Check the listing for details. Thread Tension Check Spring For Singer Sewing Machines #66774 - 3 Pack. Condition: New. Listed at 4.95 USD. Tension Check Springs For Singer Sewing Machine Description: Pack of 3, Thread Tension Check Springs For Singer Sewing Machine. Part # 66774. These high quality tension check springs will fit following Singer machines : 201, 201-2, 221 Featherweight, 222, 223, 237, 239, 240, 241, 242, 247, 247AP, 248, 250, 251, 252, 257, 258, 259, 288, 293B, 301, 337, 338, 348, 401, 416, 500, 502, 503, 507, 509, 513, 514, 518, 522, 527, 533, 534, 538, 543, 600, 603, 604, 620, 620E31, 625, 626, 628, 629, 630, 630E, 635, 636, 638, 639, 640E, 645, 646, 649, 1200-1, 1247, 1280, 1288, 1802, 1803, 1812, 1852, 1862, 1872, 1873, 2404, 2430, 2732, 3101, 3102, 3103, 3105, 4522, 4525, 4526, 4528, 4530, 4538, 4825, 4828, 4830, 6011, 6012, 6021, 6102, 6104, 6105, 6106, 6110, 6120, 6130, 6136, 6146, 6152, 6156, 6174, 6184, 6201, 6202, 6211, 6212, 6214, 6215, 6217, 6221, 6513, 6522, 6528, 6533, 6543, 6544, 6548, 6606, 7025, 7101, 8019, 8502, 8505, 8518, 8602, 8605, 8606, 8610, 8614, 8618, 9900 To verify the compatibility to your sewing machine, please e-mail the brand & model number. Payment: We accept Visa, MasterCard, Discover, American Express and PayPal. Payments are due within 3 days of the date of purchase unless you are bidding on multiple items. Shipping: All orders are carefully packaged and shipped via USPS 1st Class Mail, Priority Mail, or UPS Ground, depending on order value and size. Shipping Discount is available for this item. Purchase additional item from our other listings and save on shipping. We combine shipping when you buy two or more items from us, the more you buy, the more you save on shipping. To receive a shipping discount, please ask for a combined invoice before you pay.