Mae meintiau cyffredin o gnau yn cynnwys: M2.5, M3, M4, M5, M6, M8, M10, M12, M14 ac M36.
M2.5 nut: diamedr 5mm
M3 nut: diamedr 5.5mm
M4 nut: diamedr 7mm
M5 nut: diamedr 8mm
M6 nut: diamedr 10mm
M8 nut: diamedr 13mm
M10 nut: diamedr 17mm
M12 Nut: diamedr 19mm
M14 Nut: diamedr 22mm
M36 Nut: diamedr 55mm
