Plant your poinsettia in an area that receives full sun most of the day. However, keep in mind that to put out flower buds, poinsettias require 14 hours of complete darkness each day for 6 to 8 weeks before flowering. Any interruption to this dark period can delay or prevent the plant from flowering. Watering & Soil. Keep the soil moderately moist at all times. Poinsettias grow best in moist, well drained, fertile soils. As long as the soil is well drained, they will grow satisfactorily in a wide range of soils, including sand, muck, marl and clay.
Conical taper is the change in the diameter of a circular solid along its length. It can be expressed in linear units such as inches per foot or as an angle. When the decrease in diameter and the length are viewed as two sides of a right triangle, trigonometry can be used to convert the linear unit expression to an angle.
Taper Threads. BS taper threads are also referred to as British Standard Taper Pipe, Pipe Taper or Conical Thread. Common symbols used for the thread: BSPT, BSPTr, PT, KR, R, Rc. Usually marked: Rc size ISO. Characteristics of BSPT taper threads: tapered thread 1 o 47' truncation of roots and crests are rounded; 55 o thread angle