DIN 6334 Hexagon Connector Nuts

It must be noted there should have been a draft standard for DIN 6334 in 1943, which was never published as a standard and probably fell into disregard during the war. Unfortunately, the withdrawal of this draft can no longer be traced. In various catalogues, however, DIN 6334 is still used today by mistake or as a "sales argument".

No grade marking or torque figures can be specified for this fastener type due to the lack of a formalised standard.

DIN 6334

Hexagon connector or coupling nut


Across Flat Overall
Thickness		 Countersink
Diameter		 Bearing
Diameter		 Across
Corner

s h da dw e

max min max min max min min min
M5 8 7.78 15 14.3


8.92
M6 10 9.78 18 17.3 6.75 6 8.8 11.05
(M7) 11 10.73 21 20.16 7.75 7 9.5 12.12
M8 13 12.73 24 23.16 8.75 8 11.3 14.38
M10 17 16.73 30 29.16 10.8 10 15.3 18.9
M12 19 18.67 36 35.16 13 12 17.2 20.1
(M14) 22 21.67 42 41 15.1 14 20.2 24.49
M16 24 23.67 48 47 17.3 16 22.2 26.75
(M18) 27 26.16 54 53 19.5 18 24.8 29.56
M20 30 29.16 60 59 21.6 20 27.7 32.95
(M22) 32 31 66 65 23.8 22 29.5 35.03
M24 36 35 72 71 25.9 24 33.3 39.55
(M27) 41 40 81 79.73 29.2 27 38 45.2
M30 46 45 90 88.73 32.4 30 42.8 50.85
(M33) 50 49 99 97.73 35.6 33 46.6 55.37
M36 55 53.8 108 106 38.9 36 51.1 60.79