1. Hexagon socket head cap screws. (15th May 1998) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (20 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Hexagon socket screws and wrench keys: metric series. Specification for hexagon socket head cap screws Part 1, (31st July 1981) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗