This Clip-on style Captive nut is usually used on sheet metals, where the material is too thin to be threaded. In this case, the nut is clipped on to the casing so it can be screwed into place.
Clip-on Style Nut
No: 8
Fits a Large number of Worcester Boilers
Technical specification
Manufacturer Model No87161482040Brand NameWorcester Bosch