[ssondubs]

Can I just use a NPT pipe plug from a hardware store? What size do I need? I'm helping out a friend and wanted to know if I can save him some money.

 

[SEO9C1]

Can I just use a NPT pipe plug from a hardware store? What size do I need? I'm helping out a friend and wanted to know if I can save him some money.

No. Were it so, it would've been documented long ago. The bolt has specific characteristics and has to be manufactured to meet those tolerances.

I appreciate what you're doing, I went through the same thought process myself years ago, but don't waste your time at the least and compromise the integrity of the braking system at the most. It's too important (for all of us).