1977 280z. Front bumper mounts. My car didn't come with a bumper and none of my bolts fits.

Z Car Depot Inc

Bumper Bracket to Body Bolt Front Rear 240Z 260Z 280Z

Bumper Bracket to Body Bolt Front Rear 240Z 260Z 280Z - 650-194 (). Bolt and washers for attaching front or rear bumper brackets to the body on Datsun 240Z, 260Z and 280Z, 1970-78.

Which bumper are you trying to install? 280 or 240 series?

1 hour ago, DatsunZGuy said:

Z Car Depot Inc

Bumper Bracket to Body Bolt Front Rear 240Z 260Z 280Z

Bumper Bracket to Body Bolt Front Rear 240Z 260Z 280Z - 650-194 (). Bolt and washers for attaching front or rear bumper brackets to the body on Datsun 240Z, 260Z and 280Z, 1970-78.

56 minutes ago, Yarb said:

Which bumper are you trying to install? 280 or 240 series?

56 minutes ago, Yarb said:

Which bumper are you trying to install? 280 or 240 series?

I'm not trying to install a bumper I need to know what thread this 10 mm is. 1.0? 1.25?

There were 10 mm bolts in the holes but the thread was wrong and they only went in about 3/4 of a turn

Which hole? You could probably buy a small selection at your local hardware store for a few dollars. Try them out and you'll know.

Edited 9 hours ago9 hr by Zed Head

I'm gonna guess 1.25

Don't recall any 1.0 while I've ben fooling with Zs.

Edited 6 hours ago6 hr by siteunseen

Go buy some taps to figure out your issue. Chances are it’s 1.25. You’re going to need to clean the threads regardless. Don’t try to install a bolt without cleaning almost every thread you run into.

They are 10mm x 1.25.

I'm not reusing the old hardware so i made my own chase with one of the old bolts and that cleaned them up. thank you for everyones help.