Tensile Strength Stainless lugs and hub plange bolts

[jp-]

Mercedes you are not wrong. There is a 3/8 x 16 UNC and a 3/8 x 16 BSC. The thread count is the same, but the pitches are different, 60 deg vs 55 deg for the BSC. You should not mix and match these as you will lose some strength by doing so.

UNF and BSF will not go together, so no chance of getting these two mixed up.

BSC and BSF are available from several online suppliers.

[Daurie]

Does anyone see an issue with stainless steel lugs 1 1/16 in 316 Marine Grade Stainless.
Thanks

Stainless fastners, by reputation, just don't stand up to repeated use. Try out the 1 1/16 lugs and let us know how it goes.

[jp-]

Does anyone see an issue with stainless steel lugs 1 1/16 in 316 Marine Grade Stainless.
Thanks

There is a reason that most lug nuts that are stainless are only clad in stainless (outer shell is stainless). The base metal is grade 8 steel.

[Mercedesrover]

Just went out and pulled a bolt out of a spare diff housing. That thread is 3/8" x 20. I knew it was something funky. If anyone finds 3/8" x 20 studs and nuts I'd love to have some myself.

[Terrys]

Doh! My bad. If I remember right these drive flange bolts are 3/8 x 18. Is that right? It's been a while since I've been down that road trying to find an alternative.

Don't make me go out there again Jim. I just did the same thing, but you have more energy than I. I pulled a front drive flange bolt. It's 3/8 BSF (which I thought was 18tpi. If memory serves, which is hit or miss lately, isn't 3/8 BSF the same as 5/16 Whitworth?

[Mercedesrover]

3/8" BSF is 20tpi. 5/16 BSW is 18tpi and 3/8" BSW is 16tpi.
Is 3/8 BSF the same bolt size as 5/16 BSW?