u/DerCribben — reddlx

Fully rounded nut cover caps?

I’ve got an issue where the pop-top on my campervan is snagging on the bolt ends and M6 nyloc nuts behind my awning mounts.

All morning I’ve been searching for a smooth plastic nut cover/cap that looks like the drawing on the right, but all I’m finding are covers with a step/ridge around the perimeter like the one on the left. The one on the left might still work, but I was looking for something smooth enough to guarantee a snag free operation.

I’m hoping for a suggestion of where to find the kind I’m looking for, or maybe some better wording to use as n my searches since nothing I’ve tried seems to be getting joy.

Thanks

u/DerCribben — 3 days ago

▲ 3 r/AskChemistry+1 crossposts

Silica Gel Desiccants in Tyvek Packets, can they be regenerated? (This question is more about the Tyvek material than the silica)

Ok, so I've got a ton of silica gel packets in Tyvek packaging, I'd like to regenerate them but after pages and pages of searching on Google I've found people saying both yes and no, plus a ton of places that give regenerating advice (or none) with no mention of the material they're packaged in.

I've even just seen a page right before I came here to post this saying to regenerate it at 130c which is 5c under the melting point of Tyvek. When I read about the temperature range of Tyvek I'm seeing that it can permanently distort above 79c, it begins to shrink at 85c, and that its safe temperature range is -73c - 82c.

So my question is, can silica gel in Tyvek packets be regenerated? At a temperature that won't require me to run our oven for 24 hours or more? Will using the microwave method cause the silica beads to heat up to where they'll melt the Tyvek?

From the temperature range information I've found my instinct is no, but with so many people saying you can, and/or that they have regenerated the Tyvek packaged ones it makes me want to ask folks more educated in materials science to get a definitive answer.

Thanks in advance for any insight offered on this!

reddit.com

u/DerCribben — 1 month ago

▲ 2 r/AskMechanics

Difference/History of these two connector types?

So I’ve got a 1990 VW T3 Syncro 4WD with a 1.6 TD JX motor in it and around 150k km on it for the post requirements.

There’s an auxiliary coolant pump in it that can be one of these two types of connectors. One is the Junior (Power?) Timer/Jetronic, the other one I’ve seen described as a “Packard Style” connector? (AMP?)

The male end for the JPT connector has a single spline on the bottom and the Packard Style connector has two, otherwise they both look to be mostly identical.

I’m curious what the history of these connectors are and more importantly what the actual name is of the non JPT connector. (on the right, upper right, and top of the photos)

I’m just finding that when looking for a replacement pump that I have to zoom in on the pictures (if there are any from the right angle) and I figure that knowing the name of the different connectors would be a lot more accurate and efficient.

Whoever had the van before me just ground down the splines and forced the Packard style connector on the JPT version pump. Which I guess is a thing you can do but I’d rather not if I have a choice.

Thanks in advance for any help with this!

u/DerCribben — 2 months ago