LAMPS & ADAPTORSCRIMPS, SLEEVE & SHRINKTRANSFORMER & DRIVERSTOOLSFIXINGSCONSUMABLESELECTRICALSSPECIALIST REPAIRPOINT OF SALECLEARANCE / REUSE
Available in a selection of sizes, the 3.5mm thread is standard for all electrical metal back boxes. It is sometimes used in conjunction with M3.5 nuts to provide a decorative fixing solution for small signs / plaques.