If your table clamp knob has ever broken, get this to replace it!  There are two different threads I have found with the table knob clamps out there. So, it is hit or miss.  You can mail the item back if it doesn't fit or just buy both and mail back the one you don't need. You will pay for postage so it's really up to how you handle it.  

Table Clamp Replacement Knob - two types

$7.99Price
Options