Posted: Sat Jul 04, 2020 1:10 pm Post subject: Bolts for campanion flange at parking brake
When re-installing my parking brake drum and companion flange for the drive shaft I noticed that the 4 bolts that hold the brake drum, companion flange and u-joint were not in very good shape. The bolt is supposed to be 3/8 X 1 3/8 NF. The shank on the both is about 7/8 and the treads about 1/2 inches.
The only grade 8 bolts I have found locally are 3/8 x 1 1/2 but have no shank, they are threaded from the bolt head to the end.
I think that the extra 1/8 inch in length is probably not a problem but I don't know if it is important that the bolt have the un-threaded shank or not.
The only other direction I could steer you is to an AN6- bolt with the same length shank as the spicer bolt. Just measure that smmoth shank which is also often referred to as grip length and compare it to an AN6- Catalog for the closest matching grip length. Keep in mind that your grip length should never be greater than the combined thickness of the joined materials!
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