BS EN 14831:2005 PDF

Scope: This document specifies a test method for fasteners with ISO metric thread from M6 to M16 and with property classes 8.8 to 12.9 for bolts and screws and with property classes 8 to 12 for nuts, to check their tightening performance in the elastic range. It applies to steel fasteners with an ISO metric thread according to ISO 68-1. It applies to fasteners having a friction coefficient from 0,06 up to and including 0,18. For higher values of friction coefficients, the dispersion of test results increases and the test method should not be applied. For lower values friction of coefficients, which are for very specific applications and require special lubrication, this document does not apply. This comparative test method can be used to monitor stability of a production process (such as coating, lubrication, shot-blasting) or to compare various production manufacturing lots. It can also be used to detect fasteners, which are out of specification. NOTE This simplified test method has been developed to avoid systematic use of more complex procedures. In case of dispute the torque/tension test method according to EN ISO 16047 is the referee test. This document does not apply for assessment of fasteners in actual assembly conditions; it does not allow the measurement of operating friction coefficients.

BS EN 14831:2005 Referenced Document

EN 20898-2 Mechanical Properties of Fasteners - Part 2: Nuts with Specified Proof Load Values - Coarse Thread (ISO 898-2 : 1992)
EN ISO 16047 Fasteners - Torque/clamp force testing (ISO 16047:2005/Amd 1:2012)*， 2012-09-15 Update
EN ISO 4759-3 Tolerances for fasteners - Part 3: Washers for bolts@ screws and nuts - Product grades A@ C and F*， 2016-06-01 Update
EN ISO 7093-1 Plain washers - Large series - Part 1: Product grade A (ISO 7093-1:2000)
EN ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread - Technical Corrigendum 1 (ISO 898-1:2013/Cor 1:2013)*， 2013-10-01 Update

2005 BS EN 14831:2005 Fasteners - Tightening performance - Torque/Angle simplified test method