'Nut, LET-LOK(TM), Tube Size 6mm, Tube Connection, Material of Construction 316 Stainless Steel, Pressure 4100 To 10,300 PSI, Temp Range -425 To 1200 Deg F, Hex Size 14mm, Length 12.7mm, Standards SAE, ASTMA, ASME, MIL-F-18866, CE'