TSR 2 Bolts I.D.

i’d be very suprised if any bolts on a british aircraft were measured in millimetres (although i’m quite prepared to be proved wrong!).
american bolts have the diameter and length of the plain shank measured in 1/16ths of an inch, some english bolts have the diameter in 16ths of an inch, and the overall length (from under the head, to the end of the thread , including the thread), measured in 10ths of an inch.

they look like close tolerance bolts, with a ground shank , as opposed to a standard bolt. they could either have been used on an engine, or in a close tolerance part of the structure.
i’m not sure if they are TSR2 specific, as we still use similar (but not exactly the same) bolts today.

Many thanks for the input Geoff, but unfortunately the second number bears no resemblence to the length. I’d already thought of that. Pity. However I’ve tried to take a photo (hopefully attached) but I only have a basic camera. The numbers at the top are in centimetres and the ones at the end relate to the number after the 9003-. They are a dull copper colour though as you say. Again many thanks for helping me out on this and of course for your time.

TSR2 bolts

I worked on the design of TSR2, but after 40 years I cannot remember the part number of bolts. However I suggest that TJB 9003 defines the basic type and diameter, and the dash numbers would indicate the length. Thus -105 would indicate length from under head to end of thread to be 105 millimetres. Try measuring the bolts to see if I’m right.
The head you describe is actually two hexagons 30 degrees apart, giving a 12-point shape, usually indicating a close tolerance shear bolt of high-tensile stainless steel or titanium. Titanium has a distinct colour, like dull copper.
I will try to find out about the TJB part, it looks like a unique part number of a special part for TSR2.
Regards from,
Geoff.

There are numbers on the heads as follows;

T J B 9003-105, 9003-68, 9003-60 9003-140 AND 9003-90

There are titanium ( I think) and have quite strange heads on them with 12 ‘flutes’ around the edge and a hole in the middle. Most of the shaft is plain with just the end 6/7mm threaded.
Any help?

Are any letters/numbers stamped on the head of the bolts?
Aircraft bolts usually have part numbers on them!

Keith

Your best bet is to contact the RAF Museum with the details – a part number might be handy if you have one.

A friend of mine has kindly given me some of what he thinks are TSR 2 fixing bolts.(which will make a good display feature for my Airfix kit).
Not that I disbelieve him but, does anyone out there know how to identify them as they are quite distinctive. Apparently his dad used to work on the aircraft so I suppose thats a good enough provenence really. Thanks.