Oregon Tool® - 21-3/16" Lawn Mower Blade

Blade Width - Measure near the center of the blade.
Thickness - Measure near the center of the blade.
Blade Length - Measured diagonally from the corners of the blade
Center Hole Size - Many blades will have a round hole in the center of the blade and you will need to know its diameter. Blade Length 5 or 7 Point Star Center holes may be 5 or 7 point star shaped. 5 point star on blade7 point star on blade Square or Rectangular The MTD built blades on many walk behind lawn mowers have a 'bow-tie' hole. In this case the Oregon replacement blade will have a rectangular center hole which will fit on the bow-tie pattern on the blade adapter. Square or Rectangular hole on blade MTD Blades The MTD™ built blades (Bolens, Cub Cadet, Troy-bilt, White, Yard Machine, and Yardman) may have a 6 point star. Oregon replacement blades will have a 'Y' shaped center hole which will fit exactly on the 6 point star on the blade spindle. 6 point star for MTD blades The two sizes of the 6 point star. If your blade spindle has a bolt and lock washer that holds the blade to the machine you would use the 11/16" star or 'Y' blade. blade spindle with bolt and lock washer. If your blade is secured with a large flange nut then you would use the 5/8" star or 'Y' blade. blade spindle with large flange nut
OffSet - (Sometimes referred to as offset): If you set the blade on a table this is the distance the center of the blade is above the table top (if any) when the cutting edges are flat on the table
Air Lift - Air lift is the distance the lift panel rises above the cutting edge.

Fit Guide
Cub Cadet: 131PA1ZS099 (T7800), 132PA1ZS099 (T7800), 13A2775S000, 13A277KS897 CLT42G, 13A277XS099 (T1000), 13A277XS299 (T1000), 13A278XS099 (T1200), 13A278XS299 (T1200), 13A878XS099 (T1300), 13A879KS897 CLT42H, 13AD775S059, 13AD78XS099 (T1400), 13AL795S004, 13AM775S000, 13AM775S058 M115-42, 13AM775S200, 13AP78XS099 (T1800), 13APA1KS897 CYT4220SE, 13APA1ZS099 (T8000), 13AX795S004, 13AXA1KS897 CYT4220, 13B2775S000, 13W277SS031 (LT 4200), 13W277SS031 LT 4200, 13W277SS231 (LT 4200), 13W277SS231 LT 4200, 13WN77SS031 (LT4200), 13WN77SS231 (LT4200), 17AKCACS099 (Z6000), 17AKCACS299 (Z6000), 17ARCBDS099 (ZS6500), 17ARCBDS897 ZT-S42 KH, 7ARCBDS897 ZT-S42 KH, CLT42G 13A277KS897, CLT42H 13A879KS897, CYT4220 13AXA1KS897, CYT4220SE 13APA1KS897, LTX1040, LTX1042, LTX1042KH, LTX1042KW, LTX1045, M115-42 13AM775S058, RZT-L42, RZT-S42, RZT42, ZT-L42 KH 17ARCACS897, ZT-S42 KH 17ARCBDS897

Replacement Guide
Bolens: 742-0616, 742-0616A, 942-0616, 942-0616A, OEM-742-0616
Cub Cadet: 490-110-C109, 490-110-C122, 490-110-M108, 490-110-M115, 742-04087, 742-04308, 742-04312, 742-04360, 742-04410, 742-0616, 742-0616A, 742-0656, 7420616, 942-04087, 942-04126-X, 942-04308, 942-04308-X, 942-04312, 942-04312-X, 942-04360, 942-04360-0684, 942-04410, 942-04410-0684, 942-0616, 942-0616-X, 942-0616A, 942-0656, 94204308, 94204308X, 94204312, GW-7420616, OCC-742-04312, OCC-742-0616, OEM-742-04308, OEM-742-0616
Laser: 91032
MTD: 490-110-M108, 490-110-M115, 742-04087, 742-04308, 742-04312, 742-04410, 742-0616A, 742-0656, 742-4360, 7420616, 942-04087, 942-04308, 942-04308-X, 942-04312, 942-04312-X, 942-04360-0684, 942-04410, 942-04410-0684, 942-0616, 942-0616-X, 942-0616A, 942-0656, 942-4360, GW-7420616, OEM-742-04308, OEM-742-0616
Mowmore: MTD1031
PLP: 7-044034
Rotary: 1031, 11233
Sears: 07133032000P
Stens: 335-711
Sunbelt: B1MA2416
Troy-Bilt: 490-110-M108, 490-110-M115, 742-04087, 742-04308, 742-04312, 742-04410, 742-0616A, 742-0656, 742-4360, 7420616, 942-04087, 942-04308, 942-04308-X, 942-04312, 942-04312-X, 942-04360-0684, 942-04410, 942-04410-0684, 942-0616, 942-0616-X, 942-0616A, 942-0656, 942-4360, GW-7420616, OEM-742-04308, OEM-742-0616