{"id":13346,"date":"2026-07-30T11:09:27","date_gmt":"2026-07-30T09:09:27","guid":{"rendered":"https:\/\/lubeteam.it\/prodotto\/stauff-flat-u-bolt-clamp-fb-ruk-with-short-plastic-saddle\/"},"modified":"2026-08-07T11:19:59","modified_gmt":"2026-08-07T09:19:59","slug":"stauff-flat-u-bolt-clamp-fb-ruk-with-short-plastic-saddle","status":"publish","type":"product","link":"https:\/\/lubeteam.it\/en\/product\/stauff-flat-u-bolt-clamp-fb-ruk-with-short-plastic-saddle\/","title":{"rendered":"STAUFF Flat U-Bolt Clamp FB\/RUK (with Short Plastic Saddle)"},"content":{"rendered":"<h3>Operating Principle and Applications<\/h3>\n<p>The <strong>STAUFF Flat U-Bolt Clamp FB\/RUK (with Short Plastic Saddle)<\/strong> is a mechanical fastening component specifically designed for exclusive use as a Fixed Point Clamp. Its geometry makes it the ideal solution for the supported or suspended installation of rigid and flexible pipework on beams, standard profiles and structural brackets within complex hydraulic systems. The engineered design features two threaded ends, allowing precise adjustment to the exact outside diameter of the installed pipe, ensuring stable retention and preventing unwanted vibrations or axial movement during system pressure cycles.<\/p>\n<h3>Construction Features and Components<\/h3>\n<p>The complete fastening assembly consists of separate and complementary elements designed to maximise structural strength. The core component is the flat steel U-bolt (Type FB), which encloses the pipe from above. A short plastic saddle (Type RUK) is used to protect the pipe, acting as a cushioning and insulating interface. The base of the system consists of a U-profile compliant with DIN 1026. Final fastening is ensured by two hexagon nuts compliant with DIN EN ISO 4032 and two hexagon head bolts compliant with DIN EN ISO 4014\/4017. The entire assembly is supplied pre-assembled, reducing machine downtime and installation time on site.<\/p>\n<h3>Materials and Surface Treatments<\/h3>\n<p>To meet the demanding specifications required by industrial and marine sectors, the metal components of the STAUFF Flat U-Bolt Clamp FB\/RUK (with Short Plastic Saddle) are available in different material configurations. Code W1 identifies uncoated carbon steel, while variants W32 and W33 indicate zinc-plated and blue-chromated carbon steel, providing increased resistance to environmental corrosion. For highly aggressive environments, the W5 option is available in V4A stainless steel (1.4401\/1.4571 &#8211; equivalent to AISI 316\/316 Ti). The base U-profile is consistently manufactured from uncoated carbon steel. For the protective saddles, standard materials include Polypropylene (code PP, green) and Polyamide (code PA, black), ensuring operational flexibility under different thermal and mechanical conditions.<\/p>\n<h3>Dimensional Specifications<\/h3>\n<p>The dimensional range of this series is extremely broad, covering nominal diameters (DN) from 40 to 500. This corresponds to pipe outside diameters (D1) ranging from 48.3 mm (1-1\/2 inches) up to 521 mm (20.84 inches). The hexagon head bolt sizes also increase according to the clamp diameter, starting from M10 x 40 for smaller sizes (up to DN 65), followed by M12 x 55, M16 x 75 and M20 x 80, up to robust M24 x 100 bolts for diameters of 355.6 mm and above. This proportional sizing ensures that the clamping load and shear resistance are always appropriate for the mass and inertia of the supported pipework.<\/p>\n<h3>Summary Technical Table of the Main Features of the STAUFF Flat U-Bolt Clamp FB\/RUK (with Short Plastic Saddle).<\/h3>\n<div style=\"width: 100%; overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse;\">\n<thead>\n<tr>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Feature<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Type of Use<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Exclusively as a fixed point (Fixed Point Clamps)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Assembly Components<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Flat U-Bolt (FB), Short Plastic Saddle (RUK), U-Profile (DIN 1026), Nuts (DIN EN ISO 4032), Bolts (DIN EN ISO 4014\/4017)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Outside Diameter Range (D1)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">From 48.3 mm to 521 mm (DN 40 &#8211; DN 500)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">U-Bolt Metal Materials<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">W1 (Uncoated Carbon Steel), W32\/W33 (Zinc-Plated Carbon Steel), W5 (V4A Stainless Steel AISI 316\/316 Ti)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Plastic Saddle Materials<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">PP (Polypropylene, Green) \/ PA (Polyamide, Black)<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Fastening Hardware Sizes<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">From M10x40 to M24x100 depending on diameter<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Typical Applications<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">Installation on beams, profiles and brackets (supported or suspended)<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<h3>Product Codes<\/h3>\n<div style=\"width: 100%; overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse;\">\n<thead>\n<tr>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Outside Diameter D1 (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">DN<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Complete Assembly Code (PP\/W1 Example)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">U-Bolt Only Code (W1 Example)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left; background-color: #f2f2f2;\">Saddle Only Code (PP Example)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">48.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">40<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-48.3-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-48.3-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-48.3-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">57<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">50<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-57-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-57-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-57-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">60.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">50<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-60.3-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-60.3-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-60.3-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">76.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">65<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-76.1-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-76.1-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-76.1-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">88.9<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">80<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-88.9-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-88.9-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-88.9-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">108<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-108-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-108-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-108-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">114.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">100<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-114.3-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-114.3-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-114.3-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">133<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-133-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-133-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-133-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">139.7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">125<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-139.7-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-139.7-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-139.7-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">159<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">150<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-159-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-159-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-159-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">168.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">150<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-168.3-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-168.3-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-168.3-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">193.7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">175<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-193.7-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-193.7-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-193.7-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">216<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-216-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-216-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-216-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">219.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">200<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-219.1-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-219.1-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-219.1-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">267<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">250<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-267-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-267-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-267-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">273<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">250<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-273-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-273-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-273-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">318<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">300<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-318-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-318-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-318-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">323.9<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">300<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-323.9-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-323.9-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-323.9-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">355.6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">350<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-355.6-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-355.6-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-355.6-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">368<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">350<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-368-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-368-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-368-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">406.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-406.4-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-406.4-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-406.4-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">419<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">400<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-419-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-419-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-419-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">457<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">450<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-457-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-457-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-457-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">508<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-508-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-508-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-508-PP<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">521<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">500<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB+RUK-521-PP-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">FB-A-521-W1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px;\">RUK-521-PP<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n","protected":false},"excerpt":{"rendered":"<p><span data-path-to-node=\"9,0\">The <b data-path-to-node=\"9,0\" data-index-in-node=\"3\">STAUFF Flat U-Bolt Clamp FB\/RUK (with Short Plastic Saddle)<\/b> is designed exclusively for use as a fixed point in supported or suspended pipe installations on beams, profiles and brackets<\/span><span data-path-to-node=\"9,2\">. Consisting of a flat steel U-bolt (FB), a short plastic saddle (RUK) and a U-profile, it ensures a perfect fit to the pipe outside diameter thanks to its two threaded ends<\/span><span data-path-to-node=\"9,4\">. The available product codes, generated from the main family and the corresponding material and diameter variants, include the following series: FB+RUK-48.3-PP-W1, FB+RUK-57-PP-W1, FB+RUK-60.3-PP-W1, FB+RUK-76.1-PP-W1, FB+RUK-88.9-PP-W1, FB+RUK-108-PP-W1, FB+RUK-114.3-PP-W1, FB+RUK-133-PP-W1, FB+RUK-139.7-PP-W1, FB+RUK-159-PP-W1, FB+RUK-168.3-PP-W1, FB+RUK-193.7-PP-W1, FB+RUK-216-PP-W1, FB+RUK-219.1-PP-W1, FB+RUK-267-PP-W1, FB+RUK-273-PP-W1, FB+RUK-318-PP-W1, FB+RUK-323.9-PP-W1, FB+RUK-355.6-PP-W1, FB+RUK-368-PP-W1, FB+RUK-406.4-PP-W1, FB+RUK-419-PP-W1, FB+RUK-457-PP-W1, FB+RUK-508-PP-W1, FB+RUK-521-PP-W1.<\/span><\/p>\n","protected":false},"featured_media":13092,"template":"","meta":{"_joinchat":[]},"product_brand":[],"product_cat":[101,473],"product_tag":[281],"class_list":{"0":"post-13346","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-clamps","7":"product_cat-flat-and-round-u-bolts-din-3570","8":"product_tag-stauff","10":"first","11":"instock","12":"shipping-taxable","13":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v26.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>STAUFF Flat U-Bolt Clamp FB\/RUK \u2013 LubeTeam Hydraulic<\/title>\n<meta name=\"description\" content=\"STAUFF Flat U-Bolt Clamp FB\/RUK (with Short Plastic Saddle) for fixed-point applications. 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