Internal and external metric series circlips of carbon steel. Material, heat treatment, hardness, manufacture, dimensions and tolerances, finish and testing.Cross References:BS 891:Part 1BS 891:Part 2BS 1133:Section 6BS 1449:Part 1BS 1706BS 3189BS 4500:Part 1Replaces the requirements for metric series in BS 3673-1:1968.