BS EN 3721:1995 Nuts, bihexagonal, self-locking, deep counterbored, in heat resisting steel, FE-PA92HT (A 286), MoS2 coated. Classification: 1100 MPa (at ambient temperature)/425°C
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This standard specifies the characteristics of self-locking bihexagonal nuts with deep counterbore, in
FE-PA92HT, MoS₂ coated, for aerospace applications.
Classification : 1 100 MPa 1) / 425 °C 2)