Square Steel Tube STEP Files
Square hollow sections by side length and wall thickness. For frame and skid design — weld-joint layout and internal clearance checks.
Free 3D CAD models (STEP AP214). Built to real standard dimensions; threads are simplified (plain shank) per free-library convention.
Standard: KS D 3568
DownloadSQ-20x20x1.2.step
Browse all sizes (59)
□20×20 t1.2□20×20 t1.6□25×25 t1.2□25×25 t1.6□30×30 t1.2□30×30 t1.6□40×40 t1.6□40×40 t2.3□50×50 t1.6□50×50 t2.3□50×50 t3.2□60×60 t1.6□60×60 t2.3□60×60 t3.2□75×75 t1.6□75×75 t2.3□75×75 t3.2□75×75 t4.5□80×80 t2.3□80×80 t3.2□80×80 t4.5□90×90 t2.3□90×90 t3.2□100×100 t2.3□100×100 t3.2□100×100 t4□100×100 t4.5□100×100 t6□100×100 t9□100×100 t12□125×125 t3.2□125×125 t4.5□125×125 t5□125×125 t6□125×125 t9□125×125 t12□150×150 t4.5□150×150 t5□150×150 t6□150×150 t9□175×175 t4.5□175×175 t5□175×175 t6□200×200 t4.5□200×200 t6□200×200 t8□200×200 t9□200×200 t12□250×250 t5□250×250 t6□250×250 t8□250×250 t9□250×250 t12□300×300 t4.5□300×300 t6□300×300 t9□300×300 t12□350×350 t9□350×350 t12
Using these STEP files in CAD
- STEP AP214 format opens directly in SolidWorks, Inventor, Fusion, CATIA, NX, FreeCAD, and most CAD systems.
- Per free-library convention, threads are not modeled (plain shank). These are for layout, clearance, and drawings — not fastening simulation.
- All dimensions use the standard's nominal values. For tolerance-critical use, check the allowances in the spec table.