{"$schema":"nativecad-dfm-pack/1","id":"mounts-brackets","title":"Mounts & brackets — VESA, tripod, GoPro, wall, shelf, extrusion","sector":"mounts-brackets","version":"2026-09-04","summary":"Mounting-interface dimensions (VESA, tripod, Arca-Swiss, GoPro), bike clamp diameters, shelf/L-bracket structural rules, wall-anchor and T-slot extrusion fasteners, materials and the load/vibration/drop tests a mount or bracket is held to.","aliases":["vesa","vesa mount","vesa plate","tripod mount","camera mount","gopro mount","phone mount","bike mount","handlebar mount","pole mount","hook bracket","corner brace","angle bracket","arca swiss","shelf bracket","wall mount","tv mount","monitor arm","extrusion bracket"],"crossSector":false,"size":"core","sources":[{"id":"vesa-fdmi","title":"VESA Flat Display Mounting Interface (FDMI) — MIS-D/E/F","url":"https://www.racksolutions.com/news/blog/vesa-mounting-standards-explained/","accessed":"2026-09-04"},{"id":"iso-1222-tripod","title":"ISO 1222 Photography — Tripod Connections","url":"https://naturephotogear.com/tripod-thread-sizes-plate-compatibility-guide/","accessed":"2026-09-04"},{"id":"arca-swiss-usa","title":"Arca-Swiss USA Classic Camera Plate (38mm dovetail)","url":"https://arca-swiss-usa.com/collections/classic-camera-plates/classic-camera-plate","accessed":"2026-09-04"},{"id":"gopro-mount-geometry","title":"GoPro-style 3-Prong Mount Buckle Geometry (parametric reference)","url":"https://www.printables.com/model/93976-parametric-gopro-attachments","accessed":"2026-09-04"},{"id":"bike-diameter-standards","title":"Bike Gremlin Handlebar & Seatpost Diameter Standards","url":"https://bike.bikegremlin.com/3784/bicycle-handlebar-dimension-standards/","accessed":"2026-09-04"},{"id":"tnutz-2020-extrusion","title":"TNUTZ 20-Series T-Slot Extrusion & T-Nut Reference","url":"https://www.tnutz.com/product-category/20-series-6mm-slot/","accessed":"2026-09-04"},{"id":"matweb-6061-t6","title":"MatWeb Aluminum 6061-T6 Datasheet","url":"https://www.matweb.com/search/datasheet.aspx?matguid=1b8c06d0ca7c456694c7777d9e10be5b","accessed":"2026-09-04"},{"id":"astm-a1011","title":"ASTM A1011 Hot-Rolled Steel Sheet","url":"https://www.astm.org/a1011_a1011m-18a.html","accessed":"2026-09-04"},{"id":"drywall-anchor-guide","title":"Drywall Anchor Spacing & Edge Distance Guide","url":"https://maden.co/blogs/fastening-joining/how-close-can-drywall-anchors-be-a-spacing-guide","accessed":"2026-09-04"}],"entries":[{"applies":["vesa","monitor","display","monitor arm"],"tags":["vesa","monitor","dimension"],"id":"vesa-mis-d","kind":"dimension","tier":1,"title":"VESA MIS-D mounting pattern (75x75 / 100x100 mm)","summary":"MIS-D covers monitors and small TVs: a 75x75 mm or 100x100 mm square hole pattern on the display back, tapped M4, engaging 6-10 mm of thread depth without bottoming on internal components.","value":{"min":75,"max":100,"typical":100,"unit":"mm","note":"square pattern, M4 screws"},"basis":"VESA FDMI standard hole-pattern family for small/medium displays","sources":["vesa-fdmi"]},{"applies":["vesa","monitor","ultrawide"],"tags":["vesa","monitor","dimension"],"id":"vesa-mis-e","kind":"dimension","tier":1,"title":"VESA MIS-E mounting pattern (200x100 mm)","summary":"MIS-E covers ultra-wide monitors and small-to-medium TVs: a 200 mm wide x 100 mm tall rectangular hole pattern, tapped M4.","value":{"min":100,"max":200,"unit":"mm","note":"200x100mm rectangle, M4 screws"},"basis":"VESA FDMI standard hole-pattern family for wide displays","sources":["vesa-fdmi"]},{"applies":["vesa","tv","tv mount"],"tags":["vesa","tv","dimension"],"id":"vesa-mis-f","kind":"dimension","tier":1,"title":"VESA MIS-F mounting pattern (200x200 mm and up, M6/M8)","summary":"MIS-F covers larger TVs: a 200 mm-grid square or rectangular pattern from 200x200 mm up to 800x400 mm and beyond, tapped M6 for panels under about 35 kg or M8 for heavier panels.","value":{"min":200,"max":800,"unit":"mm","note":"200mm grid increments; M6 <35kg, M8 heavier"},"basis":"VESA FDMI standard hole-pattern family for large displays","sources":["vesa-fdmi"]},{"applies":["tripod","camera mount","phone mount"],"tags":["tripod","thread","dimension"],"id":"tripod-thread-quarter20","kind":"dimension","tier":1,"title":"1/4-20 UNC tripod thread (small/consumer cameras)","summary":"The small camera/tripod thread is 1/4-20 UNC (0.25 in diameter, 20 threads per inch), used on compact cameras, phone mounts and light accessories up to roughly 2-3 kg unsupported.","value":{"value":0.25,"unit":"in","note":"20 TPI UNC"},"basis":"ISO 1222 / ANSI photographic tripod-connection standard, light-duty thread","sources":["iso-1222-tripod"]},{"applies":["tripod","camera mount","video rig"],"tags":["tripod","thread","dimension"],"id":"tripod-thread-three-eighths16","kind":"dimension","tier":1,"title":"3/8-16 UNC tripod thread (heavier cameras, video)","summary":"The heavy-duty camera/tripod thread is 3/8-16 UNC (0.375 in diameter, 16 threads per inch), used on video tripods, heads and rigs over roughly 2-3 kg, usually paired with a 1/4-20 reducer bushing.","value":{"value":0.375,"unit":"in","note":"16 TPI UNC"},"basis":"ISO 1222 / ANSI photographic tripod-connection standard, heavy-duty thread","sources":["iso-1222-tripod"]},{"applies":["arca swiss","camera mount","tripod mount"],"tags":["arca-swiss","dovetail","dimension"],"id":"arca-swiss-dovetail","kind":"dimension","tier":1,"title":"Arca-Swiss dovetail plate (38 mm, 45 deg)","summary":"The classic Arca-Swiss dovetail plate is 38 mm wide with 45-degree bevelled sides, self-centring and wedging tight as the clamp's screw or lever is tightened.","value":{"value":38,"unit":"mm","note":"45deg bevel each side"},"basis":"Original Arca-Swiss Classic camera-plate dovetail specification","sources":["arca-swiss-usa"]},{"applies":["gopro mount","camera mount","action camera"],"tags":["gopro","mount","dimension"],"id":"gopro-finger-mount","kind":"dimension","tier":1,"title":"GoPro-style 3-finger mount buckle geometry","summary":"The GoPro 3-prong buckle runs about a 3 mm gap between fingers, about 15 mm of finger engagement length, and a roughly 5.1 mm pivot-pin bore clamped by an M5-class thumbscrew; match the gap and bore before mating to third-party accessories.","value":{"table":[{"param":"finger-gap","value":3},{"param":"finger-length","value":15},{"param":"pivot-hole","value":5.1}],"unit":"mm"},"basis":"Published reverse-engineered GoPro buckle dimensions used throughout the parametric-mount design community","sources":["gopro-mount-geometry"]},{"applies":["phone mount","car mount"],"tags":["phone","clamp","dimension"],"id":"phone-clamp-width-range","kind":"dimension","tier":1,"title":"Phone clamp jaw travel range","summary":"A phone mount's spring or screw clamp should open 55-95 mm to cover phones from compact to large phablets/foldables in their cases, with 3-5 mm of extra rubber-pad compression at each end.","value":{"min":55,"max":95,"unit":"mm"},"basis":"Common universal phone-clamp jaw travel range across current mount hardware","sources":["gopro-mount-geometry"]},{"applies":["bike mount","handlebar mount"],"tags":["bike","handlebar","dimension"],"id":"handlebar-clamp-diameters","kind":"dimension","tier":1,"title":"Bicycle handlebar clamp diameters","summary":"Common handlebar clamp diameters are 22.2 mm (flat/riser bar grip area), 25.4 mm (older MTB stem clamp), 31.8 mm (modern oversized standard) and 35 mm (wide-bar performance stems) — match the mount bore to the bar's stated clamp diameter, not its grip-area diameter.","value":{"table":[{"d":22.2},{"d":25.4},{"d":31.8},{"d":35}],"unit":"mm"},"basis":"Bicycle industry handlebar clamp-diameter convention","sources":["bike-diameter-standards"]},{"applies":["bike mount","seatpost mount"],"tags":["bike","seatpost","dimension"],"id":"seatpost-diameters","kind":"dimension","tier":1,"title":"Bicycle seatpost diameters","summary":"Common seatpost diameters are 27.2 mm (road, most compliant), 30.9 mm and 31.6 mm (mountain/gravel, most common with dropper posts); a seatpost-mount clamp or light bracket must match the frame's stated diameter exactly, not round to a neighbouring size.","value":{"table":[{"d":27.2},{"d":30.9},{"d":31.6}],"unit":"mm"},"basis":"Bicycle industry seatpost-diameter convention","sources":["bike-diameter-standards"]},{"applies":["bracket","mount","6061"],"tags":["wall","aluminium","dimension"],"id":"bracket-wall-thickness-6061","kind":"dimension","tier":1,"title":"Bracket wall/arm thickness, 6061-T6 aluminium","summary":"A load-bearing 6061-T6 bracket arm runs 3-6 mm thick for hand-tool-scale consumer mounts (VESA, camera, shelf up to about 5 kg), thickening toward 6-10 mm for TV-class or cantilevered loads; a thinner section should add a rib or gusset rather than relying on material alone.","value":{"min":3,"max":10,"typical":3,"unit":"mm"},"basis":"Common CNC/waterjet bracket gauge for aluminium load paths at consumer-mount scale","sources":["matweb-6061-t6"]},{"applies":["bracket","shelf bracket","steel"],"tags":["wall","steel","dimension"],"id":"bracket-wall-thickness-steel","kind":"dimension","tier":1,"title":"Bracket wall thickness, mild steel","summary":"A load-bearing mild-steel bracket runs 2-4 mm thick (laser-cut/press-brake sheet) for shelf and wall-mount brackets, powder-coated after forming; steel's higher stiffness lets it run thinner than an equivalent aluminium arm for the same deflection.","value":{"min":2,"max":4,"typical":2,"unit":"mm"},"basis":"Common laser-cut/press-brake bracket gauge for mild steel sheet","sources":["astm-a1011"]},{"applies":["shelf bracket","cantilever"],"tags":["shelf","cantilever","rule"],"id":"shelf-bracket-cantilever-rule","kind":"rule","tier":1,"title":"Shelf bracket load vs arm length (cantilever)","summary":"A shelf bracket is a cantilever: stress and tip deflection scale with arm length cubed, so doubling the arm length roughly halves the safe load — keep arm-length-to-thickness under about 15:1 for a solid arm, or add a gusset beyond that.","value":{"max":15,"unit":"ratio","note":"arm length : thickness before a gusset or brace is needed"},"basis":"Cantilever beam bending theory (deflection scales with L^3/t^3): L/t is the practical proxy DFM guides use for when a plain arm needs bracing","sources":["matweb-6061-t6"]},{"applies":["l-bracket mount","angle bracket","corner brace"],"tags":["l-bracket","gusset","rule"],"id":"l-bracket-gusset-rule","kind":"rule","tier":1,"title":"L-bracket inside-corner gusset rule","summary":"Gusset (fill or rib) the inside corner of an L-bracket rather than leaving a sharp 90-degree step: a diagonal gusset or triangular rib spanning at least 30-50% of each leg's length cuts the peak bending stress at the corner by roughly half compared with an ungusseted step.","value":{"min":30,"max":50,"unit":"%","note":"gusset span as a fraction of each leg length"},"basis":"A sharp inside corner is the stress-concentration point on a bent or welded L-bracket under load; a gusset spreads the load path across a longer section","sources":["astm-a1011"]},{"applies":["bracket","mount"],"tags":["fillet","corner","rule"],"id":"inside-corner-fillet-mount","kind":"rule","tier":1,"title":"Inside corner fillet on a machined or printed mount","summary":"Fillet every inside corner of a mount or bracket to at least 0.5-1x the local wall/arm thickness and never leave it sharp: a sharp inside corner is the single most common fatigue-crack start point on a repeatedly loaded bracket.","value":{"min":0.5,"max":1,"unit":"ratio","note":"fillet radius : local thickness"},"basis":"Standard stress-concentration/fatigue-crack-initiation avoidance at re-entrant corners","sources":["matweb-6061-t6"]},{"applies":["wall mount","wall anchor"],"tags":["drywall","anchor","fastener"],"id":"wall-anchor-drywall","kind":"fastener","tier":1,"title":"Drywall wall-anchor sizing for a wall mount","summary":"Into bare drywall use a #8 screw with a 6 mm (1/4 in) expansion or self-drilling plastic plug, rated 15-25 kg per anchor depending on drywall thickness; space anchors at least 150-200 mm apart and keep every anchor hole at least 10 mm from a board edge or another fastener.","value":{"min":15,"max":25,"unit":"kg","note":"#8 screw, 6mm plug, per-anchor rated pullout"},"basis":"Standard plastic drywall-anchor pullout rating and the edge/spacing distance that avoids crushing the gypsum core between anchors","sources":["drywall-anchor-guide"]},{"applies":["extrusion bracket","2020 extrusion","t-slot"],"tags":["extrusion","t-slot","dimension"],"id":"extrusion-2020-tslot","kind":"dimension","tier":1,"title":"2020 aluminium extrusion T-slot (6 mm slot, M5 T-nut)","summary":"A 20x20 mm (2020) T-slot extrusion carries a 6 mm-wide T-slot on each face sized for an M5 drop-in T-nut; a bracket that clamps onto the rail should not exceed roughly 60% of the rail's face width so clamping material remains on either side.","value":{"value":6,"unit":"mm","note":"slot width; M5 T-nut; 20x20mm rail cross-section"},"basis":"Common 20-series T-slot extrusion and T-nut sizing across major suppliers","sources":["tnutz-2020-extrusion"]}]}