Spool Cap and Spool Pin Spare Part Function and benefits The spool cap attaches to the spool pin to hold the thread in place. It helps the thread unwind smoothly and prevents it from jumping or tangling while you sew. This part supports consistent thread feed and reduces thread snags during operation. Product details Part number: R60033210 Description: Spool Pin, sewing machine spare, extra spool pin accessory for auxiliary use Compatibility Compatible with Singer models: 4423, 4432, 4452, 5511, 5523, 5532 Heavy Duty, 5554, 6510, 6550, 7312, 7322, 7350, 7360, 7380, 8260L, 8275, 8280, 8770, 9100, 9340, 992DE, ET1, H74 Compatible with Singer Sewing Machines: 1105, 1116, 1120, 1130, 1507, 1525, 1725, 1748, 2009, 2010 Professional, 2010 Superb, 2250, 2259, 2263, 2273, 2277 Tradition, 2282, 2932, 3116 Simple, 3221 Simple, 3223, 3229, 3232 Simple, 3321, 3323, 3337, 3342 Fashion Mate, 3709, 37091, 3722, 37221, 3750, 3810, 38101, 3820, 38201, 3825, 38251, 3860 Use scenarios Routine maintenance on compatible Singer machines to a worn or absent spool cap, restoring smooth thread release. For home sewing projects on garments or quilting, ensuring reliable thread unwinding to reduce interruptions. Keeping a dedicated spare on hand in a sewing room for quick swaps during long sewing sessions or classes.