I presume you've got one of those miniature socket/ratchet/6mm-hex-bit sets on sale everywhere? Mine goes from 3mm to 13mm sockets, with a selection of small tommy bars and a UJ.
Couple of tips for replacing small nuts you can't fit with your fingers...
- Using the appropriate small socket, put a dob of (conductive) grease in the socket, and insert the nut
with a second or even third similar nut behind it to bring the main nut to the nose of the socket, so it isn't recessed. Then screw on.
If sockets tend to fall off extension bars, put a bit of pvc tape round the join.
- A steel nut can also be securely perched on the end of a crosshead screwdriver (larger than the nut hole) by magnetising the screwdriver first. Poke the pair towards the end of the stud, and gently screw on a thread or two to get it on and started.
- A variation on this is to wedge the nut in the end of a bit of tubing, and screw on - gives the option of going round gentle bends, and coping with non-magnetic nuts.
Looking forward to your brisk start!
