ISO 898-2
Jun 15,2018

Standard for Nut

Grade

Hardness

Dimensional style of nut

Nominal nut size

Proof Load Stress                                                    ksi

Head Marking

in.

Non-Zinc coated Nuts

Zinc coated Nuts

ISO 898-2 2009(DIN934)

4

over M16 117-302HV




510MPa

/


6

up to M16 15-302HV,over M16 170-302HV




600-720MPa

/


8

M4 180-302,up to M16 200-302(HRB94-31.5),up to M39 233-353HV




800-920MPa


10

272-353HV




1040-1060MPa


12

272-353HV




1140-1170MPa

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