Sherardized screws showing even cating on thread. Includes 4 regular screws and three screw eyes

Sherardized screws showing even cating on thread. Includes 4 regular screws and three screw eyes.

Details

Category:
Metallurgy
Object Number:
1913-73 Pt6
type:
screws
credit:
Mr. P.L. Cowper-Coles.