This part of GB/T1406 specifies the types, basic dimensions and inspection methods of pre-focused lamp caps. This standard applies to the design and production of electric light source products that use the lamp caps specified in this part as lamp accessories. The design of other electric light source products can be implemented as a reference.
GB/T 1406.3-2021 Referenced Document
GB/T 1483.3 Gauges for lamp caps and lampholders.Part 3:Gauges for prefocus caps and lampholders
GB/T 1406.3-2021 history
2021GB/T 1406.3-2021 Types and dimensions of lamp caps—Part 3:Prefocus caps
2008GB/T 1406.3-2008 Types and dimensions of lamp caps.Part 3: Prefocus caps
2003GB 1406.3-2003 Types and dimensions of prefocus caps