Compatible With: fit for Stihl MS171 MS180 MS181 MS192T MS211 MS231 MS250 MS251 MS291 MS311 MS361 MS362 MS381 MS391 MS440 MS441 MS461 MS660 chainsaw. 10 x M8 Guide Bar Nut fit for Stihl MS 180 250 381 361 440 660 Chainsaw.
eBay