Small brass screw embedded in a knob made of phenol formaldehyde

Made:
1920-1940
Small brass screw embedded in a knob made of phenol

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Small brass screw embedded in a knob made of phenol
Science Museum Group
© The Board of Trustees of the Science Museum

Small brass screw embedded in a knob made of phenol formaldehyde, 1920-1940

Details

Category:
Plastics and Modern Materials
Object Number:
2005-326
Materials:
phenol formaldehyde (unspecified) and brass (copper, zinc alloy)
Measurements:
: 1.1811 x .9843 in.; 30 x 25 mm
type:
screw fitting
credit:
Frangenberg, Tomas