1. BS 6511:1984 ISO 7806:1983. Specification for Designation of perforations in industrial plate screens

2. BS 6515:1984. Specification for Polyethylene damp-proof courses for masonry

3. BS 6518:1984 EN 50041. Specification for Low voltage switchgear and controlgear for industrial use - Control switches - Position switches 42.5 × 80 - Dimensions and characteristics

4. BS 6520:1984 EN 50047:1981. Specification for Low voltage switchgear and controlgear for industrial use - Control switches - Position switches 30 × 55 - Dimensions and characteristics

5. BS 6527-1:1982 ISO 4572:1981. Hydraulic fluid power filter elements - Part 1: Method of evaluating filtration performance (multi-pass method)

6. BS 6533:1984. Guide to Macroscopic examination of steel by etching with strong mineral acids

7. BS 6556-1:1985. Low speed digital signals for use in coal mines - Part 1: Specification for optical coupling

8. BS 6556-2:1985. Low speed digital signals for use in coal mines - Part 2: Specification for transformer coupling

9. BS 6556-3:1985. Low speed digital signals for use in coal mines - Part 3: Specification for message protocols

10. BS 6564-3:1990. Polytetrafluoroethylene (PTFE) materials and products - Part 3: Specification for E glass fibre filled polytetrafluoroethylene