Tap here to read more about Caltric M157175 Deck Pulley for John Deere X320 X324 X340 48″/ X500 X520 48″ 54. Premium Quality Replacement Part. Deck Blade with Bolt. LZ 30 (968999677) – (2008-01). LZ 30 (968999677) – 72 (2007-12). BZ 7234 D BF (968999370) – 72 (2005-08). BZ 7234 D (968999264) – 72 (2005-08). BZ 7234 (968999264) – 72 (2005-01). Notched Medium Lift Deck Blade. Length : 635 mm – 25 in. Width: 6 mm – 0.23 in. Hole Diameter : 15.8 mm – 5/8 in. 3 x Bolt: 539103299. Length: 41.7 mm – 1.64 in Head Diameter: 23.5mm – 0.92 in Threads Size: 5/8-18. Fits Spindle: 539114821, 966956201, 539112934.