PART NO. THREAD WELDTUBEO.D DIMENSIONS E D A L S1 5TW-04SP/IN R1/4"X19 1/4" 14.5 23.5 14 5TW-04-06SP/IN R1/4"X19 3/8" 14.5 24.5 14 5TW-04-08SP/IN R1/4"X19 1/2" 14.5 24.5 17 5TW-06SP/IN R3/8"X19 3/8" 15 25 19 5TW-06-08SP/IN R3/8"X19 1/2" 15 25 19 5TW-08SP/IN R1/2"X14 1/2" 20 32 22 5TW-08-10SP/IN R1/2"X14 5/8" 20 33 22 5TW-08-12SP/IN R1/2"X14 3/4" 20 36 24 5TW-12SP/IN R3/4"X14 3/4" 20 36 30 5TW-12-16SP/IN R3/4"X14 1" 20 37 32 5TW-16SP/IN R1"X11 1" 25.5 42.5 36 5TW-16-20SP/IN R1"X11 1.1/4" 25.5 44.5 38 5TW-20SP/IN R1.1/4"X11 1.1/4" 26.5 45.5 46 5TW-20-24SP/IN R1.1/4"X11 1.1/2" 26.5 47.5 46 5TW-24SP/IN R1.1/2"X11 1.1/2" 26.5 47.5 50