B4-E-IM4-I Series 4 mm socket adapters with an internal M4 thread for connection to threaded bolts. These socket adapters are made from machined brass with a rigid insulating sleeve. The adapters are designed to accept spring loaded 4 mm diameter plugs which also have a rigid insulating sleeve. The head of the socket adapter is slotted to enable a screwdriver to be used. The insulating sleeves are colour coded to for ease of identification
• Internal M4 thread
• Rigid colour coded insulating sleeve
• Slotted head for screw driver