Four specimens illustrating the manufacture of a 7/8" diam. "Helicoid" Locknut
Four specimens illustrating the manufacture of a 7/8" diam. "Helicoid" Locknut viz: (a) Straight-steel bar 10" long; (b) Piece for nut cut off helix; (c) Piece for nut screwed and punched, hexagon; (d) Piece for nut chamfered and finished
Details
- Category:
- Motive Power
- Object Number:
- 1899-123
- type:
- specimens
- credit:
- Helicoid Locknut Patents (Parent) Co.