Please note: Images are for representation purposes only. Products may differ from those shown above. Discount % are rounded to Nearest whole number.
H Roberts thread form overlay charts can be used with most types of shadow graph profile projectors giving an accurate reference when checking and comparing thread forms (Thread Angles, Pitch, Diameters) They feature metric pitch 0.25mm – 3.5mm and imperial UN pitch 48 – 8. Can be used with 10x, 20x, 50x, 100x magnification, chart diameter 300mm.