BS EN 1664:1998

Prevailing torque type all-metal hexagon nuts with flange|Nuts, Hexagonal-head fasteners, Internal-thread fasteners, Threaded fasteners, Close-fit threads, Fasteners, Flanged nuts, Torque, Threads, Designations, Dimensions, Dimensional tolerances, Dimensional measurement, Finishes, Steels Click the banner to get it at ONLY: GBP98.00