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Slotted set screw with tip ISO 7434, steel 14H, zinc-plated, blue passivated (A2K)
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Hardness class 14H corresponds to a hardness of 140 HV
Steel set screws are intended for use under compressive stress only (see also DIN EN ISO 898-5). Typical uses include clamping in an adjusting ring or applying pressure to a counterpart. Steel set screws are therefore extremely hard in order to ensure torsional strength in the hexagon socket during tightening/loosening.
Tip:
A2/A4 stainless steel set screws are not specially hardened and may be used for tensile loads.
ISO 7434 replaces DIN 553 | There is some similarity | Nominal diameters for M1, M1.4 removed.
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