Threaded pipe plugs are designed to close the ends of internally threaded pipes and fittings.Also known as Threaded Pipe Fittings or Threaded Screw Plugs.An internal hex socket drive is also known as an Allen drive.Diameter (Nominal): M18Thread Pitch: 1.5Diameter (Dimension): 18mmLength (Nominal): 16mmThread Length: 12mmRecess Size: 8mmHead Diameter: 23mmHead Diameter (Minimum): 22.48mmHead Diameter (Maximum): 23mmHead Height, Overall: 4mmHead Height, Overall (Minimum): 4mmHead Height, Overall (Maximum): 4.5mmProduct Class: Externally Threaded FastenersOrder: Machine Thread FastenersCategory: Pipe PlugsSystem of Measurement: MetricBrand: Aspen Fasteners®Drive Style: Hex Socket DriveThreading: Straight ThreadThread Direction: Right-Hand ThreadMaterial: SteelCoating: UncoatedStandards and Specifications: DIN 908