This standard specifies the characteristics of sheet metal spring retainers in corrosion resisting steel, passivated, for use with self-locking barrel nuts EN 4591.
BS EN 4590:2005 Referenced Document
EN 2424 Aerospace series - Marking of aerospace products*, 2008-05-01 Update
EN 2540 Aerospace series - Steel X7CrNiAl17-7 (1.4568) - Air melted - Solution treated and precipitation hardened - Sheet and strip - a ��6 mm - 1 240 MPa ��Rm ��1 450 MPa*, 2018-08-01 Update
ISO 12280 Aerospace - Retainers, spring, sheet metal, for self-locking barrel nuts - Dimensions
ISO 5858 Aerospace - Nuts, self-locking, with maximum operating temperature less than or equal to 425 °C - Procurement specification
ISO 8788 Aerospace — Nuts, metric — Tolerances of form and position*, 2024-04-18 Update
BS EN 4590:2005 history
2006BS EN 4590:2005 Aerospace series - Retainers, spring, sheet metal, for self-locking barrel nuts, in corrosion resisting steel, passivated