Click to expand Tap to zoom PN16 Screwed Flexible Connector BS21 NBR by Albion Valves (UK) Ltd SKU AFLE410050 Flexible Connector NBR 16 Bar Rated PN16 Screwed Flexible Connector. NBR Body. BSP Taper BS21 (ISO 7/1) or NPT (ANSI B1.20.1) NPT valves are subject to factory lead time. Screwed BSP Taper (ISO 7/1) or NPT (ANSI B1.20.1) 16 Bar Rated -20°C to +80°C ART-410-rev1.pdf (albionvalvesuk.com) Accessories