JIS B 1181 Hexagon Nuts

Table 8 — Materials for hot forged bolts and screws

The following table is given for guidance only and the grades of steel and the limiting ruling sections listed here are not mandatory. Unless otherwise stipulated, the final choice of the materials used to provide the physical properties given in Appendix A will be left to the manufacturer. (See Clause 2).
When materials selected from this table are used, the mechanical properties referred to above are obtained by oil quenching and tempering at a suitable temperature.

Grade Nominal size of bolt or screwa Material to BS 970b
A and B All sizes Good commercial quality low carbon steel
P Up to and including 2 in EN 5
EN 7
EN 8
S Up to and including ½ in
Up to and including ¾ in
Up to and including ⅞ in
 EN 5C
EN 8
EN 15
Up to and including 1 in EN 12
EN 18
EN 111
Up to and including 2 in EN 16
EN 17
EN 19
EN 24
EN 25
EN 26
EN 100
EN 110
T Up to and including ½ in
 EN 8
EN 15
Up to and including ⅞ in EN 12
Up to and including ⅞ in
Up to and including 1 in 		EN 18
EN 111
T Up to and including 2 in EN 16
EN 17
EN 19
EN 24
EN 25
EN 26
EN 100
EN 110
V Up to and including 3/8 in EN 8
Up to and including 1/2 in EN 15
Up to and including 5/8 in EN 12
Up to and including 3/4 in EN 18
EN 111
Up to and including 7/8 in EN 16
Up to and including 1 1/8 in EN 17
EN 19
EN 100
EN 110
Up to and including 2 in EN 24
EN 25
EN 26
X Up to and including 1/2 in EN 12
Up to and including 5/8 in EN 16
EN 17
EN 18
EN 111
Up to and including 3/4 in EN 100
Up to and including 1 in EN 19
EN 110
Up to and including 1 1/8 in EN 24
Up to and including 2 in EN 25
EN 26

a Limiting ruling section.
b BS 970-1:1983. Mechanical properties relating to steels specified in BS 970-1 are for steels subjected to bulk heat treatment; significantly higher properties will be obtained by heat treatment in the finished component form.