Bolt 5/8"NC Threads
2.76"L overall
1.75"L reduced shank area with threads x 1.50" actual thread length
So called Smooth Head .87"OD x 1.02"L
Slotted on Threaded End for Flat Screw Driver.
PLATE Clutch, 8-5/8"OD x 3-7/5"ID x .31" thick. Has 8 holes .40" ID. Part numbers 258425, 453419, 87015182, 184318 supersede to 80453419 . This is new OEM New Holland part number is 184318 .