フランジボルト - Flange Bolt
 
No marking on the head.
The flange is not serrated.
 
Four types of treatments are proposed:
- Zinc white with trivalent plating treatment
- Zinc black with trivalent plating treatment (for the Yamaha)
- Chromate plating, the yellowish effect
- Stainless (stainless steel, no treatment)
 
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