This standard covers a range of rectangular connectors with round contacts. The contacts are removable and have closed barrel crimp terminations. Connector polarization is achieved with polarized guides, or polarized jackscrews, or a combination of guides and jackscrews with a rectangular-shaped metal shell. Applications for this range of connectors include uses in telecommunications and data processing equipment and other electronic devices employing similar techniques. This standard shall be used in conjunction with the following IEC publications: Publications Nos. 50(581) (1978): 352-2 (1990): 512-1 (1984): International Electrotechnical Vocabulary (IEV), Chapter 581: Electrotechnical components for electronic equipment. Solderless Connections, Part 2: Solderless crimped connections - General requirements, test methods and practical guidance. Electromechanical components for electronic equipment; basic testing procedures and measuring methods, Part 1: General. 512-2 (1985): 512-3 (1976): 512-4 (1976): 512-5 (1977): Part 2: General examination, electrical continuity and contact resistance tests, insulation tests and voltage stress tests. Part 3: Current-carrying capacity tests. Part 4: Dynamic stress tests. Part 5: Impact tests (free components), static load tests (fixed components), endurance tests and overload tests. Part 6: Climatic tests and soldering tests. Part 7: Mechanical operating tests and sealing tests. Part 8: Connector tests (mechanical) and mechanical tests on contacts and terminations. Part 9: Cable-clamping tests, explosion hazard tests, chemical resistance tests, fire hazard tests, r.f. resistance tests, capacitance tests, shielding and filtering tests and magnetic interference tests. 512-6 (1984): 512-7 (1988): 512-8 (1984): 512-9 (1977): 807-1 (1985): Rectangular connectors for frequencies below 3 MHz, Part 1: General requirements and guide for the preparation of detail specifications.