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PCE
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IPC Subgroup
B21H 3/02

external screw-threads

Introduced: September 1968

Last revised: January 2006

Full Title

Making helical bodies or bodies having parts of helical shape > external screw-threads

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Subclass:
MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS

Related Keywords

making NUT(S) by rollingTHREADING metal by rolling

2 direct subcodes

Child Classifications

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  • B21H 3/04 Making by means of profiled rolls
  • B21H 3/06 Making by means of profiled members other than rolls, e.g. jaws, moved longitudinally or curvilinearly with respect to each other