cliff.b Posted May 17, 2022 Report Share Posted May 17, 2022 Does anyone know what the thread is on the Spitfire rear wheel bearing grease nipple? I have one somewhere but can't find it 🙄 Link to comment Share on other sites More sharing options...
Gary Flinn Posted May 17, 2022 Report Share Posted May 17, 2022 Found this by doing a Search on here "Thanks to you both. It seems remarkably difficult to find definitive references but....are they.... "small one" 1/4 UNF. 28 tpi, od 0.25 in / 6.35mm "large one" 1/8 BSP, 28 tpi, od 0.383 in / 9.7mm Next on my list of confusing issues, parallel or taper thread for the BSP version? Can anyone confirm?" I believe the rear Hub ones are the smaller 1/4 UNF Â Link to comment Share on other sites More sharing options...
cliff.b Posted May 17, 2022 Author Report Share Posted May 17, 2022 2 minutes ago, Gary Flinn said: Found this by doing a Search on here "Thanks to you both. It seems remarkably difficult to find definitive references but....are they.... "small one" 1/4 UNF. 28 tpi, od 0.25 in / 6.35mm "large one" 1/8 BSP, 28 tpi, od 0.383 in / 9.7mm Next on my list of confusing issues, parallel or taper thread for the BSP version? Can anyone confirm?" I believe the rear Hub ones are the smaller 1/4 UNF  Right, that has confused me even more now. The rear hub ones are larger as I offered up a nipple from the front trunnions & it was too small. Looking online, I found ANG say they have both, listed separately but the description of each says 1/4" UNF. Just as a matter of interest I tried an old brake bleed nipple in the rear and that fits perfectly. Something tells me they are 3/8" UNF but not certain. The more I look, the more conflicting information I am finding 😡 Link to comment Share on other sites More sharing options...
cliff.b Posted May 17, 2022 Author Report Share Posted May 17, 2022 Hmm, Rimmer's has a drawing of the rear hub and it says 1/4" BSP straight Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 17, 2022 Report Share Posted May 17, 2022 all the ones i have are straight threads be they straight or angled you can tell as the angled ones always tighten facing the wrong way Ha ! Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted May 17, 2022 Report Share Posted May 17, 2022 I'd assume they're straight threads as all mine tighten fully to the 'nut' part. Link to comment Share on other sites More sharing options...
cliff.b Posted May 17, 2022 Author Report Share Posted May 17, 2022 2 hours ago, Colin Lindsay said: I'd assume they're straight threads as all mine tighten fully to the 'nut' part. Yes, makes sense. I have ordered a couple that specifically say they are for the rear bearings, even though the quoted thread doesn't make sense. They are only a couple of £ so happy to see what turns up. Link to comment Share on other sites More sharing options...
1969Mk3Spitfire Posted May 18, 2022 Report Share Posted May 18, 2022 Searching the interweb for thread sizes and types provides only contradiction and confusion. I bought a small plastic box full of imperial and metric, straight, 45 and 90 degree. It cost around £15 and has yet to let me down. Link to comment Share on other sites More sharing options...
Peter Truman Posted May 18, 2022 Report Share Posted May 18, 2022 go with parallel too as I sometimes have to put a fiber washer under the hex to get the nipple in the right orientation. Link to comment Share on other sites More sharing options...
cliff.b Posted May 18, 2022 Author Report Share Posted May 18, 2022 5 hours ago, 1969Mk3Spitfire said: Searching the interweb for thread sizes and types provides only contradiction and confusion. I bought a small plastic box full of imperial and metric, straight, 45 and 90 degree. It cost around £15 and has yet to let me down. Yes, that's what I found 🥴 Link to comment Share on other sites More sharing options...
RogerH Posted May 18, 2022 Report Share Posted May 18, 2022 I thought this was a forum thread about grease nipples. But now I realise this is a forum thread about grease nipple threads  Going for a lay down now.  Roger 1 Link to comment Share on other sites More sharing options...
Chris A Posted May 18, 2022 Report Share Posted May 18, 2022 46 minutes ago, RogerH said: I thought this was a forum thread about grease nipples. But now I realise this is a forum thread about grease nipple threads  Going for a lay down now.  Roger Yes it was but with thread drift it has become a thread about grease nipples. I'm also going for a lay down. . . 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted May 18, 2022 Report Share Posted May 18, 2022 i just think about nipples  its a more exciting hands on experience already laying down Pete 2 Link to comment Share on other sites More sharing options...
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