This is a coupling that allows you to connect the flywheel and clutch on to (Diesel version)
And then slides on to a Nissan motor output splined shaft.
Specification bolts used with Diesel coupling
Eight of : M14
x 1.5 pitch
x 40mm long
10.9 Blk
Socket Head Cap Screws
Note the other images show how used, they are not included in price with couplings
This is for diesel coupling only
Details of assembly of flywheel coupling