Raws li cov qauv tsim, cov qib kev ua tau zoo rau carbon steel thiab alloy steel bolts tau muab faib ua ntau tshaj kaum pawg, suav nrog 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, thiab 12.9. Ntawm cov no, bolts ntawm Qib 8.8 thiab siab dua yog tsim los ntawm qis-carbon alloy steel lossis nruab nrab{11}} carbon steel thiab tau txais kev kho cua sov (quenching thiab tempering); cov no feem ntau hu ua siab - lub zog bolts. Cov qib seem feem ntau hu ua bolts zoo tib yam.
Lub npe rau tus ntsia liaj qhov rooj qhov kev ua tau zoo qib muaj ob tug lej, uas sawv cev rau lub zog tensile nominal thiab qhov sib piv ntawm cov khoom siv ntsia liaj qhov rooj, feem. Stainless hlau bolts tau muab faib ua ntau qib kev ua tau zoo raws li qeb tshwj xeeb ntawm cov hlau siv, suav nrog A1-50, A1-70, A1-80, A2-50, A2-70, A2-80, A3-50, A3-70, A3-80, A4-50, A4-70, A5-5 A5-80, C1-50, C1-70, C1-110, C4-50, C4-70, C3-80, F1-45, thiab F1-60. Hauv cov npe no, thawj tsab ntawv thiab tus lej qhia txog pawg tshwj xeeb ntawm cov hlau tsis muaj steel, thaum tus lej thib ob thiab thib peb sawv cev ib feem kaum ntawm tus nqi tensile zog.