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Old 22 August 2016, 05:44   #1
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trailer bolts

Hi I have noticed that the short arms that hold the wobble rollers on my indespension trailer have seized up. On closer inspection the bolts holding the arms onto the beams have rusted up and in 1 case the head has snapped off. My question is what type of bolts should I replace them with? - Standard bolts? Galvanized bolts? or stainless steel bolts?
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Old 22 August 2016, 05:55   #2
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galv is best but doubt you will get them that small only electroplated, their pence anyway and you can change out each time you service the trailer.
you could use stainless but you will find they corrode with the steel.
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Old 22 August 2016, 10:09   #3
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Old 22 August 2016, 11:36   #4
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Hot dipped galvanized if you can find them. Zinc plating only protects steel for about 10 minutes in salt water conditions (that was facetious, before anyone starts quoting scientific studies.)

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Old 22 August 2016, 11:40   #5
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Quote:
Originally Posted by Ribtec1 View Post
Hi I have noticed that the short arms that hold the wobble rollers on my indespension trailer have seized up. On closer inspection the bolts holding the arms onto the beams have rusted up and in 1 case the head has snapped off. My question is what type of bolts should I replace them with? - Standard bolts? Galvanized bolts? or stainless steel bolts?

What size are they? & where are you?


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Old 23 August 2016, 04:24   #6
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What size are they? & where are you?


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Hi
Bolts are m8 x 50mm . I had a quick look yesterday on the internet at the galv. ones and there seem to be plenty of 6mm but when you go to 8mm they get plenty expensive. I suppose the originals have lasted 17 odd years so standard bolts may be the way to go. I live in north west of Ireland.
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Old 23 August 2016, 05:14   #7
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M8x50 are readily available. You could try BAPP, but I'm guessing the delivery will be prohibitive.
http://www.bapp.co.uk


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Old 23 August 2016, 13:53   #8
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Looking at the price of galvanised bolts, I'd go for stainless. They'll last longer than the electro-zinc rubbish (JKY ....10mins ) and they'll be well hard enough for your application. (50 nuts bolts & washers 16).

M8 FULLY THREADED HEXAGON HEX BOLT SET SCREW + NUT AND WASHER A2 STAINLESS | eBay
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Old 23 August 2016, 14:00   #9
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I'd go for A4 (316). Will last forever...maybe overkill thought
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Old 23 August 2016, 14:55   #10
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I think A4 is probably overkill for a trailer....maybe go with nylock nuts.
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