... type, Australian Type, Japanese type, Korean type, British type, and so on. All the produces in accordance ... or hot dip galvanization. Standard couplers are widely used with Ø48.3 steel scaffold tubes, we ... , 63 and 76mm. Also some special couplers are used for special functions, such as spigot support, deck ... at tightening torque of 54nm. 7.can be used to resist tension or compression loads. Swivel ...