Five screws

Made:
1920-1929
maker:
Sherard Osborn Cowper-Coles
Five screws, 37 mm long

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Five screws, 37 mm long
Science Museum Group
© The Board of Trustees of the Science Museum

Five screws, 37 mm long, sherardized by Cowper Coles in the 1920s using a mixture of half and half Zn dust and pumice, plus 1% resin.

Details

Category:
Metallurgy
Object Number:
2002-160
Materials:
metal (unknown)
Measurements:
: 1.4567 in.; 37 mm
type:
five sherardized screws.
credit:
Mr. Peter Cowper-Coles.