Metric countersunk head machine screws - Slotted DIN 963 BS 4183 ISO 2009 Materials/Finishes: Steel 4.8/Zinc & clear Stainless steel/Self colour Brass/Self colour Dimensions Thread (d) M2 M2.5 M3 M3.5 M4 M5 M6 M8 H max (BS/DIN) 1.2 1.5 1.65 1.93 2.2 2.5 3 4 H max (ISO) 1.2 1.6 1.65 2.35 2.7 2.7 3.3 4.65 D nom (DIN) 3.8 4.7 5.6 6.5 7.5 9.2 11 14.5 D nom (BS) 4.4 5.5 6.3 7.35 8.4 10 12 16 D nom (ISO) 3.8 4.7 5.6 7.3 8.4 9.3 11.3 15.8 w (slot width) nom 0.6 0.7 0.9 1 1.3 1.3 1.7 2 t (slot depth) min 0.8 1 1.2 1.4 1.6 2 2.4 3.2 NB: Generally our preferred stock is to DIN - if dimensions are critical to your application you should check with us prior to ordering. Preferred lengths Thread (d) Length (L) M2 M2.5 M3 M3.5 M4 M5 M6 M8 5 ST ST ST 6 ST ST ST BR ST BR 8 ST ST ST BR ST BR ST 10 ST ST ST BR ST BR ST BR ST 12 ST ST ST BR ST BR ST BR ST BR ST 16 ST ST BR ST BR ST BR ST BR ST 20 ST ST BR ST BR ST BR ST BR ST 25 ST BR ST BR ST BR ST BR ST 30 BR ST BR ST BR ST BR ST 4 35 ST ST BR ST 40 ST ST BR ST 45 ST 50 ST 60 ST 65 ST 70 ST ST - Steel, Zinc & clear - other finishes often available BR - Brass, Self colour