BS Mechanical properties of fasteners Specification for bolts, screws and studs. Mechanical properties of fasteners Specification for nuts with specified proof load values. Mechanical properties of fasteners Specification for set screws and similar threaded fasteners not under tensile stresses. BS , ISO Specification for corrosion-resistant stainless steel fasteners.
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British Standard. This is an uncontrolled copy. Ensure use of the most current version of this standard by searching British Standards Online at bsonline. Specification for. Holding down bolts. BS Committees responsible for this British Standard. British Constructional Steelwork Association Ltd. British Industrial Fasteners Federation.
The following body was also represented in the drafting of the standard, through subcommittees and panels:. This British Standard, having been prepared under the direction of the General Mechanical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 29 March The following BSI references relate to the work on this standard:.
ISBN 0 5. Steel Construction Institute. Amendments issued since publication. Committees responsible Foreword. Page Inside front cover ii. Figure 1 — Dimensions of square head bolts Figure 2 — Dimensions of hexagon head bolts. Table 1 — Dimensions of square head bolts Table 2 — Dimensions of hexagon head bolts Table 3 — Tolerance on nominal length Table 4 — Preferred sizes Table 5 — Characteristics. Publication s referred to. Inside back cover.
This British Standard has been prepared under the authority of the General Mechanical Engineering Standards Policy Committee to provide a metric series standard for holding down bolts.
A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover.
This standard has been updated see copyright date and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.
This British Standard specifies the general dimensions, tolerances, materials and mechanical properties for holding down bolts of product grade C for use in connecting steel structures to their foundations and in similar applications. Bolts with square heads and square necks are specified. Two possible forms of square neck are covered. Bolts with hexagon heads are also specified. Other forms of holding down bolts are not covered.
NOTE The titles of the publications referred to in this standard are listed on the inside back cover. The general dimensions and tolerances of holding down bolts with square heads and square necks shall be as given in Table 1 and Table 3, and Figure 1. The dimensions and tolerances of holding down bolts with hexagon heads shall be as given in Table 2 and Table 3, and Figure 2.
NOTE 1. NOTE 2. The symbol v is the dimension across flats of the underhead square neck. Preferred sizes for square and hexagon head holding. Symbols and descriptions of dimensions may be found. Table 1 — Dimensions of square head bolts.
Thread d. P pitch. Dimensions are in millimetres. Figure 1 — Dimensions of square head bolts. Table 2 — Dimensions of hexagon head bolts. Table 3 — Tolerance on nominal length l. Nominal length. Table 4 — Preferred sizes. Nominal length l for thread d :. When designating for the purpose of an enquiry or. Holding down. Square square, or Hexagon;. ISO metric;.
BS ;. Square head holding down bolts 20 mm in diameter, mm long, strength grade 4. Materials, tolerances, mechanical properties and associated nuts for holding down bolts shall be as given in Table 5. M20 , 4. Hexagon head pre-loaded holding down bolts 24 mm in diameter, mm long, strength grade 8. M24 , 8. Table 5 — Characteristics. Thread tolerance.
Mechanical property class a. Tolerance for product grade C. See BS For acceptance procedure, see BS Associated nuts b. See BS or BS BS , Specification for hot dip galvanized coatings on iron and steel articles. BS , Method for specifying electroplated coatings of zinc and cadmium on iron and steel. BS , ISO metric screw threads. BS , Principles and basic data.
BS , Specification for selected limits of size. Metric units. BS , Specification for high strength friction grip bolts and associated nuts and washers for structural engineering. BS , General grade. BS , Specification for sherardized coatings on iron or steel. BS , Mechanical properties of fasteners. BS , Specification for bolts, screws and studs. BS , Tolerances for fasteners. BS , Specification for tolerances for bolts, screws and nuts with thread diameters U 1.
BS , Method for dimensioning and designating bolts, screws, studs and nuts. BS , Method of acceptance inspection for fasteners. BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level.
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Holding Down Bolts BS 7419 (Square Square) Grade 4.6 & 8.8
Bolts, screws and studs with nominal dimeters up to and including 39 mm of any triangular ISO thread and made of carbon steel or alloy steel. Not applicable to set screws and similar threaded fasteners. Multi-user access to over 3, medical device standards, regulations, expert commentaries and other documents. Worldwide Standards We can source any standard from anywhere in the world. Learn more about the cookies we use and how to change your settings. Online Tools.