Brass Round Slotted Nuts DIN 546 | M3 M4 M5 Metric Brass Round Slotted Nuts DIN 546 – M3, M4 and M5 Brass round slotted nuts to DIN 546, available in M3, M4 and M5 metric coarse threads. The circular body and slotted face allow tightening with... £0.38 (Inc. VAT) £0.32 (Ex. VAT) Choose Options Compare