HoggyN Posted November 22, 2015 Share Posted November 22, 2015 Does anybody know the thread used on the output flange studs (trans brake to prop)? They don't appear to be 3/8 UNF. A 15 mm socket fits the nut but 9/16 AF won't. Quote Link to comment Share on other sites More sharing options...
Grem Posted November 22, 2015 Share Posted November 22, 2015 Probably 5/16th Whitworth Quote Link to comment Share on other sites More sharing options...
Gassed'58 Posted November 22, 2015 Share Posted November 22, 2015 .............. They are bolts not studs and are 5/16 BSF ............... part number 217565 Quote Link to comment Share on other sites More sharing options...
HoggyN Posted November 22, 2015 Author Share Posted November 22, 2015 Thanks guys. I must admit to being a bit confused. I've just been out with a vernier and the bolts are 0.3750 in diameter and the nuts are 0.6000 across the flats. Which would suggest 3/8 Whitworth? Quote Link to comment Share on other sites More sharing options...
steve b Posted November 23, 2015 Share Posted November 23, 2015 They are BSF . The head or nut size across the flats for 3/8" BSF and BSW is the same . cheers Steveb Quote Link to comment Share on other sites More sharing options...
secondjeremy Posted December 4, 2015 Share Posted December 4, 2015 Confirm BSF - Whitworth threads are much coarser - BSF was an improved thread for machinery and the motor trade which was finer. The nuts were such that the existing Whitworth spanners would fit. If you're removing the prop from the handbrake flange drop the rear end first. Even with a good range of BSF spanners its virtually impossible to turn the nuts with the prop attached to the axle. Drop it first and the job is slightly less difficult. Quote Link to comment Share on other sites More sharing options...
HoggyN Posted December 4, 2015 Author Share Posted December 4, 2015 Tell me about it! I've had to resort to grinding down a socket to fit. If it wasn't such a pain in the rear removing the drum and flange etc, I'd swap the bolts for later ones as used on the other prop flanges. Quote Link to comment Share on other sites More sharing options...
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