If you have mentioned that the shaft tread was still OK, it would have been solved a long time ago. Nuts are available in all sizes, types and materials in Central Nuts and Bolts in Jalan San Peng near 'Hor Chin Yeen'. I usually buy screws, nut and bolts from these kind of shops also known as 'fasteners centers'. In fact there are 2 near my area near The Mines. Like those small little allen bolts that I use on my wife's pedals, works wonders    They grip better than the normal ones provided by pedal companies. The cost, only RM4.50 for 30 pcs compared to RM30 for 8 pcs Shimano ones



Like those allen bolts for the bottle cage , I got them at 20 cents each (stainless steel ones lagi  ) from these shops.  Usually bike screws, nuts and bolts are metric sizes M4, M5 and in the case of brakes M6. Next time, go to these shops for bolts and nuts part.

Finally...drop by kimbell jaya to pick up my vigor n see2 look2 ard any racun bikes n stuff...jimmy told me they hv only 3 more units left n theres no more stock fr supplier till december...maybe then 2016 modeĺ....gosh...
Saw a red speed 8 on display...much better than white n green.....but jetstream caught my attention but kena dig deep to my wallet .....so ....maybe next time...😆😆

  For those using 7 speed bikes but finds climbing hills tough,here's a cheaper solution. This has 34 T as the final gear. although shifting to the last gear may be slightly rough,just treat it as 6 speed. Use the last only for climbing. 



The link to the seller,
http://bicyclebuysell.com/item/225865/shim...range-6-7-speed