2000NF L22-435:2000 Nuts, hexagonal, plain, reduced height, normal across flats, ISO M or ISO MJ threads 4H5H or 5H tolerance class according to diameter.
1987NF L22-435:1987 HEXAGONAL NUTS. REDUCED HEIGHT. NORMAL ACROSS FLATS. ISO RH THREAD. 4H5H OR 5H TOLERANCE CLASS ACCORDING TO DIAMETER.