hardware questions

[bartZ32tt]

Got some questions while my engine is up on the stand:
1. does anyone know the specs (screw shank width/length/thread pitch) of the fuel rail retaining screws? I'm trying to replace them with ss allen cap screws - just like the ones that are included with 300 degree fuel rails. I know they're bigger than injector cap screws, but don't know the actual specs.
2. I'm looking to buy the constant tension spring clamps for the rubber fuel lines (part#16439-16E0A). Unfortunately, they are over $3/clamp locally and $2.74 + shipping/clamp from courtesy nissan. has anyone found an alternative or know of a better place to buy? $35 for 10 fuel clamps seems a bit obsurd to me.
3. I'm probably out of luck on this, but the guy I bought my motor from was in the middle of a pcv re-route. He pulled off the metal PCV vent hoses from both intake valve covers - would anyone happen to know what size of freeze plug I need to cover it up? (the exhaust valve covers are already blocked off). I may just have to buy a digital caliper and measure it myself..

[bartZ32tt]

Update: bought a couple class 12.9 M6 X 1.0 X 20mm screws for the fuel rail and they work perfectly! Good to have my nismo 740's finally installed. Best of all - they were available at my local hardware store - surprising since most stores around me fail to carry a good selection of metric fasteners.

Would still love some feedback from anyone with knowledge on my other questions.