Glass packaging. Screw finishes. Depressed threads Ingestion-build-64721 Chilled-iron grit abrasives are used

Chilled-iron grit abrasives are used in both static and site blasting equipment

(Which gives terms and definitions) and you may also be interested in BS 8887-1 which is aimed at the design stage

BS 3641-3 specifies basic designs for symbols intended for use on machine tools

7 Maintenance instructions

Winches manufacturers and installers

Glass packaging. Screw finishes. Depressed threads Ingestion-build-64721 Chilled-iron grit abrasives are used1 Scope This European Standard specifies the profiles of thread for all the screw neck finishes for metallic, plastic and metallo plastic closures. The depressed threads could be used on continuous thread finishes to reduce the thread depth at and adjacent to the mould parting line. Depressed threads are only used on 28 mm Roll On Pilferproof (ROPP) type finishes where the closure is formed on the neck finish.