O RINGS METRIC

BS 4518 30 X SIZES (PEG REF):3 X 2 (006), 4 X 2 (007), 5 X 2 (008), 6 X 2 (009), 7 X 2 (010), 8 X 2 (011), 10 X 2 (012), 10 X 2.5 (110), 11 X 2.5...