Specification Sheet Part Number: 166-90019 Ensures fast and secure assembly with non-metallic NPT fittings. HelaGuard Non-Metallic Locknut, NPT Thread, 0.50 Dia, PA66, Black, 10/pkg Article Number 166-90019 Type ALPA0500 Color Black (BK) Quantity Per bag Product Description Made of strong and chemical resistant PA66 material, locknut secures non-metallic NPT fittings when used with non-threaded entries. Short Description HelaGuard Non-Metallic Locknut, NPT Thread, 0.50 Dia, PA66, Black, 10/pkg Global Part Name ALPA0500-PA66-BKVariant Locknut Thickness T (Imperial) 0.265 Thickness T (Metric) 6.7 Nominal Diameter (Imperial) 0.5 Nominal Diameter (Metric) 21 Material Polyamide 6.6 (PA66) Material Shortcut PA66 Halogen Free Yes Operating Temperature -58F to +275F (-50C to +135C) ROHS Compliant Yes Package Quantity (Imperial) 10 Package Quantity (Metric) 10 Customs Number 3926909988