Angle brackets and corner joints for T-slot framing · Load limits as force and moment, profile line and bolt size, die-cast zinc versus plastic versus extruded aluminium, finish
An aluminium profile corner connector joins two T-slot or modular aluminium profiles at 90°, for example as an angle bracket screwed into the profile grooves with T-slot nuts, so that frames, guards and workstations can be built and changed without welding. Check three things before ordering: the force and moment the joint will carry at your lever arm, the profile line, size and bolt the connector is made for, and its material and finish.
Angle brackets and corner joints that connect T-slot aluminium profiles at right angles, with their screws and slot nuts. T-slot nuts alone, butt and end-face fasteners, hinges, the profiles themselves and welded frames are outside this page; T-slot nuts have their own page.
CNFX editorial research · Sources checked October 11, 2026 · 7 sources
item rates its angle brackets with two conditions that must both be met. Its die-cast zinc Angle Bracket 8 40×40 is given as F < 1,000 N and F × l < 50 Nm, the 80×80 and the 160×80 set as F < 2,000 N and F × l < 150 Nm, and the Angle Bracket Set 5 20×20 as F < 250 N and F × l < 5 Nm. [1][3][4][5] Its plastic (PA) Angle Bracket Set 8 40×40 is rated F < 200 N and F × l < 10 Nm. [6]
The same pages warn that the maximum permissible tensile load on the profile groove must not be exceeded, and item says: “When used to reinforce the joints of large profiles or conduits, several Angle Brackets can be used in parallel.” [1]
Editorial calculation: for a 40×40 zinc bracket carrying a load 100 mm from the joint, F × l < 50 Nm limits F to below 500 N (50 ÷ 0.1), which is tighter than the 1,000 N force limit — roughly 51 kg of static mass at 9.81 m/s². At 40 mm the moment limit allows 1,250 N, so the 1,000 N force limit governs instead. Work out both for your geometry. [1]
Editorial note: these are one maker's ratings for its own brackets, profiles and slot nuts. Ask any supplier for its own force and moment limits, and for how they were determined, rather than transferring these figures.
Give the supplier the profile system and line (or slot width and profile size), connector type and size, load and lever arm at each joint, material and finish, screw and slot-nut type, quantity, and any cap, ESD or cleanroom requirement.
02
Match the profile line, bolt and material
item's 40×40 angle bracket set for Line 8 contains one die-cast zinc bracket, a cap, two ISO 7380 M8×18 button-head screws, two washers and two Line 8 M8 T-slot nuts, and weighs 162 g; the 20×20 set for Line 5 uses DIN 6912 M5×8 screws and M5 slot nuts and weighs 23 g. [1][5] It describes the brackets as giving a power-lock connection between profiles without machining. [1]
Bracket mass rises with size: 119 g for the 40×40 bracket alone, 270 g for the 80×80 and 662 g for the 160×80 set, against 53 g for the plastic 40×40 set. [2][3][4][6] item notes that the plastic version comes with removable anti-torsion features so that attachments without a profile groove can also be screwed on. [6]
A linked supplier lists its aluminium profile corner joint in 6000-series alloy, temper T5–T6, as an extrusion with mill, anodized (8–12 µm), powder-coated (60–100 µm), sandblasted or electrophoretic finishes, and says it is compatible with standard T-slot and modular aluminium systems. [7] Confirm which profile system and slot geometry any connector is built for.
03
An extruded 6000-series corner joint with no published load rating
The listing reviewed offers extruded 6000-series corner joints with mill-finish, anodised, powder-coated, sandblasted or electrophoretic surfaces as part of a wider profile range [7]; it publishes no load rating, so ask for force and moment limits on your profile.
04
Bracket body, screws, slot nuts, washers, cap and finish in one joint set
item sells the bracket as a set, so the screws, washers, slot nuts and cap arrive matched to one profile line: ISO 7380 M8 screws for Line 8, DIN 6912 M5 screws for Line 5. [1][5]
Part
Role
Fix in the order
Bracket body
Carries force and moment; zinc, PA or aluminium. [1][6][7]
Profile line, bracket material, bolt size, force and moment limits and finish for a connector order
The load row needs converting for your frame: item publishes a force limit and a moment limit rather than a capacity in kilograms, so turn each joint's load and lever arm into F and F × l before comparing brackets. [1]
1 company lists this product among what they make. Company figures are quoted from each
company's own website; every card states where the relationship came from.
SinoExtrud (Foshan Yonghang Aluminum Co., Ltd)
Manufacturing site to be confirmed for the order
Lists an aluminium profile corner joint in 6000-series alloy (T5–T6) with mill, anodized, powder-coated and other finishes for T-slot and modular frames.
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
Share this page
Compiled and source-reviewed by the CNFX editorial team.
Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review
· Page last updated 13 October 2026
Buyer questions
How much load can a 40×40 angle bracket carry?
item rates its die-cast zinc Angle Bracket 8 40×40 at F < 1,000 N and F × l < 50 Nm, both to be met. [1]
Do plastic angle brackets carry less load?
item rates its PA 40×40 set at F < 200 N and F × l < 10 Nm. [6]
Do angle brackets need machining of the profile?
item describes its angle brackets as a power-lock connection without machining. [1]
What screws come with a 40×40 angle bracket set?
item's set includes two ISO 7380 M8×18 button-head screws and two Line 8 M8 T-slot nuts. [1]
Sources and what still needs a direct check
Sources checked 2026-10-11. item Industrietechnik is a T-slot profile system maker publishing load conditions, contents and weights for its angle brackets; Sinoextrud is a linked supplier.
