Terry's patent 1908 (no.11804) coil friction type locknut
1908
D. Halpin's patent
1879
Bevan's patent 1908 Locknut
1908
Mellor's patent lock nut and bolt
Two Vislok Patent Safety Lock Nuts
Vibro Lock Nuts
Turret lock-nut
Bevan's patent 1908 Locknut
1908
Bevan's patent 1908 Lock-nut, double roller type, for 1" diam. bolt
"Otter" Lock-nut for 1" diam. bolt
1921