Lub elastic cylindrical tus pin, los yog lub caij nplooj ntoos hlav tus pin, yog ib tug headless hollow kem nrog ib tug axial qhov thiab ib tug chamfer ntawm ob hnub, uas yog siv rau positioning, txuas thiab kho ntawm qhov chaw.Nws yog ib qho tsim nyog kom muaj qhov zoo elasticity thiab shear tsis kam, thiab sab nraud ntawm tus pin no yog me ntsis loj dua qhov sib dhos aperture.