Bolt Sacrificial Anode

Application

Fastening and corrosion protection of structural elements in mechanical engineering, instrument engineering and other construction industries in combination with nuts and washers of corresponding sizes.

Specification

Material – Carbon steel, stainless steel А2 or А4 with zinc anode embedded in bolt head.

Size - standard with cylindrical head, accuracy class A with minimum thread diameter М12, maximum thread diameter – М36.

Chemical composition

AlloyWeight fraction of main elements, %Weight fractions of impurities, %, maximum:
ZincAluminumIronCopperLeadCadmiumOther
1 Base 0.4-0.6 0.0015 0.001 0.0054 0.070 0.02
2 Base 0.5-0.7 0.004 0.001 0.0054 - 0.02
3 Base 0.2-0.6 0.004 0.001 0.0054 - 0.02

Figure 3.1 – General view

1 – Bolt; 2 – Zinc insert

Figure 3.2 – Overall dimensions

 

Standard sizes

Bolt parametersNominal thread diameter d
М5М6М8М10*М12*M14*M16М18М20М22*М24М27М30М36М42М48
Thread pitch, P coarse 0.8 1 1.25 1.5 1.75 2 2 2.5 2.5 2.5 3 3 3.5 4 4.5 5
fine - - 1 1.25 1.25 1.5 1.5 1.5 1.5 1.5 2 2 2 3 3 3
Width across flats, S 8 10 13 17 19 22 24 27 30 32 36 41 46 55 65 75
Head height, H 3.5 4 5.3 6.4 7.5 8.8 10 12 12.5 14 15 17 18.7 22.5 26 30
Width across corners D, minimum 8.8 11.1 14.4 18.9 21.1 24.5 26.8 30.1 33.5 35.7 40 45.6 51.3 61.3 72.6 83.9
d, minimum 6.9 8.9 11.6 15.6 17.4 20.6 22.5 25.3 28.2 30 33.6 38 42.7 51.1 61 70.5
Threaded length, L 16 18 22 26 30 34 38 42 46 50 54 60 66 78 90 102

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