Singer Sewing Machine Thread Spool Pin, 1 3/4 inch Singer Thread Spool Pin, Fits: Models 327, 328, 329, 337, 338, 347, 348, 401, 403, 404, 413, 416, 418, 457, 466, 476, 477, 478, 502, 507, 509, 513, 514, 518, 522, 527, 533, 534, 538, 560 Spool Pin is Plastic, 1 3/4 Sewing Machine Thread Spool Pin.