flexible conduit box couplers feature a smooth or corrugated gland body that grips flexible conduit while allowing a small degree of movement — important in machinery and panel wiring where vibration is present. For the conduit itself, see our \u003ca href=\"\/en-gb\/collections\/lighting-rigid-conduits\"\u003eRigid PVC Tubing\u003c\/a\u003e and \u003ca href=\"\/en-gb\/collections\/lighting-flexible-conduits\"\u003eFlexible Conduits\u003c\/a\u003e ranges within the broader \u003ca href=\"\/en-gb\/collections\/lighting-conduits-tubing\"\u003eConduits \u0026amp; Tubing\u003c\/a\u003e family.\u003c\/p\u003e\n\n\u003ch3\u003eSize and Thread Standards\u003c\/h3\u003e\n\u003cp\u003eBox couplers are sized to match metric conduit outside diameters — most commonly 16 mm, 20 mm, 25 mm, 32 mm and 40 mm. The thread form for the locknut is typically metric ISO or PG (Panzergewinde) — confirm which standard your enclosure uses before ordering. Wrong-thread combinations can cross-thread and damage both the coupler and the enclosure knock-out. Complementary fittings such as \u003ca href=\"\/en-gb\/collections\/lighting-conduit-couplings\"\u003eCouplings \u0026amp; Fittings\u003c\/a\u003e and \u003ca href=\"\/en-gb\/collections\/lighting-conduit-angle-tjoint\"\u003eConduit Angle \u0026amp; T-Joint Couplers\u003c\/a\u003e complete a full conduit installation.\u003c\/p\u003e\n\n\u003ch3\u003eIP Rating Considerations\u003c\/h3\u003e\n\u003cp\u003eIf you need IP54 or higher protection at the entry point, choose a coupler with an integral sealing ring or a separate IP-rated gland. The coupler's IP rating must match or exceed the enclosure's rating — a weak entry point undermines the overall protection level of the assembly. For outdoor or wet-area wiring, this is especially important.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy from Lynk?\u003c\/h3\u003e\n\u003cp\u003eOur conduit fittings are stocked from trusted manufacturers and verified before dispatch. Orders over €80 ship free with fast delivery across Greece. Every purchase is backed by \u003ca href=\"\/en-gb\/pages\/buyer-protection\"\u003eLynk Buyer Protection\u003c\/a\u003e. Also explore our \u003ca href=\"\/en-gb\/collections\/power-cables-batteries\"\u003ePower \u0026amp; Cables\u003c\/a\u003e section for cables to run through your conduit system.\u003c\/p\u003e","products":[{"product_id":"courbi-racor-box-rigid-conduit-f16-d23-heavy-html","title":"Courbi Racor Φ16→D23 Box-Entry Conduit Coupler Heavy Duty 10-Pack – IP54 \u0026 EN 61386","description":"\u003cp\u003eThe Courbi Racor box-to-rigid-conduit coupling Φ16\u0026gt;D23 Heavy provides a secure, IP 54-rated connection between a Φ16 mm rigid straight conduit pipe and a junction box with a D23 entry knockout. It is designed for use with the Courbi Straight conduit range (COMBO, DOMO, FORTE).\u003c\/p\u003e\u003cp\u003eManufactured to EN 61386-1\/2004 and EN 61386-22\/2004, it meets the standards required for electrical conduit installations in residential and commercial buildings. The heavy duty rating confirms suitability for mechanically demanding environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBox-to-rigid-conduit coupling connecting Φ16 mm conduit to a D23 box entry\u003c\/li\u003e\n\u003cli\u003eIP 54 sealing degree against dust ingress and water splashing\u003c\/li\u003e\n\u003cli\u003eCompatible with Courbi Straight COMBO, DOMO, FORTE rigid conduit systems\u003c\/li\u003e\n\u003cli\u003eColour: grey, RAL 7035\u003c\/li\u003e\n\u003cli\u003eHeavy Duty rated construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Benefits\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eProvides a sealed, standards-compliant transition between conduit and junction box\u003c\/li\u003e\n\u003cli\u003eIP 54 protection prevents contamination at the conduit entry point\u003c\/li\u003e\n\u003cli\u003eCompliance with EN 61386-1\/2004 and EN 61386-22\/2004 supports regulatory acceptance for electrical installations\u003c\/li\u003e\n\u003cli\u003ePack of 10 supplies enough fittings for multi-box installations in a single purchase\u003c\/li\u003e\n\u003cli\u003eΦ16\u0026gt;D23 size pairing covers the most common rigid conduit and box entry combination\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Racor — box to rigid conduit coupling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConduit Diameter:\u003c\/strong\u003e Φ16 mm \u0026gt; Φ16 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Entry Diameter:\u003c\/strong\u003e D23\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Designation:\u003c\/strong\u003e Φ16\u0026gt;D23\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealing Degree:\u003c\/strong\u003e IP 54\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Grey, RAL 7035\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuty Rating:\u003c\/strong\u003e Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplicable Standards:\u003c\/strong\u003e EN 61386-1\/2004, EN 61386-22\/2004\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Conduit Systems:\u003c\/strong\u003e Straight COMBO, DOMO, FORTE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 10 pcs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy You'll Love It\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReady to use with Courbi Straight conduit — no adapters required\u003c\/li\u003e\n\u003cli\u003ePack of 10 covers a full electrical installation with multiple junction boxes\u003c\/li\u003e\n\u003cli\u003eRAL 7035 grey finish integrates neatly with standard conduit systems\u003c\/li\u003e\n\u003cli\u003ePackage includes 1× Courbi Racor Box to Rigid Conduit Φ16\u0026gt;D23 Heavy 10 pcs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Other","offers":[{"title":"Default Title","offer_id":56577688928638,"sku":"535046","price":1.4,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/2250\/3550\/files\/15674721993086.webp?v=1779631965"},{"product_id":"courbi-racor-box-to-rigid-conduit-ph20-d23-heavy-html","title":"Courbi Racor Φ20→D23 Box-Entry Conduit Coupler Heavy Duty 10-Pack – IP54 \u0026 EN 61386","description":"\u003cp\u003eThe Courbi Racor box-to-rigid-conduit coupling Φ20\u0026gt;D23 Heavy provides a secure, IP 54-rated connection between a Φ20 mm rigid straight conduit pipe and a junction box with a D23 entry knockout. It is designed for use with the Courbi Straight conduit range (COMBO, DOMO, FORTE).\u003c\/p\u003e\u003cp\u003eManufactured to EN 61386-1\/2004 and EN 61386-22\/2004, it meets the standards required for electrical conduit installations in residential and commercial buildings. The heavy duty rating confirms suitability for mechanically demanding environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBox-to-rigid-conduit coupling connecting Φ20 mm conduit to a D23 box entry\u003c\/li\u003e\n\u003cli\u003eIP 54 sealing degree against dust ingress and water splashing\u003c\/li\u003e\n\u003cli\u003eCompatible with Courbi Straight COMBO, DOMO, FORTE rigid conduit systems\u003c\/li\u003e\n\u003cli\u003eColour: grey, RAL 7035\u003c\/li\u003e\n\u003cli\u003eHeavy Duty rated construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Benefits\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eProvides a sealed, standards-compliant transition between conduit and junction box\u003c\/li\u003e\n\u003cli\u003eIP 54 protection prevents contamination at the conduit entry point\u003c\/li\u003e\n\u003cli\u003eCompliance with EN 61386-1\/2004 and EN 61386-22\/2004 supports regulatory acceptance for electrical installations\u003c\/li\u003e\n\u003cli\u003ePack of 10 supplies enough fittings for multi-box installations in a single purchase\u003c\/li\u003e\n\u003cli\u003eΦ20\u0026gt;D23 pairing allows a 20 mm conduit to enter a standard D23 box knockout\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Racor — box to rigid conduit coupling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConduit Diameter:\u003c\/strong\u003e Φ20 mm \u0026gt; Φ20 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Entry Diameter:\u003c\/strong\u003e D23\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Designation:\u003c\/strong\u003e Φ20\u0026gt;D23\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealing Degree:\u003c\/strong\u003e IP 54\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Grey, RAL 7035\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuty Rating:\u003c\/strong\u003e Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplicable Standards:\u003c\/strong\u003e EN 61386-1\/2004, EN 61386-22\/2004\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Conduit Systems:\u003c\/strong\u003e Straight COMBO, DOMO, FORTE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 10 pcs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy You'll Love It\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReady to use with Courbi Straight conduit — no adapters required\u003c\/li\u003e\n\u003cli\u003ePack of 10 covers a full electrical installation with multiple junction boxes\u003c\/li\u003e\n\u003cli\u003eRAL 7035 grey finish integrates neatly with standard conduit systems\u003c\/li\u003e\n\u003cli\u003ePackage includes 1× Courbi Racor Box to Rigid Conduit Φ20\u0026gt;D23 Heavy 10 pcs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Other","offers":[{"title":"Default Title","offer_id":56577689649534,"sku":"535047","price":1.8,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/2250\/3550\/files\/15674722156926.webp?v=1779631970"},{"product_id":"courbi-racor-box-to-rigid-conduit-ph20-d29-heavy-html","title":"Courbi Racor Φ20→D29 Box-Entry Conduit Coupler Heavy Duty 10-Pack – IP54 \u0026 EN 61386","description":"\u003cp\u003eThe Courbi Racor box-to-rigid-conduit coupling Φ20\u0026gt;D29 Heavy provides a secure, IP 54-rated connection between a Φ20 mm rigid straight conduit pipe and a junction box with a D29 entry knockout. It is designed for use with the Courbi Straight conduit range (COMBO, DOMO, FORTE).\u003c\/p\u003e\u003cp\u003eManufactured to EN 61386-1\/2004 and EN 61386-22\/2004, it meets the standards required for electrical conduit installations in residential and commercial buildings. The heavy duty rating confirms suitability for mechanically demanding environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBox-to-rigid-conduit coupling connecting Φ20 mm conduit to a D29 box entry\u003c\/li\u003e\n\u003cli\u003eIP 54 sealing degree against dust ingress and water splashing\u003c\/li\u003e\n\u003cli\u003eCompatible with Courbi Straight COMBO, DOMO, FORTE rigid conduit systems\u003c\/li\u003e\n\u003cli\u003eColour: grey, RAL 7035\u003c\/li\u003e\n\u003cli\u003eHeavy Duty rated construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Benefits\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eProvides a sealed, standards-compliant transition between conduit and junction box\u003c\/li\u003e\n\u003cli\u003eIP 54 protection prevents contamination at the conduit entry point\u003c\/li\u003e\n\u003cli\u003eCompliance with EN 61386-1\/2004 and EN 61386-22\/2004 supports regulatory acceptance for electrical installations\u003c\/li\u003e\n\u003cli\u003ePack of 10 supplies enough fittings for multi-box installations in a single purchase\u003c\/li\u003e\n\u003cli\u003eD29 box entry suits larger junction boxes where a wider knockout is used\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Racor — box to rigid conduit coupling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConduit Diameter:\u003c\/strong\u003e Φ20 mm \u0026gt; Φ20 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Entry Diameter:\u003c\/strong\u003e D29\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Designation:\u003c\/strong\u003e Φ20\u0026gt;D29\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealing Degree:\u003c\/strong\u003e IP 54\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Grey, RAL 7035\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuty Rating:\u003c\/strong\u003e Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplicable Standards:\u003c\/strong\u003e EN 61386-1\/2004, EN 61386-22\/2004\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Conduit Systems:\u003c\/strong\u003e Straight COMBO, DOMO, FORTE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 10 pcs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy You'll Love It\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eD29 box entry variant extends compatibility to larger junction box knockouts\u003c\/li\u003e\n\u003cli\u003ePack of 10 covers a full electrical installation with multiple junction boxes\u003c\/li\u003e\n\u003cli\u003eRAL 7035 grey finish integrates neatly with standard conduit systems\u003c\/li\u003e\n\u003cli\u003ePackage includes 1× Courbi Racor Box to Rigid Conduit Φ20\u0026gt;D29 Heavy 10 pcs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Other","offers":[{"title":"Default Title","offer_id":56577689846142,"sku":"535048","price":1.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/2250\/3550\/files\/15674722255230.webp?v=1779631974"},{"product_id":"courbi-racor-box-to-rigid-conduit-ph25-d29-heavy-html","title":"Courbi Racor Φ25→D29 Box-Entry Conduit Coupler Heavy Duty 5-Pack – IP54 \u0026 EN 61386","description":"\u003cp\u003eThe Courbi Racor box-to-rigid-conduit coupling Φ25\u0026gt;D29 Heavy provides a secure, IP 54-rated connection between a Φ25 mm rigid straight conduit pipe and a junction box with a D29 entry knockout. It is designed for use with the Courbi Straight conduit range (COMBO, DOMO, FORTE).\u003c\/p\u003e\u003cp\u003eManufactured to EN 61386-1\/2004 and EN 61386-22\/2004, it meets the standards required for electrical conduit installations in residential and commercial buildings. The heavy duty rating confirms suitability for mechanically demanding environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBox-to-rigid-conduit coupling connecting Φ25 mm conduit to a D29 box entry\u003c\/li\u003e\n\u003cli\u003eIP 54 sealing degree against dust ingress and water splashing\u003c\/li\u003e\n\u003cli\u003eCompatible with Courbi Straight COMBO, DOMO, FORTE rigid conduit systems\u003c\/li\u003e\n\u003cli\u003eColour: grey, RAL 7035\u003c\/li\u003e\n\u003cli\u003eHeavy Duty rated construction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Benefits\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eProvides a sealed, standards-compliant transition between conduit and junction box\u003c\/li\u003e\n\u003cli\u003eIP 54 protection prevents contamination at the conduit entry point\u003c\/li\u003e\n\u003cli\u003eCompliance with EN 61386-1\/2004 and EN 61386-22\/2004 supports regulatory acceptance for electrical installations\u003c\/li\u003e\n\u003cli\u003eΦ25\u0026gt;D29 pairing suits installations requiring a larger-diameter conduit at the box entry\u003c\/li\u003e\n\u003cli\u003ePack of 5 is practical for smaller runs or supplementary stock\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Racor — box to rigid conduit coupling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConduit Diameter:\u003c\/strong\u003e Φ25 mm \u0026gt; Φ25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox Entry Diameter:\u003c\/strong\u003e D29\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Designation:\u003c\/strong\u003e Φ25\u0026gt;D29\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealing Degree:\u003c\/strong\u003e IP 54\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Grey, RAL 7035\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuty Rating:\u003c\/strong\u003e Heavy Duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplicable Standards:\u003c\/strong\u003e EN 61386-1\/2004, EN 61386-22\/2004\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Conduit Systems:\u003c\/strong\u003e Straight COMBO, DOMO, FORTE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 5 pcs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eWhy You'll Love It\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eΦ25 mm conduit diameter accommodates heavier cable bundles entering junction boxes\u003c\/li\u003e\n\u003cli\u003eReady to use with Courbi Straight conduit — no adapters required\u003c\/li\u003e\n\u003cli\u003eRAL 7035 grey finish integrates neatly with standard conduit systems\u003c\/li\u003e\n\u003cli\u003ePackage includes 1× Courbi Racor Box to Rigid Conduit Φ25\u0026gt;D29 Heavy 5 pcs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Other","offers":[{"title":"Default Title","offer_id":56577689944446,"sku":"535049","price":1.25,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/2250\/3550\/files\/15674722320766.webp?v=1779615363"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/2250\/3550\/collections\/lighting-conduit-box-couplers.webp?v=1780734134","url":"https:\/\/lynk.gr\/en-gb\/collections\/lighting-conduit-box-couplers.oembed","provider":"Lynk.gr","version":"1.0","type":"link"}