JIS B 1181 Hexagon Nuts

Table 4A — Comparison of strength grades of BS 1768 and BS 970 (for guidance only)

Grade Tensile strength
BS 1768 BS 970-1:1983
min. min.
tonf/m² N/mm² N/mm²
P 35 541 550 – 700
S 50 772 775 – 925
T 55 849 850 – 1 000
V 65 1 004 1 000 – 1 150
X 75 1 158 1 150 – 1 300