question on bolt fabrication...

[Jurko]

I'm modifying a BMW-type backrest for my S10.

I need to replace the two Yamaha 4-inch bolts on the luggage rack with new bolts about 5.5 inches long. The thread size is 8M x 1.25.

I can't find bolts that are 5.5 inches long, but I think I can fabricate them by taking a threaded rod and cementing a cap (or acorn) nut to one end. I'd use Loctite Red 271 to cement the rod and nut together.

Would this produce a permanent bolt, do you think? Or is there a better solution?

Many thanks for your advice.

 

[Poohbear]

You should be able to get M8 x 150mm (6") and then get them cut down a bit.

 

[markjenn]

It might work, but I'd never depend on any kind of adhesive to secure the head of a load-bearing fastener to the shank. The shearing action when you torque the bolt down is likely going to fail any adhesive, and if it didn't fail then, it might on the road when someone puts any load on the backrest. If you had to, perhaps drilling out the head to allow the rod to insert into the head would help, but I still think you need to find the right-length fastener (see link below) or cut down a longer one.

http://www.boltdepot.com/Metric_hex_bolts_Zinc_plated_class_8.8_steel_8mm_x_1.25mm.aspx

- Mark

 

[HoebSTer]

There are bolt houses all across the USA. If you don't find one, contact Sam at Tacoma Screw here in Kirkland, WA. I deal with him for work and personal. They can get what you want, and even in a Stainless and or cap screw for an allen head if you want.

 

[jajpko]

The bolts Mark posted should be the ones you need. If you need the flat head allan, McMaster Carr may have them. Finding the length in flat heads is the hard part.

If you don't have any luck, get back to me and I'll see what I have in my bolt pail..

 

[Jurko]

I'm placing an order with Bolt Depot.

Thanks very much for your advice!