DIN 7991 ~ISO 10642 010.9 / 10.9 Standardwithdrawn Theheadmarkingis determining BN 20 Hex socket flat countersunk head screws Fastenerstothegivenspecificationhaveareduced fullythreaded loadabilityduetotheheadgeometryaccordingtoISO 898-1. Steel010.9/10.9 Thegeneralchange-overfromDIN7991toISO10642inthe practicerequiresaverificationoftheapplication. black ~UNI5933 M2 M2,5:notincludedinDIN7991 Article d d max. k max. s t L 1 2 1480197 M2 4 1,2 1,3 0,75 90 (4) 1480200 (5) 1480219 (6) 1480227 8 1480235 10 1480243 12 3055515 16 1480251 M2,5 5 1,5 1,5 0,8 90 (5) 1480278 (6) 1480286 8 1480294 10 1480308 12 1480316 16 3055516 20 1750208 M3 6 1,7 2 1,2 90 (5) 1021168 (6) 1021176 8 1021184 10 1021192 12 1021206 (14) 1021214 16 1021222 (18) M2 M2,5:notincludedinDIN7991 Article d d max. k max. s t L 1 2 1021230 M3 6 1,7 2 1,2 90 20 1021249 (22) 1021257 25 1021265 30 3055517 35 3646121 40 1414879 M4 8 2,3 2,5 1,8 90 (6) 1021273 8 1021281 10 1021303 12 1021311 (14) 1021338 16 1021346 (18) 1021354 20 1021362 (22) 1021370 25 1021389 30 1021397 35 1021400 40 1021419 (45) 1021427 50 1021435 M5 10 2,8 3 2,3 90 8 1021443 10 1021451 12 1021478 (14) 1021486 16 1021494 (18) 1021508 20 1021516 (22) 1021524 25 1021532 30 1021540 35 1021559 40 1021567 (45) 1021575 50 1021583 (55) 1021591 60 1021605 M6 12 3,3 4 2,5 90 8 1021613 10 1021621 12 1021648 (14)