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View Full Version : Flexable Coolant Hose Thread Size?



Willy
05-08-2018, 07:11 PM
Just wondering if anyone here has used this type of coolant hose and what size thread they use on their fittings? (Link below.)

Was thinking of buying a few but thought I'd check in here first so that I would have all my ducks in a row when it got here in regards to fittings, etc.
Thought at first it was 1/4" NPT but from looking at the photos it doesn't appear to be a tapered thread.

Thanks for any input and info you may have on this item

https://www.ebay.com/itm/300mm-Plastic-Flexible-Adjustable-Water-Oil-Coolant-Pipe-Hose-Round-Nozzle-MKLG/263210609627?epid=17011359912&hash=item3d48932bdb:g:p10AAOSwgmJXxaaB

Mark Rand
05-09-2018, 04:25 PM
LocLine is typically NPT, but also avaialble in BSP.

Willy
05-10-2018, 12:09 AM
Thank you Mark, I believe you're right, BSP it is.
I found one today just like it at a friend's place of work and that one was BSP as well. Darn close to 1/4" NPT but no cigar.
Since I have a lot of NPT taps and dies already it looks like my collection will soon see some BSP additions as well.

wtrueman
05-10-2018, 03:02 AM
Is the BSP thread the same as the thread on my older grease nipples? Is so, I find the thread to be closest to fit well.

Willy
05-10-2018, 11:18 AM
Not sure what you've got there so I won't make a blanket statement.
While 1/4" NPT and similar sized BSP are close, like I found earlier, no cigar. The plastic fittings I linked to earlier won't line up exactly with with an 18 tpi thread pitch gauge however I could if wanted forced them into a 1/4" x 18 tpi NPT fitting as they are plastic. Okay perhaps in a low/no pressure installation as a last resort but not correct.

Looking at the link below I see that not only is the thread pitch slightly different so is the thread form. I seem to recall there was a difference but not having that much experience with BSP fittings I thought I'd better do some research. Now that I'm enlightened I'll be sourcing a few BSP taps and dies.
More shop supplies, who'da guessed.:)

http://pipeandhose.com/?q=node%2F2




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bobw53
05-11-2018, 09:25 AM
The adaptors are about $5 for a pack of 4 from McMaster Carr.. Cheaper than a tap.

I would also highly suggest spoiling yourself and getting a pair of loc-line pliers.. I don't know how I ever could
have lived without them.

https://www.mcmaster.com/#loc-line-coolant-hose/=1csmdqo

Dan Dubeau
05-11-2018, 09:31 AM
The adaptors are about $5 for a pack of 4 from McMaster Carr.. Cheaper than a tap.

I would also highly suggest spoiling yourself and getting a pair of loc-line pliers.. I don't know how I ever could
have lived without them.

https://www.mcmaster.com/#loc-line-coolant-hose/=1csmdqo

I will second this. Fought with wet slippery loc line for years. Didn't even KNOW there were pliers for them. Makes leaning in and reattaching pulled off, coolant soaked loc line in the VMC almost enjoyable lol.

DR
05-11-2018, 09:55 AM
LocLine is typically NPT, but also avaialble in BSP.

The problem is that isn't real Loc-Line. Considering Chinese galvanized pipe fitting they supply to the big box stores like Home Depot aren't made to standard specs what reason is there to believe these are?

bobw53
05-11-2018, 09:56 AM
I will second this. Fought with wet slippery loc line for years. Didn't even KNOW there were pliers for them. Makes leaning in and reattaching pulled off, coolant soaked loc line in the VMC almost enjoyable lol.

When I first got into this game, I fought with loc line for years.. And then one day quite a few years into it, I needed some new loc line nozzles, so
I picked up the McMaster Carr catalog and looked at loc line for the first time.... WOW!! they have special pliers.. And HEY, Those Look REALLY Familiar...

We had a pair that was floating around the shop forever... I never knew what they were used for until that day.. That day changed my life for ever...
And I felt like an idiot

Dan Dubeau
05-11-2018, 10:04 AM
When I first got into this game, I fought with loc line for years.. And then one day quite a few years into it, I needed some new loc line nozzles, so
I picked up the McMaster Carr catalog and looked at loc line for the first time.... WOW!! they have special pliers.. And HEY, Those Look REALLY Familiar...

We had a pair that was floating around the shop forever... I never knew what they were used for until that day.. That day changed my life for ever...
And I felt like an idiot

ha ha. That's how I found out they existed too. Fought them for years, thinking "there's GOT to be a better way of doing this" needed to order more loc line, and found them in the catalogue and then felt pretty stupid. I think they were around $15 CDN and worth every penny.

Willy
05-11-2018, 11:41 AM
The adaptors are about $5 for a pack of 4 from McMaster Carr.. Cheaper than a tap.

I would also highly suggest spoiling yourself and getting a pair of loc-line pliers.. I don't know how I ever could
have lived without them.

https://www.mcmaster.com/#loc-line-coolant-hose/=1csmdqo

Since this will be for occasional use in an aluminum manifold only I've got a cheap BSP tap coming for only $1.75 USD (https://www.ebay.com/itm/BSP-55-Degree-1-4-HSS-Pipe-Four-Flutes-13-x-2mm-Screw-Pipe-Thread-Tap-G1-4-19/302604381036?hash=item4674a06b6c:g:O70AAOSwc6JaXZy D).
I don't like buying cheap taps as a rule because they can get very expensive in hurry, I figured for the amount and type of service it will see I'd take a chance on this one. We'll see.

Thanks for jogging my memory on the loc-line pliers, I knew I'd seen them before but forgot about them until your post.