I'm making a couple parts for my airsoft stuff, and I need 2 sets of female threads (Like a Nut) that I can use to incorporate into my model. I'm not that experienced at modeling, and I'm using Google Sketch-up (Free). What I need is a female thread, size 14mm x 1.0 CCW. And one in CW. Needs to be 20mm long. So, basically just a threaded tube (threads on the inside) but they have to be 14 mm x 1.0 thread size, and the outside diameter of the tube anywhere between 18 - 20 mm. (O.D. size not critical) And I would need to be able to import it into Google Sketch-up. My import options are: .skp .3ds .dem .ddf .kms .dae Any help here is greatly appreciated.