Covers bayonet lampholders for use at aoltage not exceesing 250V and loading not exceeding 2A having B22d and B15d designations for use with incandescent lamps as specified in TIS4. Classifies into 2 rypes, i.e. metal and non-metal types. Subclassifies each type into pendant lampholder and bracket lampholder. Specifies sizes, components, material, construction. Includes sampling, testing for performance of components, e.g. plunger depression, cord-grip, dimensions, insulation resistance, high voltage resistance, temperature-rise, voltage drop, tension, corrosion resistance of spring coil, softening point of non-metal type and insulation. Specifies marking.