The following table is for guidance only; grades of steel shown and ruling sections are not mandatory. The finished products shall satisfy the requirements for physical properties set out in Clause 4 and Table 4 of Appendix A.
| Grade | Nominal size of bolt or screwa | Materialb | |
|---|---|---|---|
| A and B | All sizes |
Good commercial quality low carbon steel |
|
| P | Up to and including 1 in |
BS 970 — EN 2, A to D BS 970 — EN 5 BS 3111 — Type 0 BS 3111 — Type 1 BS 3111 — Type 9 |
|
| S | Up to and including 7/8 in Up to and including 1 in |
BS 3111 — Type 1 BS 3111 — Type 2 BS 3111 — Type 3 BS 3111 — Type 9 BS 3111 — Type 10 |
|
| T |
Up to and including 1/2 Up to and including 1 in |
BS 3111 — Type 1 BS 3111 — Type 2 BS 3111 — Type 3 BS 3111 — Type 9 BS 3111 — Type 10 |
|
| V | Up to and including 3/8 in |
BS 3111 — Type 1 |
|
| Up to and including 3/4 in |
BS 3111 — Type 2 BS 3111 — Type 3 BS 3111 — Type 9 |
||
| Up to and including 1 in |
BS 3111 — Type 5 BS 3111 — Type 7 BS 3111 — Type 10 |
||
| X | Up to and including 3/8 in | BS 3111 — Type 2 | |
| Up to and including 5/8 in | BS 3111 — Type 3 |
||
| Up to and including 3/4 in |
BS 3111 — Type 5 BS 3111 — Type 7 BS 3111 — Type 10 |
||
|
a Limiting ruling section. |
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