Type Dimension(mm) d s r a≈ d H PM31005V 10 4.5 0.5 2.4 4.2 14.5 PM31310V 13 5.5 1 3.4 5.2 18.5 PM31320V 13 5.5 2 3.4 5.2 17.5 PM31605V 16 7 0.5 4.4 6.2 23.5 PM31620V 16 7 2 4.4 6.2 22 PM31910V 19 8.5 1 5.4 7.2 27.5 PM31920V 19 8.5 2 5.4 7.2 26.5