Coatings on metal fasteners - Specification for mechanically applied zinc and zinc based coatings PAS 15 BS EN 4421 on studs

BS EN 4421 on studs is useful for:

except where otherwise indicated

Manufacturers of vehicular components

ISO 11173 is also useful for transport companies related to oil and gas

covered by this standard

Coatings on metal fasteners - Specification for mechanically applied zinc and zinc based coatings PAS 15 BS EN 4421 on studs1 Scope This part of BS 7371 specifies requirements for coatings applied by mechanically impacting zinc powder, or zinc based powder on to the component surface in an aqueous medium. The coating is not applied by using impact media accelerated by compressed air or centrifuge methods. The coatings consist principally of zinc and can be lubricated to give controlled torque clamping force properties when required. NOTE 1 See, for example, BS 73712. In