EXTENSION TUBE, NAME EXTENSION TUBE ADDITIONAL REQUIREMENTS SEE NOTE COMMERCIAL REFERENCE BGL-TE 1/4BSP 01 NOTE: – THREAD 1/4X19F BSP; – 13 MM TUBE EXTERNAL DIAMETER; – TOTAL LENGTH OF 442 MM; – 18 MM THREAD LENGTH; – NIPPLE THREAD 1/4” BSP; – HEXAGONAL MEASUREMENT: 25.4 MM; – USEFUL TUBE LENGTH: 382 MM; – MAXIMUM WORKING PRESSURE OF 320 MPA.