Instrument panel bolts?

let me know what you need and we maybe able to help with some….a bit cheaper than buying

Crikey, a thread guru! Actually I quite like the sound of that! 🙂

Anyway, as has already been said, you will mostly need 4BA (4mm clearance hole) or 2BA (5.5mm clearance hole) for fixing instruments, and maybe the odd small 6BA, in a variety of lengths around 1″ long and a mixture of countersunk (most common) or round head.

As XF940 said, some instruments (the Mk.4 GM compass is a good example as are some Turn & Slip instruments) used a ‘Unified’ thread which can be identified by a OOO symbol somewhere near the mounting holes. They’re usually UNF threads but off the top of my head I can’t remember what they are.

As for sources, you could go to LAS and pay through the nose for traceable, airworthy spec. fasteners, or you could buy commercial brass machine screws much cheaper. They’ll probably have to be painted anyway so it makes no difference for a static panel.

For example, try Fastfix Direct http://www.fastfixdirect.co.uk/, although they only seem to sell in larger quantities since I last ordered from them,

or EKP Supplies http://www.ekp.supplies.btinternet.co.uk/ for smaller quantities.

Some instruments also use Unified thread screws. Am sure some of the RPM gauges do and I know the Mk4 clocks do… Had some difficulty when making up my Hunter panels as I have tons of BA but hardly any UNF/UNC

MarkG is a bit of a guru when it comes to threads and no doubt he will be able to provide a more comprehensive answer. If I recall, any instrument that uses Unified will have a oo (sideways 8) marked on it or on the mounting points.

😀 It won’t be flying in the near future then?

Hi yes we have the complete nose section 😉

Hi Matt, I hope you’ve got the rest of the Canberra to go with the instrument panel?