A-R502511-AI Bolt, Head model-138-638 The roll features tapered flutes

The roll features tapered flutes and a hardsurfaced cast construction for extended wear life under heavy field conditions

Quantity: 3 blades per set (required for 44" SFS deck)

leak-resistant seal by thread deformation

2555 - GPT North American (S/N 636072-663473)

960 (1953 - 1956) ]

A-R502511-AI Bolt, Head model-138-638 The roll features tapered flutesOne New Aftermarket Replacement Cylinder Head Bolt for John Deere PowerTech Engines This flanged cylinder head bolt is a critical engine fastener used in John Deere 300 Series PowerTech diesel engines. It secures the cylinder head to the engine block and must be torqued to specification during engine assembly or rebuild. Grade 8 strength and flanged head design match original equipment requirements for the 3029, 4039, 4045, 6059, and 6068 engine