M12x1.25 lambda sensor boss; where to buy?

v8250 · Post by **v8250** » Mon Jun 08, 2015 8:32 pm

Guys, I'm needing 2no M12x1.25 lambda sensor bosses in 304 or 316 grade stainless. Plenty out there in mild steel or M18 in st/st[!] Can anyone recommend a good reliable supplier? Thank you...

ged · Post by **ged** » Tue Jun 09, 2015 4:28 am

Hi,

If you pm me a dimensioned sketch I'll give you a price.

Best Regards

Ged.

v8250 · Post by **v8250** » Tue Jun 09, 2015 5:31 pm

Thanks Ged, even thinking of getting some 20-22mm rod off-cut and making them myself, can't believe they're not readily available off the shelf.

They are for standard M12x1.25 thread pitch TVR Chimaera/RV8 lambda sensors. Will ping dimensions to you when next in garage.

Anyone else know of a supplier where they're sat on the shelf waiting to be bought?

stevieturbo · Post by **stevieturbo** » Tue Jun 09, 2015 10:14 pm

Very unusual thread.

Buy a couple of nuts and tap them out to that thread

v8250 · Post by **v8250** » Wed Jun 10, 2015 4:27 pm

stevieturbo wrote:Very unusual thread. Buy a couple of nuts and tap them out to that thread

Not at all unusual, these are the thread sizes for standard Chimaera/RV8 NTK/NGK sensors. European orientated sensor sizes are M18 and it appears most other modern sensors have followed the M18 route.

I prefer to tap a correct piece of shouldered st/st rod rather than run the risk of galling the sensor thread. Will keep on with the search...

v8250 · Post by **v8250** » Sat Jun 13, 2015 7:58 am

Guys,

As an update I've been able to get correct st/st RV8/Chimaera bosses from Racetech Direct near Henley. They're a little pricey at £9 each, but they'll arrive ready to weld without any faffing around. Should anyone else need these Racetech can be contacted on 01491.629219. Talk to Mark, who's been extremely helpful...

...though he did say no one has ever asked for M12x1.25 before which is odd as they sell many Chimaera/RV8 OEM probes of this size.

ged · Post by **ged** » Sat Jun 13, 2015 8:24 am

£9.00 each! I'm obviously not charging enough.

Best Regards

Ged.

v8250 · Post by **v8250** » Sat Jun 13, 2015 8:40 am

ged wrote:£9.00 each! I'm obviously not charging enough.

Best Regards

Ged.

Clearly not

I too thought this was a bit steep as M18's are £6-£7 each but they'll be on my door step today or Monday.

DaveEFI · Post by **DaveEFI** » Sat Jun 13, 2015 9:43 am

You can buy SS M18 bosses on Ebay for £2.50 inc postage.

v8250 · Post by **v8250** » Sat Jun 13, 2015 3:28 pm

DaveEFI wrote:You can buy SS M18 bosses on Ebay for £2.50 inc postage.

Very true, but M18's no bloody use whatsoever + one has to be very careful as to the term 'stainless steel' from some fleabay suppliers. Unless genuine BS/EN grade 304 or 316 it'll rust just like cheap steel.

https://en.wikipedia.org/wiki/Stainless_steel

DaveEFI · Post by **DaveEFI** » Sat Jun 13, 2015 5:03 pm

v8250 wrote:
DaveEFI wrote:You can buy SS M18 bosses on Ebay for £2.50 inc postage.
Very true, but M18's no bloody use whatsoever + one has to be very careful as to the term 'stainless steel' from some fleabay suppliers. Unless genuine BS/EN grade 304 or 316 it'll rust just like cheap steel.

https://en.wikipedia.org/wiki/Stainless_steel

Says 304 in the ad. But looks a bit shorter than mine.

v8250 · Post by **v8250** » Sat Jun 13, 2015 5:52 pm

Just like buses, waiting for ages...no bus, then five come along at the same time; thought it good to share should anyone need sensors and bosses...

http://www.lambdasensor.co.uk/main/msundries.htm

ged · Post by **ged** » Sat Jun 13, 2015 6:05 pm

v8250 wrote:
ged wrote:£9.00 each! I'm obviously not charging enough.

Best Regards

Ged.
Clearly not I too thought this was a bit steep as M18's are £6-£7 each but they'll be on my door step today or Monday.

Hi v8250

It's entirely your choice where you buy from but I'd had the information requested you would have had them for £10.00 total including P&P on your doorstep yesterday.

Its not a problem, maybe I can help you in the future.

Best regards
Ged

v8250 · Post by **v8250** » Sat Jun 20, 2015 11:21 am

Thanks Ged, that's very kind of you. What other components do you make? It's always handy to know a source when an odd part is req'd. Rgds, Andrew