T304 Stainless Steel Munsen type bossed pipe Pipe for 40 NB Pipe - M12 Boss Ideal for use with Unistrut and Oglaend metal framing system channels For Pipe Outside Diameter = 48.3 mm hole diameter 'd'= 7mm hole center to edge 'G'= 10mm Material width 'W'= 25mm material thickness 'T'= 3 mm Gap 'R'= 4mm NB= 40 mm D= 49 mm P= 75 mm Safe Working load = 100 kgf Proof load = 150 kgf Supplied with 2 - M6*25 stainless steel sets scews, full nuts and lock nuts T304 Stainless steel provides a corrosion and oxidation resistance, however it can tarnish. Used extensively in every day life, but if you need a higher level of corrosion resistance such as in a marine environment look for T316