Spool Pin (172007) and Felt (8879) fits Singer Models 27, 328, 329, 337, 338, 347, 348, 401, 401A, 403, 403A, 404, 413K, 413K13, 416K, 418, 457, 466, 476, 477, 478, 502, 507, 509, 513, 514, 518,, 522, 527, 533, 534, 538, 6513 - 6548 and many more.
eBay