Nws feem ntau yog siv los txuas cov khoom me me. Nws muaj yias taub hau ntsia hlau, cylindrical taub hau screws, semi-countersunk taub hau screws thiab countersunk taub hau screws. Lub taub hau lub zog ntawm lub taub hau taub hau nts...
bm = 1d ob chav stud feem ntau yog siv rau kev sib txuas ntawm ob qhov txuas steel; bm = 1.25d thiab bm = 1.5d ob chav stud feem ntau yog siv rau kev sib txuas ntawm cov cam khwb cia hlau txuas ...
Raws li lub zog hom kev sib txuas, nws tau muab faib ua qhov zoo tib yam thiab hinged qhov. Raws li cov duab ntawm lub taub hau: hexagonal taub hau, puag ncig lub taub hau, square taub hau, countersunk taub hau thiab hais txog.