{"id":48464,"date":"2026-06-04T15:11:18","date_gmt":"2026-06-04T13:11:18","guid":{"rendered":"https:\/\/nauticspares.com\/?post_type=product&#038;p=48464"},"modified":"2026-06-04T15:14:51","modified_gmt":"2026-06-04T13:14:51","slug":"nitrider-gas-spring-with-zinc-plated-ball-sockets-500-n-081651","status":"publish","type":"product","link":"https:\/\/nauticspares.com\/en\/product\/nitrider-gas-spring-with-zinc-plated-ball-sockets-500-n-081651\/","title":{"rendered":"Nitrider gas spring with zinc plated ball sockets \u2013 500 N \u2013 081651"},"content":{"rendered":"<h2>Description of the Nitrider gas spring 081651 \u2013 500 N \u2013 Stroke 400 mm<\/h2>\n<p>The <strong>081651 Nitrider\u00ae gas spring<\/strong> is a heavy-duty compression gas strut manufactured by <strong>Associated Spring SPEC UK \/ Barnes Group UK Ltd<\/strong> (Evesham, UK), produced to the specification of <strong>BJ Technologie<\/strong> \u2014 the engineering and components division supplying the Beneteau group of production boatbuilders. It is a direct OEM replacement for the original factory-fitted unit on sailing and motor yachts where this reference was specified at build, and a suitable choice for refit or new-build projects requiring the same force, stroke, and mounting dimensions.<\/p>\n<p>The strut belongs to the <strong>Nitrider\u00ae N10 series<\/strong> from the n-Struts range: a 10 mm rod diameter paired with a 23 mm tube diameter, threaded M8 x 1.25 at each end. The Nitrider\u00ae treatment applies a thermochemical nitriding process to the carbon steel rod surface, producing a hard, wear-resistant black outer layer that significantly extends the operational lifespan of the rod seal interface compared to a standard uncoated carbon steel rod. The tube body receives a black e-coat finish per the GSNI specification, completing the uniform, professional black appearance of the assembly and providing a base level of protection against surface corrosion.<\/p>\n<p>With a <strong>force of 500 N<\/strong> and a generous <strong>stroke of 400 mm<\/strong>, the 081651 is dimensioned for the larger-format mechanisms found on Beneteau-group production yachts: long cockpit locker lids, engine bay access hatches, wide deck panels, or transom storage compartment covers where a shorter-stroke strut would not provide adequate hold-open travel. The body length (L1) is <strong>849 mm<\/strong> and, with both zinc-plated ball sockets fitted, the centre-to-centre length (L2) reaches <strong>909 mm<\/strong> \u2014 an important dimension to check against the existing mounting geometry before ordering.<\/p>\n<p>Both ends are equipped with <strong>EF-BS006Z zinc-plated steel ball sockets<\/strong>: robust cage-type metal fittings with a 30 mm body length, a 10 mm ball seat, and an M8 x 1.25 threaded shank. The zinc plating provides a practical level of corrosion protection for protected interior or semi-exposed locker environments, and the metal construction gives a higher bearing capacity than a plastic socket equivalent \u2014 appropriate for the 500 N force rating of this unit. The sealed cylinder body carries the standard Ressorts SPEC pressure warning label confirming the unit must never be drilled, cut, or exposed to heat.<\/p>\n<p>Distributed in France through <strong>Ressorts SPEC<\/strong>, the authorised partner for Associated Spring \/ Barnes Group components.<\/p>\n<h3>Specifications<\/h3>\n<ul>\n<li><strong>Reference:<\/strong> 081651 \u2013 Rev B<\/li>\n<li><strong>Type:<\/strong> Nitrider\u00ae compression gas spring<\/li>\n<li><strong>Force (P1):<\/strong> 500 N<\/li>\n<li><strong>Stroke:<\/strong> 400 mm<\/li>\n<li><strong>Body length (L1):<\/strong> 849 mm<\/li>\n<li><strong>Centre length with end fittings (L2):<\/strong> 909 mm<\/li>\n<li><strong>Rod diameter (\u00d8R):<\/strong> 10 mm<\/li>\n<li><strong>Tube diameter (\u00d8T):<\/strong> 23 mm<\/li>\n<li><strong>Thread:<\/strong> M8 x 1.25<\/li>\n<li><strong>End fittings (both ends):<\/strong> EF-BS006Z \u2013 zinc-plated steel ball socket, \u00d810 mm ball, M8 x 1.25, 30 mm body length<\/li>\n<li><strong>Rod finish:<\/strong> Nitrided black (GSNI specification)<\/li>\n<li><strong>Body finish:<\/strong> Black e-coat (GSNI specification)<\/li>\n<li><strong>Original customer:<\/strong> Beneteau (BJ Technologie)<\/li>\n<li><strong>Manufacturer:<\/strong> Associated Spring SPEC UK \/ Barnes Group UK Ltd, Evesham<\/li>\n<\/ul>\n<h3>Installation \/ Maintenance<\/h3>\n<h4>Installation:<\/h4>\n<ul>\n<li>Clip the <strong>EF-BS006Z<\/strong> zinc-plated ball sockets onto the 10 mm ball studs at each mounting point. Align the strut axis with the direction of hatch or panel travel to prevent lateral side-loading on the rod seal and end fittings.<\/li>\n<li>Before fitting, confirm the <strong>909 mm centre-to-centre length<\/strong> (with fittings) matches the mounting geometry on the vessel \u2014 always measure the old strut tip-to-tip before removing it.<\/li>\n<li>Where the installation geometry permits, orient the strut with the rod end facing downward to preserve the lubrication film on the rod seal and maximise service life.<\/li>\n<li>The M8 x 1.25 thread and 30 mm socket body provide a robust engagement \u2014 ensure both sockets are fully seated on their respective ball studs before applying load.<\/li>\n<\/ul>\n<h4>Maintenance:<\/h4>\n<ul>\n<li>Inspect the zinc-plated ball sockets periodically for wear, excessive play, or surface corrosion \u2014 particularly after offshore passages or extended lay-up periods in salt-laden air.<\/li>\n<li>Apply a light coat of marine-grade grease or silicone lubricant to the ball joints at each annual service to maintain smooth articulation and extend socket life.<\/li>\n<li>The Nitrider\u00ae rod benefits from an occasional wipe-down with a clean cloth lightly moistened with silicone oil to keep the rod surface clean and the seal lubricated.<\/li>\n<li>The gas strut body is a <strong>sealed, pressurised unit \u2014 never drill, pierce, cut, or heat it<\/strong>. Replace as a complete assembly when force has noticeably diminished or the rod seal begins to weep oil.<\/li>\n<\/ul>\n<div data-class=\"product-pros-cons-section\">\n<h3>Our review<\/h3>\n<div data-class=\"product-pros-cons-wrapper\">\n<div data-class=\"product-pros_cons product-pros\">\n<h4>\u2714\ufe0f Pros :<\/h4>\n<ul data-class=\"pros-cons-list\">\n<li>500 N force rating and 400 mm stroke cover a wide range of heavier hatch and access panel applications aboard production sailing and motor yachts.<\/li>\n<li>Nitrider\u00ae rod treatment delivers superior wear resistance and extended service life compared to standard, untreated carbon steel gas springs of the same size class.<\/li>\n<li>EF-BS006Z zinc-plated steel ball sockets offer a higher bearing capacity than plastic equivalents, appropriate for the 500 N load and 10 mm rod diameter of this unit.<\/li>\n<li>OEM-grade component from Associated Spring \/ Barnes Group, the original equipment supplier to the Beneteau group \u2014 guaranteed dimensional and force accuracy for direct replacement.<\/li>\n<li>Uniform black finish (nitrided rod + e-coat body) integrates neatly into any locker or panel cavity.<\/li>\n<\/ul>\n<\/div>\n<div data-class=\"product-pros_cons product-cons\">\n<h4>\u274c Cons :<\/h4>\n<ul data-class=\"pros-cons-list\">\n<li>Nitrider\u00ae carbon steel construction \u2014 more corrosion-resistant than plain carbon steel but less so than a 316L stainless alternative; best suited to protected interior or semi-sheltered locker environments rather than fully exposed deck applications.<\/li>\n<li>Zinc-plated ball sockets may show surface corrosion over time in permanently damp or salt-spray environments; consider the stainless steel variant (EF-BS006S) for more aggressive conditions.<\/li>\n<li>Fixed force of 500 N \u2014 verify this matches the load and geometry of your specific hatch or panel before ordering.<\/li>\n<li>At 909 mm tip-to-tip, this is a long strut: ensure adequate clearance and travel space in the cavity before purchasing.<\/li>\n<\/ul>\n<\/div>\n<div data-class=\"product-pros_cons product-conclusion\">\n<h3>Conclusion<\/h3>\n<p>The <strong>081651<\/strong> is the correct direct replacement for Beneteau-group yachts and nautical vessels originally fitted with this OEM reference. Its 500 N force, 400 mm stroke, and Nitrider\u00ae surface treatment make it a robust and reliable choice for larger hatches and structural panels in protected interior environments. Before ordering, confirm that your mounting geometry matches the <strong>909 mm centre-to-centre length<\/strong> with both end fittings in place, and verify that 500 N is the correct force for your application. If both criteria are met, this strut provides a straightforward, like-for-like replacement that will restore the full functionality of your onboard mechanism. For installations subject to prolonged saltwater exposure, consider upgrading to a stainless steel gas spring and stainless ball sockets for added longevity.<\/p>\n<\/div>\n<div data-class=\"product-pros_cons product-good-to-know\">\n<h3>Good to Know<\/h3>\n<ul data-class=\"pros-cons-list\">\n<li>OEM reference developed for <strong>Beneteau (BJ Technologie)<\/strong> \u2014 verify fitment against your vessel&#8217;s original equipment documentation or measure the existing strut before ordering.<\/li>\n<li>End fittings: <strong>EF-BS006Z<\/strong> \u2013 zinc-plated steel ball socket, \u00d810 mm ball, M8 x 1.25, 30 mm body length (both ends).<\/li>\n<li>Total centre-to-centre length with fittings: <strong>909 mm<\/strong>. Body length alone (L1): 849 mm. Always measure tip-to-tip on the old strut before purchasing.<\/li>\n<li><strong>Nitrider\u00ae series<\/strong>: rod is nitrided black and body is e-coated black per GSNI specification \u2014 enhanced rod wear resistance vs. standard carbon steel, but not equivalent to stainless steel for aggressive salt environments.<\/li>\n<li>The cylinder body is a <strong>sealed, pressurised unit<\/strong> \u2014 never drill, pierce, cut, or heat it.<\/li>\n<li>Distributed in France by <strong>Ressorts SPEC<\/strong> \u2014 original manufacturer: Associated Spring SPEC UK \/ Barnes Group UK Ltd.<\/li>\n<li>Browse our full range of <a href=\"https:\/\/nauticspares.com\/en\/product-category\/spare-parts\/gas-springs\/\" title=\"Marine gas springs\">marine gas springs<\/a> for other force ratings, stroke lengths, and end fitting options.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>The <strong>081651<\/strong> is a <strong>Nitrider\u00ae gas spring<\/strong> engineered for medium-to-large hatches and structural panels aboard sailing and motor yachts.<\/p>\n<p>Originally specified by <strong>Beneteau (BJ Technologie)<\/strong> for their production vessels, this long-stroke <strong>gas strut<\/strong> is fitted at both ends with <strong>EF-BS006Z zinc-plated steel ball sockets<\/strong> and delivers a push force of <strong>500 N<\/strong> over a stroke of <strong>400 mm<\/strong>, providing reliable, consistent support across a wide range of onboard mechanisms.<\/p>\n<p>With a centre-to-centre length of <strong>909 mm<\/strong> including end fittings, this <strong>marine gas strut<\/strong> is a precision OEM spare part for vessels originally equipped with this reference.<\/p>\n","protected":false},"featured_media":48465,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[1271],"product_cat":[91,93],"product_tag":[1264,1262],"class_list":["post-48464","product","type-product","status-publish","has-post-thumbnail","product_brand-as-raymond","product_cat-gas-springs","product_cat-spare-parts","product_tag-as-raymond-2","product_tag-gas-strut","product_shipping_class-small-2","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/product\/48464","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/comments?post=48464"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/media\/48465"}],"wp:attachment":[{"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/media?parent=48464"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/product_brand?post=48464"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/product_cat?post=48464"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/nauticspares.com\/en\/wp-json\/wp\/v2\/product_tag?post=48464"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}