Spring hangers (shackles) have 7/16-20 threads. But some of the castle nuts that fit them are 5/8" across the flats and some are 11/16". Just another little wrinkle to keep things interesting.
You are on an island in the jungle. Escape is impossible. Be happy in your work.
Steve -- All of them I've encountered are 11/16". I think that is correct.
1/4 inch bolts have 7/16 head and 7/16 nut
5/16 bolts have 1/2 inch head and nut
3/8 bolts have 9/16 head and nut except for some older ones with 5/8 nut
7/16 bolts have 5/8 head and 11/16 nut except for some older ones that have 5/8 nut
1/2 inch bolts have 3/4 head and nut
9/16 bolts have 13/16 head and 7/8 nut but 9/16 lugnuts are 13/16
5/8 bolts have 15/16 head and nut
3/4 bolts have 1 1/16 head and 1 1/8 nut
does anybody know why some sizes have the same head and nut while others are different?
Like the rod nuts, bigger surface area to carry the load.
Agreed Mike - 11/16" on the shackle nuts and also correct Mark - T rod nuts are indeed 3/8-24 but the head is 5/8".
Most Model T nuts have heads, but with them hat size is more important than thread size.
The most common nut problem is the hub bolt nuts. The new ones are 5/8, whereas the original Ford nuts are 11/16.
My Ford wrench is 5/8 for the lug bolt and 15/16 for the spark plug.
"hub bolt nuts."
Methinks Larry is talking about the nuts on the bolts that hold the hub together, not the lug bolt nuts.
That's ok Steve, I'm still finding a few metric nut/bolts . Dad used what ever was on hand.
George n L.A.
I always thought that the nuts were larger because the mechanics only had one set of wrenches, think about it.