foxy99
Posted a lot
Posts: 1,330
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I bought an old trailer the other week and during the handover noticed one of the axle nuts was missing. The seller seemed genuinely surprised it wasn't there - especially since he'd been using the trailer regularly. Anyway, being a cautious type, I decided to just take the wheel away after paying for it and planned to return with a suitable nut. I couldn't find one and just drilled the axle and put a split-pin in it to get me home (5 miles) but an still hunting for the right nut. I convinced myself it was 1" BSF (10TPI) but after getting the other nut off tonight to examine it am thinking it's 1" BSW (8TPI) Anyway the point of this post is... Do the 6 triangles stamped on the outer face indicate anything? Like BSW for example. I know that on UNC/UNF fasteners (when they were a new thing) there were rings stamped or cast on them for easy identification (well My Rootes parts list says that's the case) so was thinking this may also be an ID thing. NB if I could find my screw-pitch gauge I wouldn't need to be guessing and measuring with rulers/verniers but that's all I had tonight  trailer axle has a very coarse 1" thread on it  initial check of pitch looked like 0.1" so 10TPI  AF size corresponds with 1" BSF nuts for sale online  1 1/2" AF spanner is a loose fit nut from other end of axle has weird stamping on it   looks like pitch is about 3mm or 1/8", not 2.5mm or 1/10" as I originally thought |
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Last Edit: Aug 27, 2023 2:24:28 GMT by foxy99
1974 Daimler Double-Six VDP
1965/67 Hillman Imp pick-up
1984 VW Polo breadvan
1970s Yamaha Twins (4)
1976 Honda SS50ZK1
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tonup
Part of things
Posts: 39 
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Thats a ‘stiff nut’. Its where they have stamped the nut to push the areas in front of the triangles inwards to make the thread tighter.
Your vernier does show 10 tpi,, not sure about the tape. Best to measure the male part.
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pptom
Part of things
Posts: 452
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pptom
Part of things
Posts: 452
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Aug 27, 2023 15:00:03 GMT |
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Sorry, missed that you already had one that's lost!
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foxy99
Posted a lot
Posts: 1,330
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Aug 27, 2023 23:16:01 GMT |
It's pretty old (the trailer). Full story of my 4! old trailers is on a different thread It's getting out of hand....  Whitworth-era trailer? |
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1974 Daimler Double-Six VDP
1965/67 Hillman Imp pick-up
1984 VW Polo breadvan
1970s Yamaha Twins (4)
1976 Honda SS50ZK1
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slater
Club Retro Rides Member
Posts: 6,360
Club RR Member Number: 78
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Aug 29, 2023 10:46:04 GMT |
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Could be UNC.. (60degree angle instead of 55degree for BSW..) in reality doesn't make a huge difference.
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foxy99
Posted a lot
Posts: 1,330
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Aug 30, 2023 20:12:37 GMT |
You got here before me  I was looking at my Presto Counsellor booklet (the Bible?) and noticed the 1" UNC is effectively the same. Was .'. straight onto Ebay to see if this would throw any suitable items up and it does widen the net but now worried about the actual width (AF) of the nut as I saw one (BSW) which was too wide to fit in the recess on my wheel. Having said that just found a listing for 1" UNC and it gives AF that matches mine but you need to buy 10. I'll never use the other 9 lol. NB I measured the threads on the shaft last night and it's defo 8TPI |
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1974 Daimler Double-Six VDP
1965/67 Hillman Imp pick-up
1984 VW Polo breadvan
1970s Yamaha Twins (4)
1976 Honda SS50ZK1
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LIKE 
