M2,5 x 4 mm Zylinderschrauben Innensechskantschrauben A2 Edelstahl - DIN 912
Further details are as follows Thread Length (Excluding the Head) - 4mm. Socket Wrench Size - 2mm. A2 Mixed Sets. Flanged Hex Head Bolts. Flanged XS Hex Head Bolts. Race Flanged Hex Head Bolts. Race Flanged XS Hex Head Bolts.