Are these original Mopar nuts and bolts?

[GUMM B]

These are the nuts and bolts that mount my OEM fan shroud to the radiator. The nuts are stamped "CIP" with "GR-5" underneath. The bolt heads have crosshair dashes casted at the 9:00, 12:00, and 3:00 positions with some kind of a Y-ish symbol at the 6:00 position. Thread size/pitch is 1/4-20 NC and the bolt heads take a 7/16" 6-point hex socket. The washers are captive, they'll turn, but they won't go down the threads which is nice. Are these nuts and bolts the originals from the factory?

 

[Kern Dog]

The bolts/screws look authentic, the Tinnerman nuts were used on more models than just our Mopars.

 

[Bird 426]

Yes, well, sort of. What vehicle are we talking about here?

 

[YY1]

Responded on the A body post.

They are extremely similar but not quite.

 

[Black_Sheep]

FWIW my ‘69 has permanent studs on the shroud brackets and bright finished flanged nuts.