DIN EN 20898 1 PDF

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 Standard [WITHDRAWN] DIN EN Mechanical properties of fasteners; bolts, screws and studs (ISO ); german version EN.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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Nuts with specified proof load values — Coarse thread [3]. Where screws are threaded up to the head, the requirements may be considered met even if a crack should appear in the first thread, provided that the head does not snap off. Torsional test and minimum torques for bolts and screws with nominal diameter from 1 mm to 10 mm.

BS EN , ISO – Mechanical properties of fasteners. Bolts, screws and studs

Part 5 defines the mechanical properties for set screws and other fasteners not under tensile stresses. The length of free thread subjected to the load shall be one diameter 1d. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.

For testing of full-size bolts, screws and studs the loads given in Table 6 to Table 9 shall be applied. NOTE 2 The thickness of the test plate should be greater than 2 d. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations.

Compliance with this standard provides one means of conforming with specific essential requirements of the Directive. Nuts with specified proof load values — Coarse thread. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision.


Complete decarburization up to the maximum specified in Table 3 cannot be detected by the hardness measurement method. Gloves or tongs shall be used to minimize measurement error.

Mechanical properties, screws and studs EN ISO 898-1:2013

NOTE Careful differentiation should be made between an increase in hardness caused by carburization and that due to heat-treatment or cold working of the surface. Set screws and similar threaded fasteners with specified hardness classes — Coarse thread and fine pitch thread ISO All properties of Details and advice can be obtained from the Copyright Manager.

The specimens to be used are dkn sections taken through the thread axis approximately half a nominal diameter ” d from the end of the bolt, screw or stud, after all heat-treatment operations have been performed on the product. Torsional EN test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm ISO Fasteners — Surface discontinuities — Part 1: Bolts, screws and studs for special requirements.

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At the time of publication, the editions indicated were valid. Annex ZB normative Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications.

Fasteners, steel products, dn, screws, studs, specifications, materials specifications, mechanical properties, physical properties, tests, mechanical tests, identification methods, designation, marking. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. In the case of bolts or screws with flange, marking shall be on the flange where the manufacturing process does not allow marking on the top of the head.

If marking on the unthreaded part is not possible, marking of property class only on the nut end of the stud is allowed, see Figure Bolts, screws and studs for general requirements.

An increase of more than 30 Vickers points indicates carburization. Principles and basic data. Various BSI electronic information services are also available which give details on all its products and services.

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Avenue Marnix 17, B Brussels? For property classes 8. Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread [2]. There may not be a direct relationship between hardness and theoretical tensile strength. Set screws and similar threaded fasteners not under tensile stresses.

The properties are defined for M1. Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread — Part 2: 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.

Figure 2 — Application of proof load to full-size bolts and screws 8. It shall be on the head by indenting or embossing see Figure 9.

Screws & Bolts – Mechanical Properties

Set screws and similar threaded fasteners not under tensile stresses; — Part 6: Mechanical properties of fasteners made of carbon steel and alloysteel— Part 1: This British Standard, having Amendments issued since publication been prepared under the direction of the Engineering Amd.

If it is not possible to determine the elongation after fracture due to the length of the bolt, the reduction of area after fracture shall be measured providing that Lo is at least 3 do.

If these details are to dn used for any other rin than implementation then the prior written permission of BSI 20889 be obtained. For details of these and other benefits contact Membership Administration. Part 1 does not specify properties for fasteners that have head geometries that reduce the shear strength of the fastener, such as low head screws and countersunk heads.