The European Standard EN has the status of a . ISO (upon which BS EN is based), altering clause 1. Standard [WITHDRAWN] DIN EN Mechanical properties of fasteners; bolts, screws and studs (ISO ); german version EN. Purchase your copy of BS EN , ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British.

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A British Standard does not purport to include all the necessary provisions of a contract. The minimum distance from the thread run-out of the bolt to the contact surface of the nut of the fastening device shall be d. For all property classes, if the 11 hardness is exceeded, a retest shall be conducted at the mid-radius position, one diameter back from the end, at which position the maximum hardness specified shall not be exceeded.

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BS EN 20898-1:1992, ISO 898-1:1988

Figure 10 — Marking of studs The symbols in Table 16 are permissible as an alternative identification of property classes. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by Decemberand conflicting national standards shall be withdrawn at the latest by December Annex A of this part of ISO is for information only.

Skip to main content. Marking is required for hexagon and hexalobular socket head cap screws with nominal diameters d W 5 mm. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. The Vickers hardness measurements are made at the three points shown on Figure 6. The non-notched side of the test piece shall be located near the surface of the bolt.


Screws & Bolts – Mechanical Properties

Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread [2]. The bolt or screw shall meet the requirements for minimum tensile strength, either during wedge tensile testing or in a supplementary tensile test without a wedge, according to the values given for the relevant property class before fracture occurs. Set screws and similar threaded fasteners not under tensile stresses ISO Mechanical properties of fasteners — Part 7: Details and advice can be obtained from the Copyright Manager.

Avenue Marnix 17, B Brussels? The grips of the testing machine should be self-aligning to avoid side thrust on the test piece.

Mechanical properties, screws and studs EN ISO – Nordic Fastening Group AB

Table 14 — Marking symbols Property class 3. Mechanical properties of fasteners made of carbon steel and alloysteel— Part 1: Log In Sign Up. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. For undated references the latest edition of the publication referred to applies. Complete decarburization up to the maximum specified in Table 3 cannot be detected by the hardness measurement method.

The specimen shall be mounted for grinding and polishing in a clamp or, preferably, a plastic mount. Nuts with specified proof load values — Fine pitch thread [5] 7.

For details of these and other benefits contact Membership Administration. Users of British Standards should make sure that they dij the latest amendments or editions.

These data shall not be used as a test requirement. If permission is granted, the terms may include royalty payments or a licensing agreement.

It shall be on the head by indenting or embossing see Figure 9. In the case of small screws or when the shape of the head does not allow the marking as given in Table 14 the clock face marking symbols as given in Table 15 may be used. The application of this standard is restricted to bolts and screws of property class 5.


Endorsement notice The text of ISO Copyright Copyright subsists in all BSI publications. Surface hardness readings taken at HV 0,3 shall be compared with a similar core hardness reading at HV 0,3 in order to make a realistic comparison and determine the relative increase which is permissible up to 30 Vickers points. Bolts, screws and studs ISO Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. Marking is required for bolts and screws with nominal thread diameters d W 5 mm.

For property class By using this site, you agree to the Terms of Use and Privacy Policy. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. The property class symbol consists of two figures: ISO standards by standard number.

For screws threaded to the head, the length of free thread subjected to the load shall be as close as practical to one diameter 1d. B, Mn or Cr 0,20 d 0,55 0, 0, quenched and tempered Alloy steel quenched and temperedg 0,20 0,55 0, 0,