 | Spanish Normative Institute |
 | French Normative Institute |
 | American Normative Institute |
 | American Normative Institute |
 | German Normative Institute (DIN) |
 | British Standards Institution |
 | European Standards Institute |
 | Belgian Normative Institute |
 | Industrial Fasteners Institute |
 | International Organization for Standardization |
 | Italian Normative Institute |
 | Other institutions |
 | Association of manufacturers |
 | Associations of distributors |
