1. BS ISO 9938. Aerospace. Polytetrafluoroethylene (PTFE) hose assemblies, classification 204 °C/28 000 kPa. Procurement specification. (16th September 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (25 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗