FreePongratz Trailer square tube plug 30mm x 50mm
Thingiverse
5.607 model
Free
FreeSCOUTcorexy 3D Printer (square aluminum tube frame, scout-tower-like corner nodes, dual-support Z, lots of adjustability to compensate for construction errors)
Thingiverse
FreeTri-Crank w/ 2020 Square Tube
Printables
FreeQIDI Plus5 exhaust duct adapter – 90 mm square to 80 mm tube _ Adaptateur de gaine d’extraction QIDI Plus5 – carré 90 mm vers tube 80 mm
Thingiverse
FreeTowel hook for bathroom radiator with 20mm square tubes
Printables
FreeSquare Tube 3030 Joint
Thingiverse
Free4 way square tube connector
Thingiverse
Free3 way corner square tube connector 2
Thingiverse
Free3 way corner square tube connector
Thingiverse
Free40mm Square Tube Foot with 8mm Tapless Hole
Printables
FreeJoint for 2cm square aluminium tubes
Thingiverse
Free19mm or 3/4 Square Aluminum Tube Corner
Thingiverse
Free3 way corner for 1" square tube
Thingiverse
Free3/4" Square Aluminum Tube Joiner
Thingiverse
Free2 way square tube connector
Thingiverse
Free1" square tube feet or plug
Printables
FreeCamelBak Eddy+ Hook Cap for Square Tube
Printables
FreeEnd cap for square metal tube 1x1
Thingiverse
FreeSquare Aluminum Tube Construction Collection
Thingiverse
/https://fbi.cults3d.com/uploaders/36537743/illustration-file/734034cf-da2f-4124-bd4a-1041154729f0/photo_1.jpg)
$0,56Chair & Table Leg Tube End Caps #02 – Round 16-32 mm & Square 20-30 mm Furniture Glides | Sets of 4 | 9 Sizes
Cults3D
FreeCorner bracket for 20mm aluminum square tube
Thingiverse
Free5 way square tube connector
Thingiverse
Free1 inch square tube corner
Thingiverse
Free2020 Rail or 3/4" Square tube Feet/base
Thingiverse
FreeKossel Modified for standard 1in and 3/4in OD Square Aluminum Tube
Thingiverse
FreeSquare tube corner 12.8 (.5") HK
Thingiverse
FreeUniversal adaptive filament spool (coil) holder (aluminum square tube 608 bearings M8 rod)
Thingiverse
FreeHeadphones hook for desk lamp (10mm square tube)
Printables
Free25mm square tube end cap
Thingiverse
FreeSolstie Complete Guitar Neck With Room For 1/2" Square Steel Tube Truss and Volute Reinforcement (2 pieces)
Thingiverse
Free200mm T5 LED Square Tube Base
Printables
FreeSquare tube expansion plug
Thingiverse
Free20mm Square Tube GoPro Extension
Printables
FreeSquare tube connectors
Thingiverse
Free20mm square tube hook / Haken für 20mm Vierkantrohr
Printables
Free40mm Square Tube plug
Thingiverse
FreeModular high scalable square tube slider
Thingiverse
Free1" Square tube end caps
Thingiverse
/https://fbi.cults3d.com/uploaders/50569585/illustration-file/f50c4745-c25b-49f7-9384-c2941f5e63f9/custom-umbrella-pole-adapter-thumbnail-en-v2.png)
FreeCustom Patio Umbrella Pole Adapter for Square Tube – Parametric STL
Cults3D
Free1 inch square tube
Thingiverse
FreeSpool holder (for 20mm square tube, space saving)
Thingiverse
/https://fbi.cults3d.com/uploaders/50569585/illustration-file/c0d272cc-6545-445a-bc44-40138c5488a4/tube-cap-set-round-square-rectangular-thumbnail-en.png)
FreeRound, Square & Rectangular Tube End Caps – Free STL Set + Custom Size Configurator
Cults3D
FreeSnap-Together Geeetech G2/G2s Layer Fan - Square Fan and Fishtank air tube connector
Thingiverse
FreeSquare tube expansion plug
Thingiverse
/https://fbi.cults3d.com/uploaders/51908085/illustration-file/2d086a03-7110-4cec-9eac-a73e5d55a764/N58-SDG-001_listing-01_v1.0.jpg)
$8,90Metric Square Tube Centering & Drill Guide Kit - 20-60 mm - Replaceable Inserts
Cults3D
/https://fbi.cults3d.com/uploaders/49904767/illustration-file/f12af99b-ca58-40db-bf57-dcc57bdb623e/Screenshot-2026-11-02-at-15.02.30.png)
Free15x25mm or 5/8" by 1" square tube adjustable arm brackets with TESA mount for display
Cults3D
FreeCable clip for 10mm square tube
Printables
FreeCable Clips for IKEA Alex Desk – Fits 30×20mm Square Tube
Printables