We offer self-forming thread grease nipples. * thread: tapered, wide flank angle such that it gets driven into the untapped hole * standard: din 71412 * sizes:as per the attached pdf file or as per customer requirement * material: m.s., en 1a leaded, 11smnpb30+c, free cutting steel * hardness: case hardened to 650hv; angled type - 550hv body & 650hv head * surface treatment: yellow zinc plated.