Four specimens illustrating the manufacture of a 7/8" diam. "Helicoid" Locknut

Four specimens illustrating the manufacture of a 7/8 diam

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Four specimens illustrating the manufacture of a 7/8 diam
Science Museum Group
© The Board of Trustees of the Science Museum

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.