Walnuts should be preferred due to their higher resistance to peeling.
Height: 3.2mm
Package Content: 20 TYPE: HEXAGONAL NUTS FOR THREAD SIZE: M4 X 0.7 FOR SCREWS-Ø: 4.0 MM SELF-LOCKING: NO WRENCH WIDTH: 7MM MATERIAL: A2 STAINLESS STEEL SURFACE: NO IMPROVEMENT RESISTANCE CLASS: NO RESISTANCE CLASS DIN: 934 DIN EN ISO: 4032