Compatible with/Replacement for SINGER brand sewing machine models:1200, 1280, 2302, 2303, 2304, 2315, 2330, 240, 2404, 241, 242, 247, 248, 249, 250, 2500, 252, 257, 258, 259, 263, 267, 288, 300, 3100, 3101, 3102, 3103, 3105, 3130, 3140, 353, 354, 362, 367, 368, 547, 563, 588, 6010, 6017, 6021, 6100, 6102, 6104, 6105, 6106, 6110, 6120, 6130, 6136, 6146, 6152, 6156, 6174, 6184, Compatible with/Replacement for SINGER brand sewing machine models:7100, 7101, 7102, 7104, 7105, 7106, 7108, 7110, 7136, 7171, 7174, 7184, 8100, 964, 966, 968, 972, 974 (some of these series did not use this gear they use timing belt #423107-001) This gear has a set screw, not for models which use a pin