I'd like to identify the parts used to make the AIH/Williams spunding valves, but I could use some help identifying parts. I'm sure the overall cost will be about the same as just buying from those stores, but they are both currently out of stock. I've taken my best shot at identifying the parts, but any help is appreciated especially for #4 and #5.
1. 0-60psi pressure gauge, 1/4" NPT male
2. 1/4" NPT T-fitting, female
3. Gas pressure relief, 1/4" NPT male
4. 1/4"
mNPT to mNPT nipple (does this seem correct?)
5. 1/4"
fNPT to fMFL (does this seem correct? swivel? how about fMFL diameter?)
edit: thanks nate for help on #4/5