Caliper banjo bolt thread engagement

[Rhino]

I have a pair of C5 front calipers and '02 Camaro rear calipers going on my '68. To transition from hard lines to soft lines I purchased a set of Russell braided lines for a C5. In that order I also picked up a set of Earl's 10 x 1.0 Banjo bolts. Everything looks good at first glance, but I do wonder how much banjo bolt thread engagement is enough. On initial assembly I seem to have roughly 1/4" of thread. I'm sure I'll pick up a little when the washers bed in as they're tightened, but I don't anticipate that'll amount to much.

Does this seem like enough? I've also seen people mention that 10mm x 1.5 were "correct" however I didn't know at the time if the 1.5 was length or thread pitch. Would the 10mm x 1.5 be a better choice?

http://i5.photobucket.com/albums/y169/RhinoSS/68%20Camaro/Brakes/IMG_8059.jpg
http://i5.photobucket.com/albums/y169/RhinoSS/68%20Camaro/Brakes/IMG_8062.jpg

[Rhino]

I just happened to stumble across one of the old C5 stock lines when looking for something else. The russell line where the banjo bolt block is marginally thicker (1/8" max).

I guess that's enough for me to call it good.

[Schwartz Perf]

That's not enough engagement for me to be comfortable.

10 x 1.5 usually refers to pitch.. so if the 1.0 is the correct pitch for your calipers, then not sure what to tell ya.

I'd usually like to see 3 more threads showing than what you have now.

-Dale

[Rhino]

Thanks Dale. That's my gut feel as well. Even though the stock C5 components seem similar, it doesn't make me much happier.

I'll be checking out a few differing brands of banjo bolts to see if I can find something a little longer.

as a side note: I did later confirm that the 2nd number is referring to thread pitch. It's only coincidence that the full length of the bolt (including head) is also 1"

[kevin_l]

Chrck out pure choice motorsports, they should be able to help you out. Very nice people answering the phones too.

[Rhino]

This evening I dug up a stock C5 banjo bolt, and I think I found the problem. One of these things is not like the other.
https://c1.staticflickr.com/3/2842/33746918761_3224ab836e_c.jpg

I'm not sure exactly what these Earl's bolts are for, but they're certainly not for any application I'm interested in.

I'd recommend staying clear of PN 997517ERL

[CarlC]

Small parts like these can often be found on Rockauto.com at quite good prices. I used two of the C6 banjo bolts recently and they were 1/2 the cost of other aftermarket pieces.