BS 4933:2010
$142.49
Specification for ISO metric black cup and countersunk head bolts and screws with hexagon nuts
| Published By | Publication Date | Number of Pages |
| BSI | 2010 | 24 |
This British Standard specifies requirements and provides general dimensions and tolerances for the following types of cup head and countersunk head bolts and screws:
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cup head bolts and screws;
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cup head bolts with nibs;
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cup head square neck bolts;
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90° countersunk head bolts and screws;
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90° countersunk head bolts with nibs;
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90° countersunk head square neck bolts;
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120° countersunk head square neck bolts.
Mechanical properties for steel bolts and screws are specified in BS EN ISO 898‑1.
This British Standard also specifies requirements for the nuts to be provided with bolts and screws conforming to this standard.
NOTE 1 A table summarizing the key requirements of BS 4933 is included in Annex A. This table does not list every requirement in BS 4933 but is just intended as a quick reference for users.
NOTE 2 It is considered that the range of nominal sizes included in this standard is adequate for most of the applications for which this series is likely to be employed, but for the convenience of users requiring larger sizes, further information is provided in Annex B.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Foreword |
| 5 | 1 Scope 2 Normative references |
| 6 | 3 Manufacture and property classes of steel bolts and screws 4 Mechanical properties of steel bolts and screws 5 General dimensions and tolerances |
| 7 | 6 Length of bolts and screws 7 Ends of bolts and screws 8 Screw threads Table 1 Tolerances on nominal lengths Dimensions in millimetres |
| 8 | Table 2A Thread lengths for all bolts except cup head square neck bolts Table 2B Thread lengths for cup head square neck bolts |
| 9 | 9 Nuts 10 Finish Table 3 Thread run-out (bolts) and underhead distance (screws) Dimensions in millimetres Table 4 Recommended bolt and nut combinations |
| 10 | 11 Marking and identification of bolts and screws 12 Inspection and testing Figure 1 Example of marking of cup head bolts and screws Figure 2 Example of marking of countersunk head bolts and screws |
| 11 | 13 Complete designation for the purpose of an enquiry or order |
| 12 | Table 5 �Cup head bolts and screws Dimensions in millimetres |
| 13 | Table 6 �Cup head bolts with nibs Dimensions in millimetres |
| 14 | Table 7 �Cup head square neck bolts Dimensions in millimetres |
| 15 | Table 8 �90° countersunk head bolts and screws Dimensions in millimetres |
| 16 | Table 9 �90° countersunk head bolts with nibs Dimensions in millimetres |
| 17 | Table 10 �90° countersunk head square neck bolts Dimensions in millimetres |
| 18 | Table 11 �120° countersunk head square neck bolts Dimensions in millimetres |
| 19 | Annex A (informative) Summary of requirements Table A.1 Summary of requirements for bolts, screws and nuts |
| 20 | Annex B (informative) Formulae for basic dimensions of products greater than 24 mm diameter Table B.1 �Formulae for basic dimensions of products greater than 24 mm diameter Dimensions in millimetres |
| 22 | Bibliography |
