Need some advice here. I've read the petcock screw posting on this site and it recommends 6m x9 x25mm. Last nite I went to Lowes and using the thread gauge mine appears to be 5m not 6. I only have one screw left as I had drill them all out and it is bent at that. Knowing the nuts are welded inside the tank I am not going to take any risk buggering this up. Did any of the 305 dreams use 5m?
Thanks
Need advice- petcock screws
- hondadreamca77
- honda305.com Member
- Posts: 142
- Joined: Fri Sep 07, 2012 10:38 am
- Location: NW Florida
M5 x 0.9mm pitch sounds right. These are JIS threads. M6 is the same pitch in both JIS and ISO Metric.
Here are the comparisons for reference....
Thread size- newISO - oldJIS
3mm 0.5 0.6
4mm 0.7 0.75
5mm 0.8 0.9
6mm 1.0 1.0
8mm 1.25 1.0
10mm 1.5 1.25
12mm 1.75 1.5
G
Here are the comparisons for reference....
Thread size- newISO - oldJIS
3mm 0.5 0.6
4mm 0.7 0.75
5mm 0.8 0.9
6mm 1.0 1.0
8mm 1.25 1.0
10mm 1.5 1.25
12mm 1.75 1.5
G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F