jack nut (English, noun)
expansion: jack nut (plural jack nuts)
Senses:
topics: engineering
mechanical-engineering
mechanics
natural-sciences
physical-sciences
glosses: A type of nut with a sheet metal body that mushrooms outward, on the far side of the hole through the substrate, when the screw is screwed in, thus providing anchoring with only one-sided access to the hole. It is nearly equivalent to the female portion of a molly bolt.
Forms:
form: jack nuts
tags: plural