1. BS 4568-1:1970. Specification for Steel conduit and fittings with metric threads of ISO form for electrical installations - Part 1: Steel conduit, bends and couplers

2. BS 4579-2:1973. Specification for The performance of mechanical and compression joints in electric cable and wire connectors - Part 2: Compression joints in nickel, iron and plated conductors

3. BS 4591:1990 ISO 918:1983. Method for Determination of distillation characteristics of organic liquids (other than petroleum products)

4. BS 4603:1970. Method for Determination of residue on ignition or ash of chemical products

5. BS 4604-1:1970. Specification for The use of high strength friction grip bolts in structural steelwork metric series - Part 1: General grade

6. BS 4604-2:1970. Specification for The use of high strength friction grip bolts in structural steelwork metric series - Part 2: Higher grade (parallel shank)

7. BS 4607-2:1970. Specification for Non-metallic conduits and fittings for electrical installations - Part 2: Rigid PVC conduits and conduit fittings. Imperial Units

8. BS 4607-3:1971. Specification for Non-metallic conduits and fittings for electrical installations - Part 3: Pliable corrugated, plain and reinforced conduits of self-extinguishing plastics material

9. BS 4607-5:1982 + A3:2010. Non-metallic conduit fittings for electrical installations - Part 5: Specification for rigid conduits, fittings and boxes of insulating material

10. BS 4677:1984. Specification for Arc welding of austenitic stainless steel pipework for carrying fluids