ボルト - Bolt
The bolts sold here do not have any marking on the head. This was common in the seventies. Usually M10 and above should be "fine pitch" with "small head" on Japanese bikes.
Two types of treatments are proposed:
- Trivalent plating treatment is a modern plating that looks similar to zinc without the chemical hazard and better consistency and corrosion resistance. This is the standard for Japanese manufacture and I recommand it for a perfect looking and lasting restoration.
- Chromate plating for resistance to corrosion. Electrogalvanizing is applied to the base, and then a chromate treatment using hexavalent chromium, which is a chemical conversion treatment, is applied. The chromate film changes its color from blue to yellow to red to red-green to green-brown to brownish brown as the chromate film immersion time of the zinc plating solution increases and the thickness of the chromate film increases. Hexavalent chromium is subject to RoHS regulations but still widely used. These are the few yellow bolts on our bikes.
Japanese vintage motorcycles, JIS screw, small head nut, small head bolt, pan head screw, honda, Kawasaki, Yamaha, Suzuki, Kawasaki 900 Z1, honda 750 CB K, Yamaha 350 rd, Suzuki 750 gt, zinc, stainless, acorn nut, black zinc, Japanese industrial standard, JIS screwdriver, engine bolt, flange bolt
Bolt Fine Pitch Partial Thread
M10 M12 35 o 40 o o 45 o o 50 o o 55 o 60 o o 65 o o 70 o o 75 o o 80 o 90 o 100 o 110 o o 120 o 125 o 130 o 140 150 o M10 M12 35 o o 40 o o 45 o o 50 o o 55 o o 60 o o 65 o o 70 o o 75 o o 80 o o 90 o o 100 o o 110 o o 120 o o 125 o 130 o 140 o 150 o o