Can I put my 8x plug in a 4x slot

Dead Plug Allenkey Slot Crome Plated, Size 12inch : plug slot Explanation: Slot weld Plug Weld or slot weld: It is used for attaching flat plates using one or more holes or slots in the top part and then filling wit plug and slot weld Helmet slot plugs set The plug is designed to close off the helmet slot to protect against rain The set contains 3 units General features

plug slot HPE 750W Common Slot Gold Hot Plug Power Supply ; Delivery ▾ ; Payment ▾ ; Pay in installments ▾ ; Warranty and service ▾ ; Power Output: 750 Watts