Clevis Pins

John Austin · Post by **John Austin** » Fri Nov 19, 2010 7:45 pm

My Tipsy Nipper has just been through its permit and has had an 'advisery' to ream/drill out the control surface hinges and replace the 3/16" dia clevis pins with 5mm dia pins. Does anybody know where I might source some 5mm pins of an equivalent material to the originals? I've tried to look up the reference given in the Mk2 Owners manual (i.e. SP/4Z/B14-0 3/16") but I've drawn a blank.

Mike Mold · Post by **Mike Mold** » Fri Nov 19, 2010 7:56 pm

http://tasmanindustries.co.uk might be able to help.

Sandy Hutton LAA372 · Post by **Sandy Hutton LAA372** » Sat Nov 20, 2010 6:51 pm

Rather than ream out to the metric size, I'd recommend the SP4Y, Cadmium plated pins instead.

Gary T · Post by **Gary T** » Sat Nov 20, 2010 7:09 pm

"Rather than ream out to the metric size, I'd recommend the SP4Y, Cadmium plated pins instead."

Agreed - I have play in a Nipper which was picked up at Permit a little while ago. My inspector has instructed me to ream out to accept 7/32" SP4Y pins from LAS Aero.
Be aware that you'll need a narrow headed drill if you intend to ream in-situ as the hinges are very close to the wing and a conventional chuck will not allow you to drill parallel holes!

John Austin · Post by **John Austin** » Thu Dec 09, 2010 8:05 pm

Thanks for all your advice, I'll give SP4Y pins a go when the weather warms up a bit and I can get to the airfield!