Complete Tension Assembly For For Singer Sewing Machine. Singer part # : 422403-455 For Singer sewing machines : 237, 239, 240, 241, 242, 247, 247AP, 248, 250, 251, 252, 257, 258, 259, 288, 300, 327, 328, 329, 337, 338, 347, 348, 360, 362, 366, 367, 400, 401, 403, 404, 413K13, 416K, 418, 457, 466, 476, 477, 478, 500, 502, 503, 507, 509, 513, 522, 527, 533, 543, 600, 603, 604, 620, 620E, 625, 626, 628, 629, 630, 630E, 635, 635-9, 636, 638, 639, 640E, 645, 645-9, 646, 649, 1247, 1263, 1280, 1288, 1802, 1803, 1812, 1852, 1853, 1862, 1872, 1873, 2404, 2430, 3101, 3102, 3103, 3105, 3140, 4825, 4828, 4830, 6011, 6012, 6102, 6104, 6105, 6106, 6110, 6120, 6130, 6136, 6146, 6152, 6156, 6174, 6184, 6201, 6202, 620-9, 620E31, 6211, 6212, 6214, 6215, 6217, 6606, 7015, 7101, 7102, 7104, 7105, 7106, 7108, 7110, 7136, 7174, 8100, 8200, 8500, 8600, 8734, 8774, 8834, 9500, 9600, 9900