2d hook

whitworth thread

3d tool

Screws

3d mechanical part

Worm screw 87.3 mm in diameter

3d barrette

Mechanic piece

structural profiles

2d gears

metric thread

bolt nut

bolt with nut 3d

type a screws

Representation of springs; crossbows

3d bolt

Plans of a piston and a connecting rod of an engine

Views of a support and 3d model

3d bolt and spring

Orthogonal views of a skp piece

Roskas