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These Doughty Gravlock Couplers are designed specifically to secure a BS1139 scaffold tube with 2'' diameter to a girder/beam at 90 degrees. Suitable for flanges up to 1.8'' thick.
With a zinc plated exterior, a long life can be guaranteed. It is important to note that these couplers must be used in pairs as supplied and clamped on opposing sides of the structural sections
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