Countersunk Screws ISO 10642

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DIN 7991 Dimensions for Hexagon Socket Countersunk Head Screws

ISO 7411

l - length of Bolts
d - the nominal diameter of the thread
t - groove depth
dk - head diameter
s - groove width

Dimensions of Prevailing Torque Type Hexagon Thin Nuts with Non Metallic Insert

d s e dk t
M 1.6 0.9 1.1 3.2 0.6
M 2 1.3 1.5 4 0.75
M 2.5 1.5 1.8 5 0.8
M 3 2 2.3 6 1.2
M 4 2.5 2.9 8 1.8
M 5 3 3.5 10 2.3
M 6 4 4.7 12 2.5
M 8 5 5.8 16 3.5
M 10 6 7 20 4.4
M 12 8 9.4 24 4.6
M 16 10 11.7 30 5.3
M 20 12 13.9 36 5.9

b ATTENTION! Thread length according to manufacturer's choice. Please contact us for further information. Replaced by ISO 10642, from M20 head to DIN 7991

ASTM A193 Grade B7 Fastener Coatings