彈簧，4.5 mm x 7 mm

Put this spring into my SC4 lathe and it fit the part #60 slot perfectly, no modifications needed. The 4.5 mm diameter is just right for the assembly. Very pleased with how easily it replaced the old worn one.

I was a little worried it wouldn't fit my SC4 lathe, but the 4.5 mm diameter and 7 mm length were spot on for part #60. The spring feels sturdy and works perfectly to keep tension on the lead screw.

The 4.5 mm width matches the original part exactly, so the carriage feed works smoothly again after I swapped it in. I had to tweak the tension slightly, but it holds its shape well and hasn't slipped since.