BS A 316:1997

Nuts, hexagonal, slotted (castellated), normal height, normal across flats, with MJ threads, classifications. 600 MPa (at ambient temperature)/120°C, 600 MPa (at ambient temperature)/235°C, 900 MPa (at ambient temperature)/425°C, 1 100 MPa (at ambient temperature)/235°C, 1 100 MPa (at ambient temperature)/315°C, 1 100 MPa (at ambient temperature)/650°C, 1 210 MPa (at ambient temperature)/730°C, 1 250 MPa (at ambient temperature)/235°C and 1 550 MPa (at ambient t…