EN 1661/14218 hexagonal nut with collar is a nut with a wide flange at one end that acts as an integral washer. This serves to distribute the pressure of the nut over the part being fastened, reducing the possibility of damage to the part and making it less likely to loosen due to uneven tightening surfaces. These large flange nut are mostly hexagonal in shape and are made of hardened steel, usually plated with zinc.
 
EN 1661/EN14218 Large Hex Flange Nut Specifications
DIN EN 1661 Flange Nuts
EN 1661 - 1998 Hexagon Nuts With Flange
Equivalent norm: GB/T 6177.1, ISO 4161, ANSI/ASME B18.2.4.4M, NF E 25-406
 
EN 1661 Hot Dipped Galvanized Flange Nut Dimensions
Legend Making
P=pitch Carbon Steel:6,8,10,12
K=height of the nut Thread:6H
D=the nominal diameter of the thread Surface:BLK,ZP,HDG,etc
E=The length of the diagonal
S=The length of the flat
 
EN 14218 Flange Nuts
EN 14218 - 2003 Hexagon Head Nuts With Flange With Fine Pitch Thread
 
EN 14218 Hot Dipped Galvanized Flange Nut Dimensions
Legend Making
P=pitch Carbon Steel:6,8,10,12
K=height of the nut Thread:6H
D=the nominal diameter of the thread Surface:BLK,ZP,HDG,etc
E=The length of the diagonal
S=The length of the flat
 
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