GN 990 Connecting tubes technical informations Material - Steel ST, zinc-plated ZB, blue passivated. - Aluminium AL, blank BL, untreated. - Aluminium AL, anodised EL, natural colour. Features and applications Construction tubings GN 990 can be supplied in any length up to 3000 mm. The tolerances specified for the outside diameter of the round construction tubings comply with the requirements for split mono-block connector clamps. Otherwise the tolerances comply with DIN 2391, DIN 2395 and DIN 2462. Two-piece connector clamps allow obviously larger tolerances on round and square construction tubings. Accessories - Tube end plugs GN 991. - Insert bushes GN 992. Standard Elements Main dimensions Weight d s l d s w w Description g 1 1 0,5 2 2 1 2 D 10 GN 990-ST-D10-100-ZB - 100 7 - 1.5 - 31 0,1 D 12 GN 990-ST-D12-100-ZB - 100 9 - 1.5 - 40 0,1 D 14 GN 990-ST-D14-100-ZB - 100 11 - 1.5 - 46 0,1 D 15 GN 990-ST-D15-100-ZB - 100 12 - 1.5 - 52 0,1 D 16 GN 990-ST-D16-100-ZB - 100 13 - 1.5 - 54 0,1 D 18 GN 990-ST-D18-100-ZB - 100 15 - 1.5 - 61 0,1 D 20 GN 990-ST-D20-100-ZB - 100 16 - 2 - 89 0,1 D 25 GN 990-ST-D25-100-ZB - 100 21 - 2 - 113 0,1 D 30 GN 990-ST-D30-100-ZB - 100 26 - 2 - 138 0,1 D 32 GN 990-ST-D32-100-ZB - 100 28 - 2 - 148 0,15 D 35 GN 990-ST-D35-100-ZB - 100 31 - 2 - 163 0,15 D 40 GN 990-ST-D40-100-ZB - 100 34 - 3 - 274 0,15 D 42 GN 990-ST-D42-100-ZB - 100 36 - 3 - 288 0,2 D 45 GN 990-ST-D45-100-ZB - 100 39 - 3 - 312 0,2 D 48 GN 990-ST-D48-100-ZB - 100 42 - 3 - 334 0,2 D 50 GN 990-ST-D50-100-ZB - 100 44 - 3 - 348 0,2 D 55 GN 990-ST-D55-100-ZB - 100 47 - 4 - 506 0,25 D 60 GN 990-ST-D60-100-ZB - 100 52 - 4 - 550 0,25 GN 990-ST-V20-100-ZB - V 20 100 - 16 - 2 112 GN 990-ST-V25-100-ZB - V 25 100 - 21 - 2 144 GN 990-ST-V30-100-ZB - V 30 100 - 26 - 2 175 GN 990-ST-V35-100-ZB - V 35 100 - 31 - 2 206 GN 990-ST-V40-100-ZB - V 40 100 - 34 - 3 333 GN 990-ST-V45-100-ZB - V 45 100 - 39 - 3 380 GN 990-ST-V50-100-ZB - V 50 100 - 44 - 3 428 D 10 GN 990-AL-D10-100-* - 100 7 - 1.5 - 11 0,1 D 12 GN 990-AL-D12-100-* - 100 9 - 1.5 - 14 0,1 D 14 GN 990-AL-D14-100-* - 100 11 - 1.5 - 16 0,1 D 15 GN 990-AL-D15-100-* - 100 12 - 1.5 - 18 0,1 D 16 GN 990-AL-D16-100-* - 100 13 - 1.5 - 18 0,1 D 18 GN 990-AL-D18-100-* - 100 15 - 1.5 - 21 0,1 D 20 GN 990-AL-D20-100-* - 100 16 - 2 - 31 0,1 D 25 GN 990-AL-D25-100-* - 100 21 - 2 - 39 0,1 D 30 GN 990-AL-D30-100-* - 100 26 - 2 - 48 0,1 D 32 GN 990-AL-D32-100-* - 100 28 - 2 - 51 0,15 D 35 GN 990-AL-D35-100-* - 100 31 - 2 - 56 0,15