BS-EN-4128 Complete Document History
Aerospace series. Bolts, normal hexagonal head, coarse tolerance shank, short thread, in heat resisting nickel base alloy, aluminium IVD coated. Classification: 1 250 MPa (at ambient temperature) / 425 C

Complete Current Edition:
   2016 EDITION - Aerospace series. Bolts, normal hexagonal head, coarse toler - March 31, 2016

Obsolete Revision Information:
   2009 EDITION - THREAD, IN HEAT RESISTING NICKEL BASE ALLOY, ALUMINIUM IVD C - July 31, 2009