{"product_id":"usm-haller-style-connectors","title":"USM Haller Style Connectors – Chrome Ball Joints \u0026 Expansion Tube Connector Kits","description":"\u003cp\u003eThe small parts behind a big idea. These chrome ball connectors and expansion tube connectors are the joints of USM Haller style modular furniture: a ø25 mm ball threaded M8 on six faces, and a ø16 mm connector that locks inside a ø19 mm tube. Order them as spares, or as a complete kit for a side table or nightstand frame.\u003c\/p\u003e\n\n\u003ch2\u003eAbout the USM Haller System\u003c\/h2\u003e\n\u003cp\u003eIn 1963, Swiss engineer Paul Schärer and architect Fritz Haller reduced furniture to three elements: a steel tube, a panel and a small chromed ball. Because the ball is threaded on six faces, a tube can leave it in any direction, so the same joint works at the corner of a single cube or in the middle of a wall of shelving. That one idea made the USM Haller system endlessly reconfigurable and carried it into the permanent collection of the Museum of Modern Art. These connectors follow the same construction principle as the pieces in our USM Haller style family: the ball is the node, and an expansion connector hidden inside each tube end bolts the frame to it. A handful of them is enough to replace a tired joint, extend a frame by another bay, or build a new piece around tubes cut to your own measurements.\u003c\/p\u003e\n\n\u003ch2\u003eMaterials \u0026amp; Craftsmanship\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall connector:\u003c\/strong\u003e a ø25 mm (1\") chrome-plated metal ball, drilled on all six faces and tapped M8 — the node that lets a frame grow in any direction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpansion tube connector:\u003c\/strong\u003e ø16 mm × 30 mm (0.63\" × 1.2\"), made of three parts — a slotted sleeve, a split expanding core and a black M8 hex-socket screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow it holds:\u003c\/strong\u003e the connector slides into the end of a ø19 mm (¾\") round metal tube; as its screw is tightened into the ball, the connector expands against the inside wall of the tube for a rigid joint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHidden hardware:\u003c\/strong\u003e once assembled, the connector sits inside the tube, so only the chrome ball and the tubes remain visible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex key included:\u003c\/strong\u003e every set comes with the hex key used to tighten the screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in Each Set\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Connector 4-Pack:\u003c\/strong\u003e 4 ball connectors — spares, repairs, or the extra nodes needed to extend a frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpansion Connector 3-Pack:\u003c\/strong\u003e 3 expansion tube connectors — spares or replacements for individual tube joints\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide Table Kit:\u003c\/strong\u003e 8 ball connectors + 24 expansion tube connectors — everything that joins one cube frame (8 corners, 12 tubes)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNightstand Kit:\u003c\/strong\u003e 12 ball connectors + 40 expansion tube connectors — everything that joins a two-tier frame (12 corners, 20 tubes)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery set includes a hex key. Tubes, panels and casters are not included.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBall connector\u003c\/th\u003e\n\u003ctd\u003eø25 mm (1\") chrome-plated metal ball, M8 thread on six faces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExpansion tube connector\u003c\/th\u003e\n\u003ctd\u003eø16 mm × 30 mm (0.63\" × 1.2\"), M8 hex-socket screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eø19 mm (¾\") round metal tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread\u003c\/th\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTool\u003c\/th\u003e\n\u003ctd\u003eHex key included with every set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNot included\u003c\/th\u003e\n\u003ctd\u003eTubes, panels, casters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCare \u0026amp; Assembly\u003c\/h2\u003e\n\u003cp\u003eSeat an expansion connector in each tube end, thread it into the ball and square up the frame before tightening with the included hex key — as the photos show, the key can reach a connector's screw through the opposite hole of the ball. Tighten until the joint is firm; snug is enough. Check the joints again after the first few days of use and whenever a piece is moved. Keep the chrome balls bright with a dry microfiber cloth, and avoid abrasive cleaners or scouring pads, which can scratch the plating.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat tube size do these connectors fit?\u003c\/h3\u003e\n\u003cp\u003eThey are made for ø19 mm (¾\") round metal tubing. The connector measures ø16 mm before it expands, so check that the inside diameter of your tube is about 16 mm.\u003c\/p\u003e\n\u003ch3\u003eAre tubes and panels included?\u003c\/h3\u003e\n\u003cp\u003eNo. Each set contains connectors only — ball connectors, expansion tube connectors or both — plus a hex key. Tubes, panels and casters are not part of these sets.\u003c\/p\u003e\n\u003ch3\u003eWhich kit do I need for a side table or a nightstand?\u003c\/h3\u003e\n\u003cp\u003eA single cube frame has 8 corners and 12 tubes, so it takes 8 ball connectors and 24 expansion tube connectors — the Side Table Kit. A two-tier frame has 12 corners and 20 tubes, so it takes 12 ball connectors and 40 expansion tube connectors — the Nightstand Kit.\u003c\/p\u003e\n\u003ch3\u003eWill they work with original USM Haller furniture?\u003c\/h3\u003e\n\u003cp\u003eThese connectors are made for USM Haller style furniture built on ø19 mm tubes and M8 ball joints, such as our own side table and bar cart. They are not manufacturer replacement parts, and thread sizes and tolerances can differ between makers, so measure your existing ball thread and tube before ordering.\u003c\/p\u003e\n\u003ch3\u003eDo I need any tools?\u003c\/h3\u003e\n\u003cp\u003eOnly a hex key, and one is included with every set.\u003c\/p\u003e\n\u003ch3\u003eHow do I keep the chrome looking new?\u003c\/h3\u003e\n\u003cp\u003eDust the balls with a dry microfiber cloth and wipe away fingerprints with a barely damp one, drying straight away — see Care \u0026amp; Assembly above.\u003c\/p\u003e\n\n\u003ch2\u003eExplore the USM Haller Style Family\u003c\/h2\u003e\n\u003cp\u003eThese connectors belong to our USM Haller style family. See the pieces built on the same chromed tubes and ball joints: \u003ca href=\"\/products\/usm-haller-style-side-table\"\u003emobile side table on casters\u003c\/a\u003e, \u003ca href=\"\/products\/usm-haller-style-bar-serving-cart\"\u003ebar \u0026amp; serving cart\u003c\/a\u003e, \u003ca href=\"\/products\/mid-century-modern-vintage-bauhaus-style-usm-haller-nightstand-bedside-table-with-storage-pure-white-black\"\u003enightstand with storage\u003c\/a\u003e and \u003ca href=\"\/products\/usm-haller-tv-stand-bauhaus-style-modern-white-metal-media-console-storage-cabinet-living-room-furniture\"\u003eTV stand media console\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003cp\u003eFree US shipping with door-to-door delivery and 30-day returns — see our \u003ca href=\"\/policies\/shipping-policy\"\u003eshipping policy\u003c\/a\u003e and \u003ca href=\"\/policies\/refund-policy\"\u003ereturn policy\u003c\/a\u003e.\u003c\/p\u003e","brand":"BreuerHome","offers":[{"title":"Ball Connector 4-Pack","offer_id":67648212959554,"sku":"UCN-B25-4PK","price":72.0,"currency_code":"USD","in_stock":true},{"title":"Expansion Connector 3-Pack","offer_id":67648212992322,"sku":"UCN-E16-3PK","price":58.0,"currency_code":"USD","in_stock":true},{"title":"Side Table Kit (8 Balls + 24 Connectors)","offer_id":67648213025090,"sku":"UCN-KIT-ST","price":101.8,"currency_code":"USD","in_stock":true},{"title":"Nightstand Kit (12 Balls + 40 Connectors)","offer_id":67648213057858,"sku":"UCN-KIT-NS","price":182.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/6477\/5234\/files\/usm-haller-style-ball-connector-25mm-chrome.jpg?v=1791167285","url":"https:\/\/breuerhome.com\/products\/usm-haller-style-connectors","provider":"BREUER HOME","version":"1.0","type":"link"}