Help Identifying Bolts

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Heuer
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#1 Help Identifying Bolts

Post by Heuer » Sun Oct 25, 2015 1:55 pm

I am in the process of updating the Factory Fit post on the various bolts used by Jaguar. These came off the IRS of the car belonging to Dave (bopperd) and have not seen a spanner since the car left the Factory:
ImageImageImage

The middle one is part#7720, Bolt securing Cylinders to Calliper and has three crowns followed by the letter 'J'. The other two are front wheel brake cylinder bolts. Can anybody identify who the makers were by the initials? The post is here if it helps and you can see what I have decoded so far: viewtopic.php?t=2006&postdays=0&postorder=asc&start=152

NB: a single letter refers to the tensile strength: R = 45tsi. S = 50tsi, T = 55tsi
David Jones
S1 OTS OSB
1997 Porsche 911 Guards Red
2026 Lexus LBX

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