Bayliss's patent 1887. "Eureka" lockfast nut and bolt example 3/4" diam
Bayliss's patent 1887. "Eureka" lockfast nut. (i.e nib caulked into bolt) and bolt example 3/4" diam.
Bayliss's patent 1887. "Eureka" lockfast nut. (i.e nib caulked into bolt) and bolt example 3/4" diam.