{"id":9849,"date":"2026-06-05T23:53:47","date_gmt":"2026-06-05T20:53:47","guid":{"rendered":"https:\/\/altal.md\/?post_type=product&#038;p=9849"},"modified":"2026-06-29T15:29:35","modified_gmt":"2026-06-29T12:29:35","slug":"corrugated-conduit-coupling-ad28-5","status":"publish","type":"product","link":"https:\/\/altal.md\/en\/mufta-pentru-tuburi-gofrate-ad28-5\/","title":{"rendered":"AD28.5\/PG21 corrugated pipe coupling"},"content":{"rendered":"<h2><strong>AD28.5\/PG21 conduit connector \u2013 secure connection for large cables<\/strong><\/h2>\n<p class=\"isSelectedEnd\">The AD28.5\/PG21 corrugated tube coupling is designed for quick and leak-proof connection of corrugated tubes with an outer diameter of 28.5 mm to electrical housings, switchboards, automation cabinets and other technical equipment. Thanks to the standard PG21 thread, the product ensures simple mounting and a reliable connection in professional applications.<\/p>\n<p class=\"isSelectedEnd\">In industrial and commercial electrical installations, cables must be protected against moisture, dust and mechanical damage. The AD28.5\/PG21 conduit fitting creates a secure connection between the protective tube and the electrical equipment, helping to maintain the protection level of the installation and increase the service life of the wiring.<\/p>\n<p class=\"isSelectedEnd\">Degree of protection <a href=\"https:\/\/en.wikipedia.org\/wiki\/IP_code\" target=\"_blank\" rel=\"noopener\">IP68<\/a> allows the use of the product in harsh environments, including places with high humidity, dust, or exposure to the elements. For this reason, the AD28.5\/PG21 corrugated conduit gland is frequently used in industry, HVAC systems, photovoltaic installations, technical infrastructure, and automation applications.<\/p>\n<p class=\"isSelectedEnd\">The integrated locking system firmly secures the corrugated tube and prevents accidental loosening during operation. In the event of maintenance work, the tube can be quickly released by pressing the locking ring, without the need for special tools.<\/p>\n<p class=\"isSelectedEnd\">Made of polyamide resistant to shocks and temperature variations, the AD28.5\/PG21 corrugated tube coupling offers high reliability and consistent long-term performance, even under intensive use conditions.<\/p>\n<h3>Advantages<\/h3>\n<ul data-spread=\"false\">\n<li>Compatible with corrugated tube AD28.5 mm;<\/li>\n<li>Filet standard PG21;<\/li>\n<li>IP68 protection against water and dust;<\/li>\n<li>Quick assembly without special tools;<\/li>\n<li>Secure tube fixing system;<\/li>\n<li>Easy disassembly for service work;<\/li>\n<li>High mechanical resistance;<\/li>\n<li>Suitable for industrial and commercial applications.<\/li>\n<\/ul>\n<h2>Frequently Asked Questions (FAQ)<\/h2>\n<h3>What is this plug used for?<\/h3>\n<p class=\"isSelectedEnd\">It is used for connecting AD28.5 corrugated tubes to electrical panels, junction boxes and industrial equipment.<\/p>\n<h3>What type of thread does the product have?<\/h3>\n<p class=\"isSelectedEnd\">The coupling is equipped with a PG21 external thread.<\/p>\n<h3>Can it be used outdoors?<\/h3>\n<p class=\"isSelectedEnd\">Yes, the IP68 rating provides excellent water and dust resistance.<\/p>\n<h3>Is it necessary to use special tools?<\/h3>\n<p class=\"isSelectedEnd\">No. Assembly and disassembly are quick and easy.<\/p>\n<h3>How is the tube secured in the connector?<\/h3>\n<p>Through a locking system that prevents accidental extraction of the tube.<\/p>\n<h2 data-start=\"3235\" data-end=\"3301\">Feature m<span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">corrugated tube oil AD28.5<\/span><\/h2>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" style=\"height: 324px; width: 47.8198%; border-style: solid; border-color: #000000;\" border=\"1\" data-start=\"144\" data-end=\"475\">\n<thead data-start=\"144\" data-end=\"172\">\n<tr style=\"height: 36px;\" data-start=\"144\" data-end=\"172\">\n<th class=\"last:pe-10\" style=\"width: 22.8205%; height: 36px;\" data-start=\"144\" data-end=\"161\" data-col-size=\"sm\">Characteristic<\/th>\n<th class=\"last:pe-10\" style=\"width: 24.6154%; height: 36px;\" data-start=\"161\" data-end=\"172\" data-col-size=\"sm\">Value<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"203\" data-end=\"475\">\n<tr style=\"height: 36px;\" data-start=\"203\" data-end=\"254\">\n<td style=\"width: 22.8205%; height: 36px;\" data-start=\"203\" data-end=\"216\" data-col-size=\"sm\">Product type<\/td>\n<td style=\"width: 24.6154%; height: 36px; text-align: center;\" data-col-size=\"sm\" data-start=\"216\" data-end=\"254\">Straight connector for corrugated tubes<\/td>\n<\/tr>\n<tr style=\"height: 36px;\" data-start=\"255\" data-end=\"294\">\n<td style=\"width: 22.8205%; height: 36px;\" data-start=\"255\" data-end=\"284\" data-col-size=\"sm\">Corrugated tube size<\/td>\n<td style=\"width: 24.6154%; height: 36px; text-align: center;\" data-col-size=\"sm\" data-start=\"284\" data-end=\"294\">AD28.5<\/td>\n<\/tr>\n<tr style=\"height: 36px;\" data-start=\"295\" data-end=\"317\">\n<td style=\"width: 22.8205%; height: 36px;\" data-start=\"295\" data-end=\"307\" data-col-size=\"sm\">Tip filet<\/td>\n<td style=\"width: 24.6154%; height: 36px; text-align: center;\" data-start=\"307\" data-end=\"317\" data-col-size=\"sm\">PG21<\/td>\n<\/tr>\n<tr style=\"height: 36px;\" data-start=\"318\" data-end=\"363\">\n<td style=\"width: 22.8205%; height: 36px;\" data-start=\"318\" data-end=\"352\" data-col-size=\"sm\">Thread outer diameter<\/td>\n<td style=\"width: 24.6154%; height: 36px; text-align: center;\" data-col-size=\"sm\" data-start=\"352\" data-end=\"363\">28.3 mm<\/td>\n<\/tr>\n<tr style=\"height: 36px;\" data-start=\"364\" data-end=\"396\">\n<td style=\"width: 22.8205%; height: 36px;\" data-start=\"364\" data-end=\"385\" data-col-size=\"sm\">Thread length<\/td>\n<td style=\"width: 24.6154%; height: 36px; text-align: center;\" data-col-size=\"sm\" data-start=\"385\" data-end=\"396\">13 mm<\/td>\n<\/tr>\n<tr style=\"height: 36px;\" data-start=\"397\" data-end=\"426\">\n<td style=\"width: 22.8205%; height: 36px;\" data-start=\"397\" data-end=\"408\" data-col-size=\"sm\">Material<\/td>\n<td style=\"width: 24.6154%; height: 36px; text-align: center;\" data-col-size=\"sm\" data-start=\"408\" data-end=\"426\">Polyamide (PA)<\/td>\n<\/tr>\n<tr style=\"height: 36px;\" data-start=\"427\" data-end=\"455\">\n<td style=\"width: 22.8205%; height: 36px;\" data-start=\"427\" data-end=\"447\" data-col-size=\"sm\">Degree of protection<\/td>\n<td style=\"width: 24.6154%; height: 36px; text-align: center;\" data-start=\"447\" data-end=\"455\" data-col-size=\"sm\">IP68<\/td>\n<\/tr>\n<tr style=\"height: 36px;\" data-start=\"456\" data-end=\"475\">\n<td style=\"width: 22.8205%; height: 36px;\" data-start=\"456\" data-end=\"466\" data-col-size=\"sm\">Color<\/td>\n<td style=\"width: 24.6154%; height: 36px; text-align: center;\" data-col-size=\"sm\" data-start=\"466\" data-end=\"475\">Black<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h3 data-section-id=\"94cugx\" data-start=\"3303\" data-end=\"3326\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Recommended products<\/span><\/h3>\n<ul data-start=\"3328\" data-end=\"3515\" data-is-last-node=\"\" data-is-only-node=\"\">\n<li data-section-id=\"3xoguk\" data-start=\"3328\" data-end=\"3356\"><a href=\"https:\/\/altal.md\/en\/corrugated-conduit-18-5-mm-black-with-draw-wire\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Flexible corrugated tube AD28.5<\/span><\/a><\/li>\n<li data-section-id=\"ndh1zq\" data-start=\"3357\" data-end=\"3383\"><a href=\"https:\/\/altal.md\/en\/mufta-unghiulara-90-pentru-tuburi-gofrate-ad18-5b\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">90\u00b0 angled coupling<\/span><\/a><\/li>\n<li data-section-id=\"1tf8ffa\" data-start=\"3384\" data-end=\"3419\"><a href=\"https:\/\/altal.md\/en\/black-heat-shrink-tubing-12-mm\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Black heat shrink tube 12 mm<\/span><\/a><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/altal.md\/en\/perforated-cable-trunking-35x40x2000mm\/\" target=\"_blank\" rel=\"noopener\">Nylon cable ties 2.5 x 200 mm.<\/a><\/span><\/li>\n<li data-section-id=\"1rdard\" data-start=\"3451\" data-end=\"3473\"><a href=\"https:\/\/altal.md\/en\/corrugated-conduit-18-5-mm-black-with-draw-wire\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Perforated cable channel<\/span><\/a><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\"><a style=\"color: #000000;\" href=\"https:\/\/altal.md\/en\/tb-terminal-block-tb-2505\/\" target=\"_blank\" rel=\"noopener\">Bloc terminal 25A<\/a><\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<hr \/>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<h2><strong><span style=\"color: #800080; font-family: arial, helvetica, sans-serif;\">Model: <\/span><span style=\"color: #800080; font-family: arial, helvetica, sans-serif;\">AD28.5\/<\/span><span style=\"color: #800080; font-family: arial, helvetica, sans-serif;\">PG21<\/span><\/strong><\/h2>\n<ul>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Name: <strong>Corrugated tube coupling <\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Connection type: <strong>Straight connector<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Outer tube diameter: <strong>28.5 mm<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Filet: <strong>PG21<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Mounting size: <strong>28,3 mm<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Degree of protection: <strong>IP68<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Material:<strong> Polyamide<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Color: <strong>BLACK<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Length: <strong>47 mm<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Assembly: <strong>without special tools<\/strong><\/span><\/li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Application: <strong>Connecting corrugated tubes to electrical panels, distribution boxes and electrical equipment.<\/strong><\/span><\/li>\n<\/ul>\n<hr \/>\n<p>&nbsp;<\/p>","protected":false},"featured_media":9854,"comment_status":"open","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"default","_kad_post_title":"","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"product_brand":[198],"product_cat":[1066,183,987],"product_tag":[1001,997,1067,1070,996],"class_list":["post-9849","product","type-product","status-publish","has-post-thumbnail","product_brand-altal","product_cat-cuplaj-pentru-tuburi-gofrate","product_cat-catalog","product_cat-produse-electrice","product_tag-28-5-mm","product_tag-gofrat","product_tag-mufta","product_tag-pg21","product_tag-tub","product_shipping_class-greutate-mica","first","instock","featured","taxable","shipping-taxable","purchasable","product-type-simple","entry","content-bg","loop-entry"],"_links":{"self":[{"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product\/9849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/comments?post=9849"}],"version-history":[{"count":2,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product\/9849\/revisions"}],"predecessor-version":[{"id":11556,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product\/9849\/revisions\/11556"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/media\/9854"}],"wp:attachment":[{"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/media?parent=9849"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product_brand?post=9849"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product_cat?post=9849"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/altal.md\/en\/wp-json\/wp\/v2\/product_tag?post=9849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}