Standard: din 71412 sizes:as per the attached pdf file or as per customer requirement material: m.s., en 1a leaded, 11smnpb30+c, s.s. 303, s.s. 316 hardness: min.550 hv for nipple head, if required thread: parallel, taper surface treatment: clear (blue) zinc plated, yellow zinc plated, olive green zinc plated, zinc trivalent plated