AM65327 Knife Guard model-1691280 It is a square nut

It is a square nut used throughout a wide range of Fits CAT dozers

Note: 3 blades required per 60" deck

Diameter: 12"

Ariens / Gravely Zero-Turn Mowers: ZT18

Black 12ga under serrated

AM65327 Knife Guard model-1691280 It is a square nutOne New Aftermarket Replacement Knife Guard Fits Versatile Platforms 4812, 4814 Fits Case IH Swathers 8210, 8220, 8230, 8240, 8820, 8830, 8840 Fits Platforms 970, 972 Fits New Holland Swathers 900, 903, 905, 907, 910, 912 Fits Mower Conditioners 8320, 8330, 8340, 8350, 8360, 8370, 8380 Fits Gehl Swathers 2230, 2262 Replaces Part Number(s): 65327, 611179, V94711, 748178, 700700845, 611902