1. BS 3928:1969. Method for Sodium flame test for air filters - (Other than for air supply to I.C. engines and compressors)

2. BS 3988:1970. Specification for Wrought aluminium for electrical purposes - Solid conductors for insulated cables

3. BS 4019-3:1993 ISO 3551-1:1992. Rotary core drilling equipment - Part 3: Specification for System A - Metric units

4. BS 4019-4:1993 ISO 3551-2:1992. Rotary core drilling equipment - Part 4: Specification for System A - Inch units

5. BS 4019-5:1999 ISO 10097-1-1999. Rotary core drilling equipment - Specification for wireline diamond drilling equipment - System A. Metric units

6. BS 4089:1999. Specification for Metallic hose assemblies for liquid petroleum gases and liquefied natural gases

7. BS 4293:1983. Specification for Residual current-operated circuit-breakers

8. BS 4364:1993. Specification for Industrial oxygen

9. BS 4366:1993. Specification for Industrial nitrogen

10. BS 4372:1968. Specification for Engineers’ steel measuring rules