Terms for subject Chemistry containing threads

English	Spanish
screw with constant depth of thread	husillo con profundidad de filete constante
screw with decreasing depth of thread	husillo con profundidad de filete decreciente
single-thread	rosca sencilla
single-thread	husillo de una entrada
single-thread	filete sencillo
thread-forming insert	anillo roscado interiormente para moldear roscas externas