Feature:OOTD Type Fits for Chainsaw Model MS170 MS180 MS230 MS250 MS260 MS290 MS360 MS390 MS380 MS381 MS440 MS460 MS640 MS650 MS660 009 010 012 015 020T 021 023 025 024 026 028 038 031 032 034 036 041 042 044 046 048 050 051 056 064 0666 high quality aftermarket profile nuts that work great on Stihl, these nuts replace OEM number 0000-955-0801 and are used on the following models:009, 010, 011, 012, 017, 018, 019T, 020T, 021, 023, 024, 025, 026, 028, 029, 030, 031, 032, 034, 036, 038, 039, 041, 042, 044, 046, 048, 064, 066 MS170, MS180, MS181, MS190T, MS191T, MS192T, MS200T, MS210, MS230, MS240, MS240, MS241, MS250, MS260, MS261, MS290, MS271, MS310, MS340, MS360, MS361, MS362, MS380, MS390, MS440, MS441, MS460, MS461, MS660, MS661 plus others. Thread 19mm - 8x1.25.Does not fit saws with flange locking boltsDisclaimer:Reliable aftermarket parts are in no way affiliated with OEMs. All OEM part numbers and logos are to be used for identification purposes only. Specification:Color: Silver Material: Stainless Steel Size: As the picture Quantity: 6 PcsPackage Included:6 x Spare Nuts Profile