CB performance air filters

[AxlFoley]

I have a set of these air filters but I’m missing two lengths of threaded bar to attach the top, I can’t figure out the thread type, just wondering if anyone knows it?

Thanks

Mark

 

[sparkywig]

Sorry, no I don't. But I can tell you it's definitely not metric.
I'd be tempted to rethread the base and fit some M4/M5 threaded rod, at least you'll be able to get some fasteners that fit.

 

[K@rlos]

Sorry, no I don't. But I can tell you it's definitely not metric.
I'd be tempted to rethread the base and fit some M4/M5 threaded rod, at least you'll be able to get some fasteners that fit.

^^^^^ this! it’s some god forsaken UNC thread, don’t know why the yanks can’t just use Metric like everyone else in the developed world, especially when building parts for European vehicles which are metric! drill & tap it for an m5 heli-coil then get some studding & wing nuts to suit

 

[AxlFoley]

I feel you have both been there

Thanks both will do.

 

[static]

^^^^^ this! it’s some god forsaken UNC thread, don’t know why the yanks can’t just use Metric like everyone else in the developed world, especially when building parts for European vehicles which are metric!

We only do this because you forgot to capitalize “Yanks”.

 

[K@rlos]

We only do this because you forgot to capitalize “Yanks”.

Touché

 

['77 westy]

Just buy a length of 3/16” UNC threaded rod and cut to the length you need. Any decent fastener supplier will have it, or eBay. https://www.ebay.co.uk/itm/285939599316

 

[naskeet]

^^^^^ this! it’s some god forsaken UNC thread, don’t know why the yanks can’t just use Metric like everyone else in the developed world, especially when building parts for European vehicles which are metric! drill & tap it for an m5 heli-coil then get some studding & wing nuts to suit

I think science & technology organisation in the USA are gradually making the transition to metric measurement, but it might take a few hundred years to complete the process. Working out U-values for walls can be a challenge when using BTU/hour, with thickness measured in inches and areas in square feet!?! Having used the metric system in science, technology & engineering for more than 55 years, I concur that it is a much simpler and more rational system.

I'm not sure whether UNF - Unified National Fine & UNC Unified National Course are British or American thread-sizes, but it was used on BLMC cars such as my 1974 Triumph Toledo 1300 "HL Special". I suspect there are American thread-sizes used exclusively in the USA.

For some strange reason, The USA are still using Olde English Queen Anne wine-gallons (rebranded as US gallons) as a measure of volume for liquids such as petrol (i.e. gasoline in USA parlance, but confusingly abbreviated to "gas"). Even stranger is the fact that US pints, quarts & gallons for liquid measures are different from US pints, quarts & gallons for dry measures!!!

They also seem to buck the norm by using 110V 60Hz AC mains electricity instead of the almost universal 240V 50Hz AC mains electricity, so if you have an American specification 1968~79 VW Type 2 with mains-hook-up, you might have to completely change the system for use in Great Britain, Europe and the rest of the World..

 

['77 westy]

Standard seat belt retaining bolts are 7/16 UNF, regardless of whether the vehicle has been manufactured with metric or imperial fasteners.

 

[olnow]

Euro carb sell 'em if you're wanting an easy option

CB3381 CB Performance air filter stud fixing kit

https://www.dellorto.co.uk/shop/vw-...linkages-parts/cb-air-filter-stud-fixing-kit/

 

[UnSlow]

M5 x1 sounds pretty metric to me.

 

[67panel]

Bit off thread (ha ha) but pluming up some calipers on my mates hot rod with Wilwood 4 pots , turns out the inlet thread is 1/8 NPT so we have to get 1/8 NPT to 3/8th UNF adaptors.

 

[olnow]

It's 10/24. The diameter of the screw is size 10 (3/16″) and it has 24 threads per inch

 

['77 westy]

#10-24 = 3/16" x 24 TPI = 3/16” UNC but not M5 x 1mm.