A Type A triangle has 15 hexagonal yods. When the 42 triangles in the 2-d Sri Yantra surrounding its central one is a Type A triangle, they have (42×15 = 630) hexagonal yods. This is the number value of Seraphim, the Order of Angels assigned in Kabbalah to the Sephirah Geburah (see here). If the central triangle is a tetractys with six hexagonal yods surrounding the central bindu (this is not shown so that it is not mistaken as a hexagonal yod), there are636 hexagonal yods. This is the sum of the Godname numbers of the 10 Sephiroth when YAHWEH replaces YAH, the older version of the Godname of Chokmah. 636 is also the number value of Rashith ha Gilgalim, the Mundane Chakra of Kether (see here).