Thread Bushing (Item No. 2-280618, also known as S2-280618) - Acme trapezoidal thread 20 x 4 mm for system 28 screw clamp arbor. The burnished Threaded Bushing was especially designed for working in restricted spaces. The threaded bushing is the compatible counterpart which incorporates screw clamp arbors from the 16 mm system (Tr 12x3) or the 28 mm system (Tr 20x4). A combination of threaded bushing, screw clamp arbor and heavy squares, is ideal to perform complicated horizontal clamping tasks.
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