BS A 327

Nuts, Bihexagonal, Self-Locking, with Counterbore and MJ Threads, Cl.: 1 100 MPa (at Ambient Temp.)/425 Degrees C, 1 100 MPa (at Ambient Temp.)/650 Degrees C, 1 210 MPa (at Ambient Temp.)/425 Degrees C, 1 210 MPa (at Ambient Temp.)/730 Degrees C, 1 550 MPa (at Ambient Temp.)/235 Degrees C, 1 550 MPa (at Ambient Temp.)/425 Degrees C and 1 550 MPa (at Ambient Temp.)/600 Degrees C - Dimensions