Mounting bolt for 1968 ford 302 oil dipstick tube

Cougar Community Classic Cougar Maintenance Restoration and Repair
1

Does anyone know the diameter/thread size(count) for the mounting bolt for a 1968 ford 302 oil dipstick tube? This is the one that screws into the cylinder head.
Steven

2

the one in my car is 3/8 in. 16threads

3

Thanks so much for the info.
Steven