ISO 14581 formerly referred to the DIN 965 specification.Machine screws are designed for applications with a pre-tapped hole or mated to a threaded nut.A 6-lobe recess is also known as a hexalobular internal drive.A4 stainless steel is functionally equivalent to 316 grade and is also known as "marine grade".Stainless steel significantly improves resistance to tarnishing or corrosion.Diameter (Nominal): M6Thread Pitch: 1.0Diameter (Dimension): 6mmLength (Nominal): 20mmThread Length: 16.7mmRecess Size: T30Head Diameter: 11.3mmHead Diameter (Minimum): 10.87mmHead Diameter (Maximum): 11.3mmHead Height, Overall: 3.3mmProduct Class: Externally Threaded FastenersOrder: Machine Thread FastenersCategory: Machine ScrewsSystem of Measurement: MetricBrand: Aspen Fasteners®Head Style: Flat Countersunk HeadHead Style Detail: 90 Degree CountersinkDrive Style: 6Lobe DriveDrive Detail: Torx® Generic AlternativeThread Length: Full ThreadThread Direction: Right-Hand ThreadMaterial: Stainless SteelMaterial Grade: A4 Stainless SteelCoating: UncoatedStandards and Specifications: ISO 14581