2 single-start screws and a 2-start screw

PART OF:
Lead screw correcting lathe and accessories by Armstrong Whitworth and Co

2 single-start screws and a 2-start screw, all probably workpieces; and a short screw and nut, probably a demonstration piece

Details

Category:
Industrial Metrology
Object Number:
1983-62/35
type:
screws