SPOOL PIN (2 pins) # 173571 Singer 6156 6174 6184 7100 8700 Alt# 507139

Approximate Measurements Are:
Length - 1 & 3/4"
Width - 3/16" with tip 5/32"

These are New Spool Pins (2pc.) # 173571 that fits the following models.

SINGER MODELS - 185, 1247, 1263, 1802, 1803, 1812, 1852, 1853, 1862, 1872, 1873, 2302, 2303, 2304, 2313, 2315, 2330, 237, 239, 240, 242, 241, 2430, 2440, 247, 247AP, 248, 249, 250, 2502, 2503, 2504, 251, 2515, 252, 2530, 257, 258, 259, 263, 285, 288, 290, 3101, 3102, 3103, 3105, 3314, 3317, 3343, 350, 360, 362, 366, 367, 417, 424, 547, 563, 6100, 6102, 6104, 6105, 6106, 6110, 6120, 6130, 6136, 6146, 6152, 6156, 6174, 6184, 7100, 8700.

Alternative Part Numbers Include - 507139.