3/8 UNF Cylinder head nuts

[Richard B]

Does anyone know who has is stock some of the old (heavy) 3/8"UNF nuts.

Trying to torque Stephs engine to 46lb/ft and we keep stripping the threads on the nuts... Arghhhhh!  ??)




Not the shiney plated things.

[Pete Lewis]

canley sell HD high tensile nuts   110748HD  and washers WP9

std nuts are desinged to take 29/31  so at 42/46 they give out  so do the washers

http://www.canleyclassics.com/searchforapart/?desc=CYLINDER%20HEAD%20NUT%20-%20HER/SPIT/VIT1/GT6%201%20HEAVY%20DUTY


run a die nut dowwn the threads to clean out any debris that could stop the nut pulling down fully.
Pete

[drofgum]

Richard,
Or if nothing else comes to hand the wheel nuts for Spitfires etc. are 3/8-24 and will also withstand the torque.
                                                                    Cheers,
                                                                    Paul

[Tim Bancroft]

What about trying your local fastener stockists-can't remember their name, you know the co. as Jacobs Green!

[32valves]

You can also try Nevlock and Arrow Precision. I beleive that Moss also have the top grade fasteners but you have to ask for them and they cost LOTS.

[Richard B]

Cheers guys, took them of an old engine in the lockup. Knew there was a reason I hadn't binned it.

Talking of scrap I'll post some piccies later of Stephs old 'trashed' engine.


Brken conrod, shagged crank and holed/cracked block. Otherwise it's fine. I'll check with Margnor in the morning for a stock refill.  8)