Bell housing threads.

[Vince Caldicott]

I've bought myself an engine crane and stand as I'm looking to rebuild the old 428 which I took  out of my cobra. Unfortunately, the engine stand has a plate with four adjustable arms which each have a 40mm tube spacers which you bolt through to the engine to hold the engine. I need to buy some 70mm bolts to bolt through to the spacers to the bell housing, the existing bell housing bolts are too short. I've tried everywhere locally to buy these without success, does anybody know what the thread is, it's not a metric thread so I,m assuming a whitworth or af thread.
Vince

[AC Ace Bristol]

.
Vincent

If your in the UK ??   Give Trident a call or go on line:


www.tridentracing.co.uk

Unit 23,  Silverstone Circuit. Silverstone, Northamptonshire, NN12 8TN
tel :  01327 857822

Keith
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[Vince Caldicott]

Thanks Keith, all sorted, great website.
Vince

[rsk289]

Just for the record Vince, they are 7/16 UNC - a common size for US engine threads.

As an aside, I'm getting deep into my next project - an XK140 DHC - and it has UNC (also known as ANC) threads all over the place.  Also the usual suspects, some BSW/BSF, BA and a few UNF, but surprised to find an English engine with UNC as the common thread.  Ford (USA) used it all over the place.

Roger