20-11-2024, 01:03 AM
There was once a steel ring/washer around the hex nut, most of the time these have been lost at some point in the distant past and as Robert mentions the rubbers just compress over them. I find the newly supplied rubber bolt sleeves are a bit of a compromise in size and consequently a difficult fit, silicon grease helps here. The studs should be 3/8" diameter.
Black Art Enthusiast