Easy one - fastener specs

Thanks for your help - Ive decided to ord the factory replacement parts -

Idler Pulley - This is the pulley on the alternator side of the Water pump - it seems that the idler pulley has an integral threaded stud - not a separate bolt like i thought

Tensioner pulley - The tensioner pulley "screw" has a special retaining washer ....

......so Im safer with the Mopar parts.

If Im wrong on the idler pulley please let me know - but the parts manual has no listing for an "idler pulley bolt"