Greta Posted December 28, 2019 Share Posted December 28, 2019 Happy Christmas ... my first day in the garage for nearly 5 weeks sees me hit all kinds of frustrations ... but I know you guys will love some distraction from the family Christmas I recently got two K&N Air Filters from Ebay for my 1 1/4 SU HS2 ( Spitfire MKII ) - but the bolts supplied don't seem to fit the casting on the carb body - The original air filter box was attached with 4 x HB867 - longish bolts ... I need the equivalent threaded bolts short enough to fit inside the K&N units. The originals look like UNC - but can anyone tell me the bits I need before I buy lots of random bolts - Thanks Link to comment Share on other sites More sharing options...
Nick Jones Posted December 28, 2019 Share Posted December 28, 2019 I think you are right about the UNC...... They are 5/16" and 3/4" long should be plenty. Suggest a spring washer and/or loctite when fitting them. Link to comment Share on other sites More sharing options...
yorkshire_spam Posted December 28, 2019 Share Posted December 28, 2019 HB867/HB0867 are 5/16" UNC X 2 1/8", so I guess you need some 5/16" UNC at a more appropriate length? Somewhere around 1" at a guess? Link to comment Share on other sites More sharing options...
Greta Posted December 28, 2019 Author Share Posted December 28, 2019 Cheers - Just found Westfield Fastners: https://www.westfieldfasteners.co.uk/A2_ScrewBolt_HexHd_UNCoarse0.3125_THRfull.html thanks Link to comment Share on other sites More sharing options...
TimBancroft Posted December 29, 2019 Share Posted December 29, 2019 Nuala, I used Westfield to buy some stainless steel fasteners, good service but pricey. Try Namrick, more competitively priced and great proven service. https://www.namrick.co.uk/ Link to comment Share on other sites More sharing options...
yorkshire_spam Posted December 29, 2019 Share Posted December 29, 2019 7 hours ago, TimBancroft said: Nuala, I used Westfield to buy some stainless steel fasteners, good service but pricey. Try Namrick, more competitively priced and great proven service. https://www.namrick.co.uk/ That's good advice from Tim - I tend to use Namrick whenever possible. Link to comment Share on other sites More sharing options...
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