from The Century Dictionary and Cyclopedia
- n. A nut for a bolt or screw having wings which give a purchase to the thumb in turning it.
Sorry, no etymologies found.
For _chamfer beading_ use in the same manner, and gradually feed the cutter down by means of the adjusting thumb-nut.
The thumb-nut serves to prevent an uncomfortable degree of expansion of the gag.
/, A strap-bolt with a thumb-nut ', having a flat part with holes, by which the bolt is fixed to the side or top surface of any timber, and is mostly used to secure the door or lid of boots. nty A pole-pin, a round iron pin with a flat head, by which the pole is kept in its place.
If any pushing is deemed safe it may be done by placing the index finger back of the thumb-nut on the stylet.] _Anchoring the Foreign Body Against the Tube Mouth_.